flo-10q_20200418.htm

Project Centennial implementation costs

^[1]

$ 3,392

Total Project Centennial restructuring and implementation costs

$ 3,392

Total Project Centennial restructuring costs

^[2]

$ 718

Reorganization Costs

Restructuring and related impairment charges

^[2]

211

Impairment of Assets

Restructuring and related impairment charges

^[2]

530

Employee Termination Benefits

Restructuring and related impairment charges

^[2]

$ (23)

[1]	Costs are recorded in the selling, distribution and administrative expenses line item of our Condensed Consolidated Statements of Income (Loss).
[2]	Presented on our Condensed Consolidated Statements of Income (Loss)

Components of Other Current Assets (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019	Dec. 11, 2019
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Prepaid assets	$ 16,339	$ 15,380
Recovery from legal settlement in principle		22,300	$ 21,000
Fair value of derivative instruments	1,942	3,191
Collateral to counterparties for derivative positions	13,432	7,012
Income taxes receivable	602	13,924
Other	1,780	946
Total	$ 34,095	$ 62,753

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Current assets:
Cash and cash equivalents	$ 252,683	$ 11,044
Accounts and notes receivable, net of allowances of $13,909 and $9,473, respectively	341,205	285,606
Inventories, net:
Raw materials	51,234	46,171
Packaging materials	23,890	22,045
Finished goods	60,820	58,843
Inventories, net	135,944	127,059
Spare parts and supplies	67,893	67,456
Other	34,095	62,753
Total current assets	831,820	553,918
Property, plant and equipment, net:
Property, plant and equipment, gross	2,000,151	2,002,633
Less: accumulated depreciation	(1,303,084)	(1,284,811)
Property, plant and equipment, net	697,067	717,822
Financing lease right-of-use assets	20,974	22,829
Operating lease right-of-use assets	364,092	376,473
Notes receivable from independent distributor partners	193,126	198,639
Assets held for sale	12,329	4,408
Other assets	7,756	8,236
Goodwill	545,244	545,244
Other intangible assets, net	740,665	750,207
Total assets	3,413,073	3,177,776
Current liabilities:
Current maturities of long-term debt	1,245	3,730
Current maturities of financing leases	7,789	8,176
Current maturities of operating leases	53,030	52,806
Accounts payable	257,994	233,011
Current postretirement/post-employment obligations	926	29,380
Other accrued liabilities	183,930	201,040
Total current liabilities	504,914	528,143
Noncurrent long-term debt	1,069,352	862,778
Noncurrent financing lease obligations	18,068	19,390
Noncurrent operating lease obligations	316,482	324,131
Total long-term debt and right-of-use lease liabilities	1,403,902	1,206,299
Other liabilities:
Postretirement/post-employment obligations	14,344	14,328
Deferred taxes	125,639	121,395
Other long-term liabilities	43,663	44,181
Total other long-term liabilities	183,646	179,904
Commitments and Contingencies
Stockholders’ equity:
Common stock — $.01 stated par value and $.001 current par value, 500,000,000 authorized shares and 228,729,585 shares and 228,729,585 shares issued, respectively	199	199
Treasury stock — 17,167,036 shares and 17,215,514 shares, respectively	(225,942)	(226,287)
Capital in excess of par value	651,258	648,492
Retained earnings	900,988	947,046
Accumulated other comprehensive loss	(5,892)	(106,020)
Total stockholders’ equity	1,320,611	1,263,430
Total liabilities and stockholders’ equity	3,413,073	3,177,776
Series A Preferred Stock
Stockholders’ equity:
Preferred Stock, value
Series B Preferred Stock
Stockholders’ equity:
Preferred Stock, value

Schedule of Borrowings and Repayments Under Facility (Detail) $ in Thousands	4 Months Ended
	Apr. 18, 2020 USD ($)
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Balance at December 28, 2019	$ 26,000
Borrowings	102,500
Payments	(79,500)
Balance at April 18, 2020	49,000
Unsecured Credit Facility
Debt Instrument [Line Items]
Balance at December 28, 2019	41,750
Borrowings	272,600
Payments	(89,350)
Balance at April 18, 2020	$ 225,000

Reconciliation of Debt Issuance Costs and Debt Discounts to the Net Carrying Value for Each Debt Obligation (Excluding Line of Credit Arrangements) (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019	Sep. 28, 2016	Apr. 03, 2012
Debt Instrument [Line Items]
Face Value	$ 801,250	$ 803,750
Debt Issuance Costs and Debt Discount	4,653	4,992
Net Carrying Value	796,597	798,758
Other Notes Payable
Debt Instrument [Line Items]
Face Value	1,250	3,750
Debt Issuance Costs and Debt Discount	5	20
Net Carrying Value	1,245	3,730
2026 Notes
Debt Instrument [Line Items]
Face Value	400,000	400,000	$ 400,000
Debt Issuance Costs and Debt Discount	3,702	3,878
Net Carrying Value	396,298	396,122
2022 Notes
Debt Instrument [Line Items]
Face Value	400,000	400,000		$ 400,000
Debt Issuance Costs and Debt Discount	946	1,094
Net Carrying Value	$ 399,054	$ 398,906

Components of Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Other Liabilities Disclosure [Abstract]
Deferred income	$ 22,941	$ 24,840
Deferred compensation	16,553	15,558
Fair value of derivative instruments	1,222	792
Other deferred credits	1,470	1,609
Other	1,477	1,382
Total	$ 43,663	$ 44,181

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Balances at Dec. 29, 2018	$ 1,258,267	$ 199	$ 653,477	$ 945,410	$ (109,171)	$ (231,648)
Balances (in shares) at Dec. 29, 2018		228,729,585
Balances, treasury shares at Dec. 29, 2018						(17,834,378)
Net (loss) income	65,866			65,866
Derivative instruments, net of tax	(11,771)				(11,771)
Pension and postretirement plans, net of tax	1,648				1,648
Cumulative effect of change in accounting principle	(2,915)			(2,915)
Amortization of share-based compensation awards	3,179		3,179
Issuance of deferred compensation			(1)			$ 1
Issuance of deferred compensation (in shares)						113
Time-based restricted stock units issued (Note 16)			(11,498)			$ 11,498
Time-based restricted stock units issued (in shares)						885,123
Issuance of deferred stock awards			(67)			$ 67
Issuance of deferred stock awards (in shares)						15,822
Stock repurchases	(7,054)					$ (7,054)
Stock repurchases (in shares)						(336,088)
Dividends paid on vested share-based payment awards	(1,233)			(1,233)
Dividends paid	(38,061)			(38,061)
Balances at Apr. 20, 2019	1,267,926	$ 199	645,090	969,067	(119,294)	$ (227,136)
Balances (in shares) at Apr. 20, 2019		228,729,585
Balances, treasury shares at Apr. 20, 2019						(17,269,408)
Balances at Dec. 28, 2019	$ 1,263,430	$ 199	648,492	947,046	(106,020)	$ (226,287)
Balances (in shares) at Dec. 28, 2019		228,729,585
Balances, treasury shares at Dec. 28, 2019	(17,215,514)					(17,215,514)
Net (loss) income	$ (5,772)			(5,772)
Derivative instruments, net of tax	(3,438)				(3,438)
Pension and postretirement plans, net of tax	103,566				103,566
Amortization of share-based compensation awards	3,894		3,894
Issuance of deferred compensation			(1)			$ 1
Issuance of deferred compensation (in shares)						113
Time-based restricted stock units issued (Note 16)			(975)			$ 975
Time-based restricted stock units issued (in shares)						74,204
Issuance of deferred stock awards			(152)			$ 152
Issuance of deferred stock awards (in shares)						11,594
Stock repurchases	(783)					$ (783)
Stock repurchases (in shares)						(37,433)
Dividends paid on vested share-based payment awards	(87)			(87)
Dividends paid	(40,199)			(40,199)
Balances at Apr. 18, 2020	$ 1,320,611	$ 199	$ 651,258	$ 900,988	$ (5,892)	$ (225,942)
Balances (in shares) at Apr. 18, 2020		228,729,585
Balances, treasury shares at Apr. 18, 2020	(17,167,036)					(17,167,036)

Long Term Debt (Net of Issuance Costs and Debt Discounts Excluding Line-of-credit Arrangements) (Parenthetical) (Detail)	4 Months Ended
	Apr. 18, 2020
2026 Notes
Debt Instrument [Line Items]
Senior notes due year	2026
2022 Notes
Debt Instrument [Line Items]
Senior notes due year	2022

Earnings Per Share - Additional Information (Detail) - shares	4 Months Ended
	Apr. 18, 2020	Apr. 20, 2019
Earnings Per Share [Abstract]
Antidilutive Shares excluded from Computation of Earnings Per Share	324,240	438,630

Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Cost	$ 804,491	$ 804,491
Accumulated Amortization	190,926	181,384
Net Value	613,565	623,107
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost	477,193	477,193
Accumulated Amortization	59,809	55,746
Net Value	417,384	421,447
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Cost	318,021	318,021
Accumulated Amortization	123,206	117,836
Net Value	194,815	200,185
Non-Compete Agreements
Finite-Lived Intangible Assets [Line Items]
Cost	5,154	5,154
Accumulated Amortization	4,978	4,954
Net Value	176	200
Distribution Rights
Finite-Lived Intangible Assets [Line Items]
Cost	4,123	4,123
Accumulated Amortization	2,933	2,848
Net Value	$ 1,190	$ 1,275

Summary of Reclassifications Out of AOCI (Detail) - USD ($)
$ in Thousands

4 Months Ended

Apr. 18, 2020

Apr. 20, 2019

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Reclassification from AOCI, Gains and losses on cash flow hedges net of tax

$ (411)

$ 2,178

Reclassification From AOCI, Current Period Net Of Tax

^[1]

(88,284)

530

Derivative Instruments

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Reclassification from AOCI, Gains and losses on cash flow hedges before tax

^[1]

(547)

2,913

Reclassification from AOCI, Gains and losses on cash flow hedges tax (expense) benefit

^[1]

136

(735)

Reclassification from AOCI, Gains and losses on cash flow hedges net of tax

^[1]

(411)

2,178

Reclassification From AOCI, Current Period Net Of Tax

(411)

2,178

Amortization of defined benefit pension items, prior service costs credits

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Reclassification from AOCI, Current Period, before Tax

^[1],[2]

(74)

(106)

Amortization of defined benefit pension items, settlement and curtailment losses

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Reclassification from AOCI, Current Period, before Tax

^[1],[2]

(116,207)

Amortization of defined benefit pension items, actuarial losses

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Reclassification from AOCI, Current Period, before Tax

^[1],[2]

(1,275)

(2,099)

Accumulated Defined Benefit Plans Adjustment

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Reclassification from AOCI, Current Period, before Tax

^[1]

(117,556)

(2,205)

Reclassification from AOCI, Current Period, Tax benefit

^[1]

29,683

557

Reclassification From AOCI, Current Period Net Of Tax

^[1]

(87,873)

(1,648)

Interest Rate Contracts | Derivative Instruments

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Reclassification from AOCI, Gains and losses on cash flow hedges before tax

^[1]

(44)

Commodity Contract | Derivative Instruments

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

Reclassification from AOCI, Gains and losses on cash flow hedges before tax

^[1],[3]

(503)

2,957

Reclassification from AOCI, Gains and losses on cash flow hedges tax (expense) benefit

126

(747)

Reclassification from AOCI, Gains and losses on cash flow hedges net of tax

$ (377)

$ 2,210

[1]	Amounts in parentheses indicate debits to determine net income.
[2]	These items are included in the computation of net periodic pension cost and are reported in the other components of net periodic pension and postretirement benefits expense line item on the Condensed Consolidated Statements of Income (Loss). See Note 17, Postretirement Plans, of Notes to Condensed Consolidated Financial Statements of this Form 10-Q for additional information.
[3]	Amounts are presented as an adjustment to reconcile net (loss) income to net cash provided by operating activities on the Condensed Consolidated Statements of Cash Flows.

Summary of Company's Balance Sheet Related Pension and Other Postretirement Benefit Plan (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Pension And Other Postretirement Benefit Expense [Abstract]
Current liability	$ 926	$ 29,380
Noncurrent liability	14,344	14,328
Accumulated other comprehensive loss, net of tax	$ 4,112	$ 107,678

Vesting Time-Based Restricted Stock Units (Detail) - USD ($) $ in Thousands	4 Months Ended
	Apr. 18, 2020	Apr. 20, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends at Vesting	$ 87	$ 1,233
Time-Based Restricted Stock Units \| Fiscal Year Vested 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends at Vesting	55
Income tax expense related to share-based payments	57
Fair Value at Vesting	$ 1,831

Goodwill and Other Intangible Assets (Tables)

4 Months Ended

Apr. 18, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Goodwill and Other Intangible Assets

	April 18, 2020		December 28, 2019
Goodwill	$	545,244	$	545,244
Amortizable intangible assets, net of amortization		613,565		623,107
Indefinite-lived intangible assets		127,100		127,100
Total goodwill and other intangible assets	$	1,285,909	$	1,295,451

Amortizable Intangible Assets

As of April 18, 2020 and December 28, 2019, respectively, the company had the following amounts related to amortizable intangible assets (amounts in thousands):

	April 18, 2020						December 28, 2019
Asset	Cost		Accumulated Amortization		Net Value		Cost		Accumulated Amortization		Net Value
Trademarks	$	477,193	$	59,809	$	417,384	$	477,193	$	55,746	$	421,447
Customer relationships		318,021		123,206		194,815		318,021		117,836		200,185
Non-compete agreements		5,154		4,978		176		5,154		4,954		200
Distributor relationships		4,123		2,933		1,190		4,123		2,848		1,275
Total	$	804,491	$	190,926	$	613,565	$	804,491	$	181,384	$	623,107

Aggregate Amortization Expense

Aggregate amortization expense for the sixteen weeks ended April 18, 2020 and April 20, 2019 was as follows (amounts in thousands):

Amortization

Expense

For the sixteen weeks ended April 18, 2020

9,542

For the sixteen weeks ended April 20, 2019

9,023

Estimated Amortization of Intangibles

Estimated amortization of intangibles for each of the next five years is as follows (amounts in thousands):

	Amortization of Intangibles
Remainder of 2020	$	21,250
2021	$	30,148
2022	$	29,599
2023	$	28,718
2024	$	28,022

Other Accrued Liabilities and Other Long-Term Liabilities (Tables)

4 Months Ended

Apr. 18, 2020

Other Liabilities Disclosure [Abstract]

Components of Other Accrued Liabilities

Other accrued liabilities consist of (amounts in thousands):

	April 18, 2020		December 28, 2019
Employee compensation	$	22,787	$	21,966
VSIP liabilities		—		174
Employee vacation		18,063		23,660
Employee bonus		19,521		19,476
Fair value of derivative instruments		3,634		814
Self-insurance reserves		31,243		30,294
Bank overdraft		10,237		13,767
Accrued interest		1,867		7,881
Accrued utilities		5,596		5,005
Accrued income taxes		13,882		—
Accrued other taxes		11,256		6,870
Accrued advertising		2,494		4,637
Accrued legal settlements		32,334		51,450
Accrued legal costs		3,690		1,705
Contingent acquisition consideration		—		5,000
Accrued short-term deferred income		5,170		5,337
Collateral from counterparties for derivative positions		428		1,188
Other		1,728		1,816
Total	$	183,930	$	201,040

Components of Other Long Term Liabilities

Other long-term liabilities consist of (amounts in thousands):

	April 18, 2020		December 28, 2019
Deferred income	$	22,941	$	24,840
Deferred compensation		16,553		15,558
Fair value of derivative instruments		1,222		792
Other deferred credits		1,470		1,609
Other		1,477		1,382
Total	$	43,663	$	44,181

Other Accrued Liabilities and Other Long-Term Liabilities

4 Months Ended

Apr. 18, 2020

Other Liabilities Disclosure [Abstract]

Other Accrued Liabilities and Other Long-Term Liabilities

10. OTHER ACCRUED LIABILITIES AND OTHER LONG-TERM LIABILITIES

Other accrued liabilities consist of (amounts in thousands):

	April 18, 2020		December 28, 2019
Employee compensation	$	22,787	$	21,966
VSIP liabilities		—		174
Employee vacation		18,063		23,660
Employee bonus		19,521		19,476
Fair value of derivative instruments		3,634		814
Self-insurance reserves		31,243		30,294
Bank overdraft		10,237		13,767
Accrued interest		1,867		7,881
Accrued utilities		5,596		5,005
Accrued income taxes		13,882		—
Accrued other taxes		11,256		6,870
Accrued advertising		2,494		4,637
Accrued legal settlements		32,334		51,450
Accrued legal costs		3,690		1,705
Contingent acquisition consideration		—		5,000
Accrued short-term deferred income		5,170		5,337
Collateral from counterparties for derivative positions		428		1,188
Other		1,728		1,816
Total	$	183,930	$	201,040

See Note 14, Commitments and Contingencies, of Notes to Condensed Consolidated Financial Statements of this Form 10-Q for details on the legal settlements.

Other long-term liabilities consist of (amounts in thousands):

	April 18, 2020		December 28, 2019
Deferred income	$	22,941	$	24,840
Deferred compensation		16,553		15,558
Fair value of derivative instruments		1,222		792
Other deferred credits		1,470		1,609
Other		1,477		1,382
Total	$	43,663	$	44,181

Goodwill and Other Intangible Assets

4 Months Ended

Apr. 18, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

6. GOODWILL AND OTHER INTANGIBLE ASSETS

	April 18, 2020		December 28, 2019
Goodwill	$	545,244	$	545,244
Amortizable intangible assets, net of amortization		613,565		623,107
Indefinite-lived intangible assets		127,100		127,100
Total goodwill and other intangible assets	$	1,285,909	$	1,295,451

As of April 18, 2020 and December 28, 2019, respectively, the company had the following amounts related to amortizable intangible assets (amounts in thousands):

	April 18, 2020						December 28, 2019
Asset	Cost		Accumulated Amortization		Net Value		Cost		Accumulated Amortization		Net Value
Trademarks	$	477,193	$	59,809	$	417,384	$	477,193	$	55,746	$	421,447
Customer relationships		318,021		123,206		194,815		318,021		117,836		200,185
Non-compete agreements		5,154		4,978		176		5,154		4,954		200
Distributor relationships		4,123		2,933		1,190		4,123		2,848		1,275
Total	$	804,491	$	190,926	$	613,565	$	804,491	$	181,384	$	623,107

Aggregate amortization expense for the sixteen weeks ended April 18, 2020 and April 20, 2019 was as follows (amounts in thousands):

Amortization

Expense

For the sixteen weeks ended April 18, 2020

9,542

For the sixteen weeks ended April 20, 2019

9,023

Estimated amortization of intangibles for each of the next five years is as follows (amounts in thousands):

	Amortization of Intangibles
Remainder of 2020	$	21,250
2021	$	30,148
2022	$	29,599
2023	$	28,718
2024	$	28,022

Recent Accounting Pronouncements

4 Months Ended

Apr. 18, 2020

Accounting Changes And Error Corrections [Abstract]

Recent Accounting Pronouncements

2. RECENT ACCOUNTING PRONOUNCEMENTS

Recently adopted accounting pronouncements

Accounting pronouncements not yet adopted

We have reviewed other recently issued accounting pronouncements and concluded that either they are not applicable to our business or no material effect is expected upon future adoption.

Long Term Debt (Net of Issuance Costs and Debt Discounts Excluding Line-of-credit Arrangements) (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Debt Instrument [Line Items]
Accounts receivable securitization facility	$ 49,000	$ 26,000
Other notes payable	1,245	3,730
Total debt	1,070,597	866,508
Less current maturities of long-term debt	(1,245)	(3,730)
Noncurrent long-term debt	1,069,352	862,778
Unsecured Credit Facility
Debt Instrument [Line Items]
Unsecured credit facility	225,000	41,750
2026 Notes
Debt Instrument [Line Items]
Senior notes	396,298	396,122
2022 Notes
Debt Instrument [Line Items]
Senior notes	$ 399,054	$ 398,906

Basic and Diluted Earnings per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	4 Months Ended
	Apr. 18, 2020	Apr. 20, 2019
Earnings Per Share [Abstract]
Net (loss) income	$ (5,772)	$ 65,866
Basic (Loss) Earnings Per Common Share:
Basic weighted average shares outstanding for common stock	211,754	211,388
Basic (loss) earnings per common share	$ (0.03)	$ 0.31
Diluted (Loss) Earnings Per Common Share:
Basic weighted average shares outstanding for common stock	211,754	211,388
Add: Shares of common stock assumed issued upon exercise of stock options and vesting of restricted stock		496
Diluted weighted average shares outstanding for common stock	211,754	211,884
Diluted (loss) earnings per common share	$ (0.03)	$ 0.31

Financial Contracts Hedging Commodity Risk (Detail) - Cash Flow Hedging $ in Thousands	Apr. 18, 2020 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	$ 183,182
Wheat Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	140,617
Soybean Oil Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	18,966
Natural Gas Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	11,030
Corn Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate Notional Amount	$ 12,569

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Accounts and notes receivable, allowances	$ 13,909	$ 9,473
Common stock, par value	$ 0.01	$ 0.01
Common stock, current par value	$ 0.001	$ 0.001
Common stock, authorized shares	500,000,000	500,000,000
Common stock, shares issued	228,729,585	228,729,585
Treasury stock, shares	17,167,036	17,215,514
Series A Preferred Stock
Preferred stock, par value	$ 100	$ 100
Preferred stock, shares authorized	200,000	200,000
Preferred stock, shares issued	0	0
Series B Preferred Stock
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	800,000	800,000
Preferred stock, shares issued	0	0

Debt and Other Obligations - Additional Information (Detail) - USD ($)				4 Months Ended
	Nov. 29, 2017	Sep. 28, 2016	Apr. 03, 2012	Apr. 18, 2020	Dec. 28, 2019	Sep. 27, 2019	Jul. 17, 2013
Debt Instrument [Line Items]
Debt instrument face amount				$ 801,250,000	$ 803,750,000
2026 Notes
Debt Instrument [Line Items]
Debt discount		$ 2,100,000
Payments of financing costs		3,600,000
Debt instrument face amount		$ 400,000,000.0		$ 400,000,000	400,000,000
Notes due year				Oct. 01, 2026
Debt instrument interest rate		3.50%
Price to redeem notes as a percentage of principal		100.00%
Variable interest rate		30.00%
Change of control triggering event price to redeem notes as a percentage of principal				101.00%
2022 Notes
Debt Instrument [Line Items]
Debt discount				$ 1,000,000.0
Payments of financing costs				3,900,000
Debt instrument face amount			$ 400,000,000.0	$ 400,000,000	400,000,000
Notes due year				Apr. 01, 2022
Debt instrument interest rate			4.375%
Price to redeem notes as a percentage of principal			100.00%
Variable interest rate			0.35%
Change of control triggering event price to redeem notes as a percentage of principal				101.00%
Standby Letters Of Credit
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period				$ 8,400,000	8,400,000
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period				49,000,000	26,000,000
Line of credit facility, maximum borrowing capacity				$ 200,000,000		$ 200,000,000.0	$ 150,000,000.0
Line of credit extended term				1 year
Line of credit facility, expiration date				Sep. 27, 2021
Debt instrument covenant compliance				As of April 18, 2020 and December 28, 2019, respectively, the company was in compliance with all restrictive covenants under the facility
Basis spread on variable rate				0.85%
Unused borrowing fee				0.30%
Balance of unamortized financing costs				$ 200,000	200,000
Accounts Receivable Securitization Facility \| Minimum
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period				19,000,000
Accounts Receivable Securitization Facility \| Maximum
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period				79,000,000
Unsecured Credit Facility
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period				225,000,000	41,750,000
Line of credit facility, maximum borrowing capacity				$ 500,000,000
Line of credit facility, expiration date				Nov. 29, 2022
Balance of unamortized financing costs				$ 800,000	$ 900,000
Covenant, maximum leverage ratio				4.00
Minimum leverage ratio on covenant holiday				3.75
Line of credit facility, expiration period				5 years
Line of credit facility, amount available				$ 500,000,000.0
Line of credit facility, additional borrowing capacity				200,000,000.0
Unsecured Credit Facility \| Unsecured Credit Facility Total Potential Commitment
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				700,000,000.0
Unsecured Credit Facility \| Minimum
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period				6,400,000
Unsecured Credit Facility \| Maximum
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period				$ 235,000,000
Unsecured Credit Facility \| Base Rate Loans \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%
Unsecured Credit Facility \| Base Rate Loans \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	0.575%
Unsecured Credit Facility \| Eurodollar Loans \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.575%
Unsecured Credit Facility \| Eurodollar Loans \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.575%
Unsecured Credit Facility \| Federal Funds Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.05%
Unsecured Credit Facility \| Federal Funds Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	0.30%

Aggregate Maturities of Debt Outstanding (Including Capital Leases) (Detail) $ in Thousands	Apr. 18, 2020 USD ($)
Debt Disclosure [Abstract]
Remainder of 2020	$ 1,250
2021	49,000
2022	625,000
2025 and thereafter	400,000
Total	$ 1,075,250

Components of Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Other Liabilities Disclosure [Abstract]
Employee compensation	$ 22,787	$ 21,966
VSIP liabilities		174
Employee vacation	18,063	23,660
Employee bonus	19,521	19,476
Fair value of derivative instruments	3,634	814
Self-insurance reserves	31,243	30,294
Bank overdraft	10,237	13,767
Accrued interest	1,867	7,881
Accrued utilities	5,596	5,005
Accrued income taxes	13,882
Accrued other taxes	11,256	6,870
Accrued advertising	2,494	4,637
Accrued legal settlements	32,334	51,450
Accrued legal costs	3,690	1,705
Contingent acquisition consideration		5,000
Accrued short-term deferred income	5,170	5,337
Collateral from counterparties for derivative positions	428	1,188
Other	1,728	1,816
Total	$ 183,930	$ 201,040

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	4 Months Ended
	Apr. 18, 2020	Apr. 20, 2019
Statement Of Stockholders Equity [Abstract]
Cash dividends paid per common share	$ 0.1900	$ 0.1800

Aggregate Amortization Expense (Detail) - USD ($) $ in Thousands	4 Months Ended
	Apr. 18, 2020	Apr. 20, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Aggregate amortization expense	$ 9,542	$ 9,023

Changes to AOCI, Net of Income Tax, By Component (Detail) - USD ($)
$ in Thousands

4 Months Ended

Apr. 18, 2020

Apr. 20, 2019

Accumulated Other Comprehensive Income Loss [Line Items]

$ 1,263,430

$ 1,258,267

^[1]

88,284

(530)

Accumulated Other Comprehensive Income Loss [Line Items]

1,320,611

1,267,926

Cash Flow Hedge Items

Other comprehensive income (loss) before reclassifications

1,658

(4,135)

(3,849)

(9,593)

411

(2,178)

Defined Benefit Pension Plan Items

(1,780)

(15,906)

Accumulated Other Comprehensive Income Loss [Line Items]

Other comprehensive income (loss) before reclassifications

(107,678)

(105,036)

15,693

^[1]

87,873

1,648

Accumulated Other Comprehensive Loss

(4,112)

(103,388)

Accumulated Other Comprehensive Income Loss [Line Items]

Other comprehensive income (loss) before reclassifications

(106,020)

(109,171)

11,844

(9,593)

88,284

(530)

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

$ (5,892)

$ (119,294)

[1]	Amounts in parentheses indicate debits to determine net income.

Accumulated Other Comprehensive Income ("AOCI") (Tables)

4 Months Ended

Apr. 18, 2020

Summary of Reclassifications Out of AOCI

During the sixteen weeks ended April 18, 2020 and April 20, 2019, reclassifications out of AOCI were as follows (amounts in thousands):

	Amount Reclassified from AOCI
	For the Sixteen Weeks Ended						Affected Line Item in the Statement
Details about AOCI Components (Note 2)	April 18, 2020			April 20, 2019			Where Net Income is Presented
Gains and losses on cash flow hedges:
Interest rate contracts	$	(44	)	$	(44	)	Interest expense
Commodity contracts		(503	)		2,957		Cost of sales, Note 3
Total before tax		(547	)		2,913		Total before tax
Tax benefit (expense)		136			(735	)	Income tax expense (benefit)
Total net of tax		(411	)		2,178		Net of tax
Amortization of defined benefit pension items:
Prior-service costs		(74	)		(106	)	Note 1
Settlement loss and curtailment loss		(116,207	)		—		Note 1
Actuarial losses		(1,275	)		(2,099	)	Note 1
Total before tax		(117,556	)		(2,205	)	Total before tax
Tax benefit		29,683			557		Income tax expense (benefit)
Total net of tax		(87,873	)		(1,648	)	Net of tax
Total reclassifications	$	(88,284	)	$	530		Net of tax

Note 1:

Note 2:

Amounts in parentheses indicate debits to determine net income.

Note 3:

Amounts are presented as an adjustment to reconcile net (loss) income to net cash provided by operating activities on the Condensed Consolidated Statements of Cash Flows.

Changes to AOCI, Net of Income Tax

During the sixteen weeks ended April 18, 2020, changes to AOCI, net of income tax, by component were as follows (amounts in thousands and parentheses denote a debit balance):

	Cash Flow Hedge Items			Defined Benefit Pension Plan Items			Total
AOCI at December 28, 2019	$	1,658		$	(107,678	)	$	(106,020	)
Other comprehensive income (loss) before reclassifications		(3,849	)		15,693			11,844
Reclassified to earnings from AOCI		411			87,873			88,284
AOCI at April 18, 2020	$	(1,780	)	$	(4,112	)	$	(5,892	)

During the sixteen weeks ended April 20, 2019, changes to AOCI, net of income tax, by component were as follows (amounts in thousands and parentheses denote a debit balance):

	Cash Flow Hedge Items			Defined Benefit Pension Plan Items			Total
AOCI at December 29, 2018	$	(4,135	)	$	(105,036	)	$	(109,171	)
Other comprehensive loss before reclassifications		(9,593	)		—			(9,593	)
Reclassified to earnings from AOCI		(2,178	)		1,648			(530	)
AOCI at April 20, 2019	$	(15,906	)	$	(103,388	)	$	(119,294	)

Gain (Loss) Reclassified From AOCI for Commodity Contracts

The following table presents the net of tax amount reclassified from AOCI for our commodity contracts (amounts in thousands and positive value indicates credits to determine net income):

	For the Sixteen Weeks Ended
	April 18, 2020			April 20, 2019
Gross (loss) gain reclassified from AOCI into net income	$	(503	)	$	2,957
Tax expense (benefit)		126			(747	)
Net of tax	$	(377	)	$	2,210

Other Current and Non-Current Assets (Tables)

4 Months Ended

Apr. 18, 2020

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Components of Other Current Assets

Other current assets consist of (amounts in thousands):

	April 18, 2020		December 28, 2019
Prepaid assets	$	16,339	$	15,380
Recovery from legal settlement in principle		—		22,300
Fair value of derivative instruments		1,942		3,191
Collateral to counterparties for derivative positions		13,432		7,012
Income taxes receivable		602		13,924
Other		1,780		946
Total	$	34,095	$	62,753

Components of Other Non-Current Assets

Other non-current assets consist of (amounts in thousands):

	April 18, 2020		December 28, 2019
Unamortized financing fees	$	952	$	1,084
Investments		2,972		3,496
Fair value of derivative instruments		704		589
Deposits		2,158		1,998
Unamortized cloud computing arrangement costs		838		929
Other		132		140
Total	$	7,756	$	8,236

Postretirement Plans - Additional Information (Detail) - USD ($)	3 Months Ended	4 Months Ended
	Oct. 03, 2020	Apr. 18, 2020	Apr. 20, 2019	Mar. 31, 2020
Plan No. 1
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined benefit plan assets, transferred		$ 6,400,000
Voluntarily contributions made by an employer		1,400,000	$ 0
Defined benefit plan, loan issued		5,000,000.0		$ 5,000,000.0
Defined benefit plans non-cash settlement charge		116,200,000
Settlement loss		111,900,000	0
Defined benefit plan obligation, curtailment loss		4,300,000
Plan No. 2 \| Scenario Forecast
Pension and Other Postretirement Benefits Disclosure [Line Items]
Voluntarily contributions made by an employer	$ 2,500,000
401(k) Retirement Savings Plans
Pension and Other Postretirement Benefits Disclosure [Line Items]
Total cost and employer contributions		$ 8,600,000	$ 8,500,000

Stock-Based Compensation (Deferred Stock) - Additional Information (Detail) - shares	4 Months Ended	9 Months Ended	12 Months Ended
	Apr. 18, 2020	Oct. 05, 2019	Dec. 29, 2018
Deferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares vested	2,000
Annual Grants \| Deferred Stock \| Non Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares elected to receive	6,934	46,240
Annual Grants \| Deferred Stock \| Non Employee Directors \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Retainer Conversion
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Retainers conversion into deferred shares	100.00%
Vesting period	1 year
Previous Director Retainer Deferrals \| Deferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares vested	4,660
Common shares issued	4,660
Director Retainer Deferrals \| Omnibus Plan \| Deferred Stock \| Non Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares elected to receive	2,299

Fair Value of Financial Instruments

4 Months Ended

Apr. 18, 2020

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

7. FAIR VALUE OF FINANCIAL INSTRUMENTS

Interest income was primarily related to the IDPs’ notes receivable and was as follows (amounts in thousands):

Interest

Income

For the sixteen weeks ended April 18, 2020

8,325

For the sixteen weeks ended April 20, 2019

8,647

At April 18, 2020 and December 28, 2019, respectively, the carrying value of the distributor notes receivable was as follows (amounts in thousands):

	April 18, 2020		December 28, 2019
Distributor notes receivable	$	221,144	$	226,348
Current portion of distributor notes receivable recorded in accounts and notes receivable, net		28,018		27,709
Long-term portion of distributor notes receivable	$	193,126	$	198,639

	Carrying Value		Fair Value		Level
2026 notes	$	396,298	$	414,436	2
2022 notes	$	399,054	$	413,692	2

Restructuring Activities

4 Months Ended

Apr. 18, 2020

Restructuring And Related Activities [Abstract]

Restructuring Activities

3. RESTRUCTURING ACTIVITIES

	For the Sixteen Weeks Ended
	April 18, 2020
Restructuring and related impairment charges:
Reorganization costs	$	—
Impairment of assets		—
Employee termination benefits		—
Restructuring and related impairment charges (1)		—
Project Centennial implementation costs (2)		3,392
Total Project Centennial restructuring and implementation costs	$	3,392

	For the Sixteen Weeks Ended
	April 20, 2019
Restructuring and related impairment charges:
Reorganization costs	$	211
Impairment of assets		530
Employee termination benefits		(23	)
Total Project Centennial restructuring costs (1)	$	718

(1)	Presented on our Condensed Consolidated Statements of Income (Loss).

(2)	Costs are recorded in the selling, distribution and administrative expenses line item of our Condensed Consolidated Statements of Income (Loss).

The tables below present the components of, and changes in, our restructuring accruals for the sixteen weeks ended April 18, 2020 and April 20, 2019 (amounts in thousands):

	VSIP			Employee Termination Benefits⁽¹⁾			Reorganization Costs⁽²⁾		Total
Liability balance at December 28, 2019	$	174		$	1,450		$	—	$	1,624
Charges		—			—			—		—
Cash payments		(174	)		(851	)		—		(1,025	)
Liability balance (3) at April 18, 2020	$	—		$	599		$	—	$	599

	VSIP		Employee Termination Benefits⁽¹⁾			Reorganization Costs⁽²⁾			Total
Liability balance at December 29, 2018	$	174	$	227		$	—		$	401
Charges		—		(23	)		211			188
Cash payments		—		(204	)		(211	)		(415	)
Liability balance (3) at April 20, 2019	$	174	$	—		$	—		$	174

(1)	Employee termination benefits are not related to the VSIP.

(2)	Reorganization costs include employee relocation expenses.

(3)	Recorded in the other accrued current liabilities line item of our Condensed Consolidated Balance Sheets.

Assets Held for Sale

4 Months Ended

Apr. 18, 2020

Property Plant And Equipment Assets Held For Sale Disclosure [Abstract]

Assets Held for Sale

11. ASSETS HELD FOR SALE

	April 18, 2020		December 28, 2019
Distributor territories	$	3,988	$	3,016
Property, plant and equipment		8,341		1,392
Total assets held for sale	$	12,329	$	4,408

Subsequent Events

4 Months Ended

Apr. 18, 2020

Subsequent Events [Abstract]

Subsequent Events

19. SUBSEQUENT EVENTS

Earnings Per Share

4 Months Ended

Apr. 18, 2020

Earnings Per Share [Abstract]

Earnings Per Share

15. EARNINGS PER SHARE

	For the Sixteen Weeks Ended
	April 18, 2020			April 20, 2019
Net (loss) income	$	(5,772	)	$	65,866
Basic (Loss) Earnings Per Common Share:
Basic weighted average shares outstanding for common stock		211,754			211,388
Basic (loss) earnings per common share	$	(0.03	)	$	0.31
Diluted (Loss) Earnings Per Common Share:
Basic weighted average shares outstanding for common stock		211,754			211,388
Add: Shares of common stock assumed issued upon exercise of stock options and vesting of restricted stock		—			496
Diluted weighted average shares outstanding for common stock		211,754			211,884
Diluted (loss) earnings per common share	$	(0.03	)	$	0.31

There were 324,240 and 438,630 anti-dilutive shares during the sixteen weeks ended April 18, 2020 and April 20, 2019, respectively.

Net Fair Value of Commodity Price Risk (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Assets	$ 2,646	$ 3,780
Liabilities	(4,856)	(1,606)
Net Fair Value	(2,210)	2,174
Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	2,646	3,780
Liabilities	(4,856)	(1,606)
Net Fair Value	(2,210)	2,174
Other Current Assets
Derivative Instruments, Gain (Loss) [Line Items]
Assets	1,942	3,191
Other Current Assets \| Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	1,942	3,191
Other LongTerm Assets
Derivative Instruments, Gain (Loss) [Line Items]
Assets	704	589
Other LongTerm Assets \| Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Assets	704	589
Other Current Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(3,634)	(814)
Other Current Liabilities \| Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(3,634)	(814)
Other LongTerm Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	(1,222)	(792)
Other LongTerm Liabilities \| Level 1
Derivative Instruments, Gain (Loss) [Line Items]
Liabilities	$ (1,222)	$ (792)

Performance Contingent ROIC Shares (Detail) - Return On Invested Capital - Twenty Nineteen Award - Omnibus Plan - $ / shares shares in Thousands				12 Months Ended
	Oct. 06, 2019	Jul. 14, 2019	May 23, 2019	Dec. 28, 2019	Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	2	5	11	331	440
Vesting Date	Mar. 01, 2022	Mar. 01, 2022	Mar. 01, 2022	Feb. 28, 2023	Mar. 01, 2022
Fair Value per Share	$ 22.52	$ 23.32	$ 23.08	$ 21.74	$ 18.29

Stock-Based Compensation (Performance-Contingent Total Shareholder Return Shares) - Additional Information (Detail) - shares		4 Months Ended
	May 23, 2019	Apr. 18, 2020
Performance Contingent Total Shareholders Return Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Shares, Forfeited	112,840
Total Shareholders Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, fair value assumptions, method used		Inputs into the model included the following for the company and comparator companies: (i) TSR from the beginning of the performance cycle through the measurement date; (ii) volatility; (iii) risk-free interest rates; and (iv) the correlation of the comparator companies’ TSR. The inputs are based on historical capital market data.
Total Shareholders Return \| Fiscal 2019 \| 2017 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of vested shares		153.00%
Awards vested during period		0

Interest Income Primarily Related to IDPs Notes Receivable (Detail) - USD ($) $ in Thousands	4 Months Ended
	Apr. 18, 2020	Apr. 20, 2019
Fair Value Disclosures [Abstract]
Interest Income	$ 8,325	$ 8,647

Stock-Based Compensation (Time-Based Restricted Stock Units) - Additional Information (Detail) - Time-Based Restricted Stock Units - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		4 Months Ended	12 Months Ended
	May 23, 2019	Apr. 18, 2020	Dec. 28, 2019	Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares issued		219
Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting date		--01-05
Vesting period		3 years	3 years	3 years
Restricted shares issued	43		219	244
Fair Value per Share	$ 23.08		$ 21.74	$ 18.29
Omnibus Plan \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted	$ 1.0
Restricted shares issued	43,330
Fair Value per Share	$ 23.08
Vesting term		This award will vest 100% on the fourth anniversary of the date of grant provided the CEO remains employed by the company during this period. Vesting will also occur in the event of the CEO’s death or disability, but not his retirement if prior to the fourth anniversary of the grant date.

Accumulated Other Comprehensive Loss (Income) Related to Derivative Transactions (Detail) - USD ($)
$ in Thousands

4 Months Ended

Apr. 18, 2020

Apr. 20, 2019

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) [Line Items]

^[1]

$ (3,849)

$ (9,593)

Closed Contracts

Estimated amount of derivatives to be reclassified in income from AOCI

(123)

Closed Contracts | Commodity price risk derivatives

Derivative Instruments, Gain (Loss) [Line Items]

Estimated amount of derivatives to be reclassified in income from AOCI

(278)

Closed Contracts | Interest rate risk derivatives

Derivative Instruments, Gain (Loss) [Line Items]

Estimated amount of derivatives to be reclassified in income from AOCI

155

Expiring in 2020

Derivative Instruments, Gain (Loss) [Line Items]

Expiring in 2020 | Commodity price risk derivatives

(1,620)

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) [Line Items]

(1,620)

Expiring in 2021

Expiring in 2021 | Commodity price risk derivatives

169

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) [Line Items]

169

Expiring in 2022

Expiring in 2022 | Commodity price risk derivatives

(206)

Derivative Instruments, Gain (Loss) [Line Items]

Closed or Expiring Over Next Four Years

(206)

Derivative Instruments, Gain (Loss) [Line Items]

Closed or Expiring Over Next Four Years | Commodity price risk derivatives

(1,780)

Derivative Instruments, Gain (Loss) [Line Items]

Closed or Expiring Over Next Four Years | Interest rate risk derivatives

(1,935)

Derivative Instruments, Gain (Loss) [Line Items]

Summary of Company's Balance Sheet Related Pension and Other Postretirement Benefit Plan

$ 155

[1]	Amounts in parentheses indicate debits to determine net income.

Postretirement Plans (Tables)

4 Months Ended

Apr. 18, 2020

	April 18, 2020		December 28, 2019
Current liability	$	926	$	29,380
Noncurrent liability	$	14,344	$	14,328
Accumulated other comprehensive loss, net of tax	$	4,112	$	107,678

Pension plans

Components of Net Periodic Benefit / Cost

The net periodic pension cost for the company’s plans include the following components (amounts in thousands):

	For the Sixteen Weeks Ended
	April 18, 2020			April 20, 2019
Service cost	$	265		$	216
Interest cost		1,423			3,671
Expected return on plan assets		(2,689	)		(5,276	)
Settlement and curtailment loss		116,207			—
Amortization of prior service cost		75			119
Amortization of net loss		1,367			2,184
Total net periodic pension cost	$	116,648		$	914

Postretirement Benefit Plan

Components of Net Periodic Benefit / Cost

The net periodic postretirement expense for the company includes the following components (amounts in thousands):

	For the Sixteen Weeks Ended
	April 18, 2020			April 20, 2019
Service cost	$	87		$	87
Interest cost		60			91
Amortization of prior service credit		(1	)		(13	)
Amortization of net gain		(92	)		(85	)
Total net periodic postretirement cost	$	54		$	80

Restructuring Activities - Additional Information (Detail) $ in Thousands						4 Months Ended
	Jul. 02, 2018 Segment	Sep. 25, 2017 Employee	Sep. 07, 2017	Jul. 17, 2017	May 03, 2017 BusinessUnit	Apr. 18, 2020	Apr. 20, 2019 USD ($)
Restructuring Cost And Reserve [Line Items]
Impairment charges							$ 530
Manufacturing Lines
Restructuring Cost And Reserve [Line Items]
Impairment charges							$ 500
Develop Leading Capabilities
Restructuring Cost And Reserve [Line Items]
Number of operating segments \| Segment	1
Launch of Project Centennial
Restructuring Cost And Reserve [Line Items]
Restructuring activities, expected completion year						2021
Launch of Project Centennial \| Develop Leading Capabilities
Restructuring Cost And Reserve [Line Items]
Number of new organizational structure business units established \| BusinessUnit					2
Launch of Project Centennial \| Employee Severance \| Voluntary Employee Separation Incentive Plan
Restructuring Cost And Reserve [Line Items]
Voluntary employee separation incentive plan commencement date				Jul. 17, 2017
Election period closing date		Sep. 25, 2017
Approximate number of employees accepted offer \| Employee		325
Separations beginning date			Sep. 07, 2017

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Additional indefinite lived intangible assets separately identified from goodwill	$ 127,100	$ 127,100

Summary of Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 545,244	$ 545,244
Amortizable intangible assets, net of amortization	613,565	623,107
Indefinite-lived intangible assets	127,100	127,100
Total goodwill and other intangible assets	$ 1,285,909	$ 1,295,451

Leases - Estimated Undiscounted Future Lease Payments Under Non-Cancelable Operating Leases and Financing Leases with Reconciliation of Undiscounted Cash Flows (Detail) - USD ($) $ in Thousands	Apr. 18, 2020	Dec. 28, 2019
Operating lease liabilities
Remainder of 2020	$ 51,365
2021	60,829
2022	49,957
2023	44,780
2024	37,283
2025 and thereafter	211,563
Total minimum lease payments	455,777
Less: amount of lease payments representing interest	(86,265)
Present value of future minimum lease payments	369,512
Less: current obligations under leases	(53,030)	$ (52,806)
Long-term lease obligations	316,482	324,131
Financing lease liabilities
Remainder of 2020	6,679
2021	6,781
2022	5,476
2023	6,505
2024	1,501
2025 and thereafter	715
Total minimum lease payments	27,657
Less: amount of lease payments representing interest	(1,800)
Present value of future minimum lease payments	25,857
Less: current obligations under leases	(7,789)	(8,176)
Long-term lease obligations	$ 18,068	$ 19,390

Basis of Presentation

4 Months Ended

Apr. 18, 2020

Accounting Policies [Abstract]

Basis of Presentation

1. BASIS OF PRESENTATION

	For the Sixteen Weeks Ended
	April 18, 2020		April 20, 2019
	(% of Sales)
Total		21.4		20.5

Allowance at December 28, 2019	$	2,089
Amounts charged to expense		4,668
Write-offs		—
Recoveries and other		(1,082	)
Allowance at April 18, 2020	$	5,675

RECOVERY ON INFERIOR INGREDIENTS

Document and Entity Information - shares	4 Months Ended
Document and Entity Information - shares	Apr. 18, 2020	May 08, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 18, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Trading Symbol	FLO
Title of 12(b) Security	Common Stock
Security Exchange Name	NYSE
Entity Registrant Name	FLOWERS FOODS, INC
Entity Central Index Key	0001128928
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	1-16247
Entity Tax Identification Number	58-2582379
Entity Address, Address Line One	1919 FLOWERS CIRCLE
Entity Address, City or Town	THOMASVILLE
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	31757
City Area Code	229
Local Phone Number	226-9110
Entity Incorporation, State or Country Code	2Q
Current Fiscal Year End Date	--01-02
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		211,573,765

Other Current and Non-Current Assets - Additional Information (Detail) $ in Millions	4 Months Ended
	Apr. 18, 2020 USD ($) Lawsuits
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Insurance legal settlement \| $	$ 22.3
Number of lawsuits \| Lawsuits	2

Schedule of Net Amount Available Under Facility (Detail) - USD ($)	Apr. 18, 2020	Dec. 28, 2019	Sep. 27, 2019	Jul. 17, 2013
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Gross amount available	$ 200,000,000		$ 200,000,000.0	$ 150,000,000.0
Outstanding	(49,000,000)	$ (26,000,000)
Available for withdrawal	151,000,000
Unsecured Credit Facility
Debt Instrument [Line Items]
Gross amount available	500,000,000
Outstanding	(225,000,000)	$ (41,750,000)
Letters of credit	(8,400,000)
Available for withdrawal	$ 266,600,000

Variable Interest Entities - Additional Information (Detail) - USD ($) $ in Millions	Apr. 18, 2020	Dec. 28, 2019
VIE
Variable Interest Entity [Line Items]
Gross distribution rights notes receivable	$ 181.6	$ 183.2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	4 Months Ended
	Apr. 18, 2020	Apr. 20, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (5,772)	$ 65,866
Pension and postretirement plans:
Settlement and curtailment loss	86,865
Net gain for the period	15,693
Amortization of prior service cost included in net income	55	79
Amortization of actuarial loss included in net income	953	1,569
Pension and postretirement plans, net of tax	103,566	1,648
Derivative instruments:
Net change in fair value of derivatives	(3,849)	(9,593)
Loss (gain) reclassified to net income	411	(2,178)
Derivative instruments, net of tax	(3,438)	(11,771)
Other comprehensive income (loss), net of tax	100,128	(10,123)
Comprehensive income	$ 94,356	$ 55,743

Assets Held for Sale - Additional Information (Detail)	4 Months Ended
Assets Held for Sale - Additional Information (Detail)	Apr. 18, 2020 Bakery
Property Plant And Equipment [Abstract]
Number of closed bakeries reclassified as held for sale	2

Other Current and Non-Current Assets

4 Months Ended

Apr. 18, 2020

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Other Current and Non-Current Assets

9. OTHER CURRENT AND NON-CURRENT ASSETS

Other current assets consist of (amounts in thousands):

	April 18, 2020		December 28, 2019
Prepaid assets	$	16,339	$	15,380
Recovery from legal settlement in principle		—		22,300
Fair value of derivative instruments		1,942		3,191
Collateral to counterparties for derivative positions		13,432		7,012
Income taxes receivable		602		13,924
Other		1,780		946
Total	$	34,095	$	62,753

Other non-current assets consist of (amounts in thousands):

	April 18, 2020		December 28, 2019
Unamortized financing fees	$	952	$	1,084
Investments		2,972		3,496
Fair value of derivative instruments		704		589
Deposits		2,158		1,998
Unamortized cloud computing arrangement costs		838		929
Other		132		140
Total	$	7,756	$	8,236

Accumulated Other Comprehensive Income ("AOCI")

4 Months Ended

Apr. 18, 2020

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Accumulated Other Comprehensive Income ("AOCI")

5. ACCUMULATED OTHER COMPREHENSIVE INCOME (“AOCI”)

During the sixteen weeks ended April 18, 2020 and April 20, 2019, reclassifications out of AOCI were as follows (amounts in thousands):

	Amount Reclassified from AOCI
	For the Sixteen Weeks Ended						Affected Line Item in the Statement
Details about AOCI Components (Note 2)	April 18, 2020			April 20, 2019			Where Net Income is Presented
Gains and losses on cash flow hedges:
Interest rate contracts	$	(44	)	$	(44	)	Interest expense
Commodity contracts		(503	)		2,957		Cost of sales, Note 3
Total before tax		(547	)		2,913		Total before tax
Tax benefit (expense)		136			(735	)	Income tax expense (benefit)
Total net of tax		(411	)		2,178		Net of tax
Amortization of defined benefit pension items:
Prior-service costs		(74	)		(106	)	Note 1
Settlement loss and curtailment loss		(116,207	)		—		Note 1
Actuarial losses		(1,275	)		(2,099	)	Note 1
Total before tax		(117,556	)		(2,205	)	Total before tax
Tax benefit		29,683			557		Income tax expense (benefit)
Total net of tax		(87,873	)		(1,648	)	Net of tax
Total reclassifications	$	(88,284	)	$	530		Net of tax

Note 1:

Note 2:

Amounts in parentheses indicate debits to determine net income.

Note 3:

Amounts are presented as an adjustment to reconcile net (loss) income to net cash provided by operating activities on the Condensed Consolidated Statements of Cash Flows.

During the sixteen weeks ended April 18, 2020, changes to AOCI, net of income tax, by component were as follows (amounts in thousands and parentheses denote a debit balance):

	Cash Flow Hedge Items			Defined Benefit Pension Plan Items			Total
AOCI at December 28, 2019	$	1,658		$	(107,678	)	$	(106,020	)
Other comprehensive income (loss) before reclassifications		(3,849	)		15,693			11,844
Reclassified to earnings from AOCI		411			87,873			88,284
AOCI at April 18, 2020	$	(1,780	)	$	(4,112	)	$	(5,892	)

During the sixteen weeks ended April 20, 2019, changes to AOCI, net of income tax, by component were as follows (amounts in thousands and parentheses denote a debit balance):

	Cash Flow Hedge Items			Defined Benefit Pension Plan Items			Total
AOCI at December 29, 2018	$	(4,135	)	$	(105,036	)	$	(109,171	)
Other comprehensive loss before reclassifications		(9,593	)		—			(9,593	)
Reclassified to earnings from AOCI		(2,178	)		1,648			(530	)
AOCI at April 20, 2019	$	(15,906	)	$	(103,388	)	$	(119,294	)

	For the Sixteen Weeks Ended
	April 18, 2020			April 20, 2019
Gross (loss) gain reclassified from AOCI into net income	$	(503	)	$	2,957
Tax expense (benefit)		126			(747	)
Net of tax	$	(377	)	$	2,210

Restructuring Activities (Tables)

4 Months Ended

Apr. 18, 2020

Restructuring And Related Activities [Abstract]

Components of Costs Associated with Project Centennial

	For the Sixteen Weeks Ended
	April 18, 2020
Restructuring and related impairment charges:
Reorganization costs	$	—
Impairment of assets		—
Employee termination benefits		—
Restructuring and related impairment charges (1)		—
Project Centennial implementation costs (2)		3,392
Total Project Centennial restructuring and implementation costs	$	3,392

	For the Sixteen Weeks Ended
	April 20, 2019
Restructuring and related impairment charges:
Reorganization costs	$	211
Impairment of assets		530
Employee termination benefits		(23	)
Total Project Centennial restructuring costs (1)	$	718

(1)	Presented on our Condensed Consolidated Statements of Income (Loss).

(2)	Costs are recorded in the selling, distribution and administrative expenses line item of our Condensed Consolidated Statements of Income (Loss).

Components of, and Changes in Restructuring Accruals

The tables below present the components of, and changes in, our restructuring accruals for the sixteen weeks ended April 18, 2020 and April 20, 2019 (amounts in thousands):

	VSIP			Employee Termination Benefits⁽¹⁾			Reorganization Costs⁽²⁾		Total
Liability balance at December 28, 2019	$	174		$	1,450		$	—	$	1,624
Charges		—			—			—		—
Cash payments		(174	)		(851	)		—		(1,025	)
Liability balance (3) at April 18, 2020	$	—		$	599		$	—	$	599

	VSIP		Employee Termination Benefits⁽¹⁾			Reorganization Costs⁽²⁾			Total
Liability balance at December 29, 2018	$	174	$	227		$	—		$	401
Charges		—		(23	)		211			188
Cash payments		—		(204	)		(211	)		(415	)
Liability balance (3) at April 20, 2019	$	174	$	—		$	—		$	174

(1)	Employee termination benefits are not related to the VSIP.

(2)	Reorganization costs include employee relocation expenses.

(3)	Recorded in the other accrued current liabilities line item of our Condensed Consolidated Balance Sheets.

Income Taxes - Additional Information (Detail)	4 Months Ended
Income Taxes - Additional Information (Detail)	Apr. 18, 2020	Apr. 20, 2019
Income Tax Disclosure [Abstract]
Effective tax rate	25.90%	23.50%

Fair Value of Financial Instruments (Tables)

4 Months Ended

Apr. 18, 2020

Fair Value Disclosures [Abstract]

Interest Income Primarily Related to IDPs Notes Receivable

Interest income was primarily related to the IDPs’ notes receivable and was as follows (amounts in thousands):

Interest

Income

For the sixteen weeks ended April 18, 2020

8,325

For the sixteen weeks ended April 20, 2019

8,647

Carrying Value of Distributor Notes Receivable

At April 18, 2020 and December 28, 2019, respectively, the carrying value of the distributor notes receivable was as follows (amounts in thousands):

	April 18, 2020		December 28, 2019
Distributor notes receivable	$	221,144	$	226,348
Current portion of distributor notes receivable recorded in accounts and notes receivable, net		28,018		27,709
Long-term portion of distributor notes receivable	$	193,126	$	198,639

Schedule of Fair Value of Notes

The fair value of the 2026 notes and 2022 notes are presented in the table below (amounts in thousands, except level classification):

	Carrying Value		Fair Value		Level
2026 notes	$	396,298	$	414,436	2
2022 notes	$	399,054	$	413,692	2

Summary of Company's Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	4 Months Ended
	Apr. 18, 2020	Apr. 20, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	$ 3,894	$ 3,179
Performance Contingent Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	2,614	2,356
Time-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	947	448
Deferred Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation	$ 333	$ 375

Assets Held for Sale (Tables)

4 Months Ended

Apr. 18, 2020

Property Plant And Equipment Assets Held For Sale Disclosure [Abstract]

Assets Held for Sale

The table below presents the assets held for sale as of April 18, 2020 and December 28, 2019, respectively (amounts in thousands):

	April 18, 2020		December 28, 2019
Distributor territories	$	3,988	$	3,016
Property, plant and equipment		8,341		1,392
Total assets held for sale	$	12,329	$	4,408

Time-Based Restricted Stock Units Activity (Detail) - Time-Based Restricted Stock Units $ / shares in Units, shares in Thousands, $ in Thousands	4 Months Ended
	Apr. 18, 2020 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Balance at beginning of period \| shares	270
Shares, Vested \| shares	(74)
Shares, Granted \| shares	219
Shares, Forfeitures \| shares	(15)
Shares, Balance at end of period \| shares	400
Weighted Average Fair Value, Balance at beginning of period \| $ / shares	$ 19.06
Weighted Average Fair Value, Vested \| $ / shares	18.29
Weighted Average Fair Value, Granted \| $ / shares	21.74
Weighted Average Fair Value, Forfeitures \| $ / shares	20.22
Weighted Average Fair Value, Balance at end of period \| $ / shares	$ 20.63
Weighted Average Remaining Contractual Term (Years)	2 years 5 months 8 days
Unrecognized Compensation Cost \| $	$ 7,144

Basis of Presentation (Tables)

4 Months Ended

Apr. 18, 2020

Accounting Policies [Abstract]

Effect of Largest Customer on Sales

Below is the effect that our largest customer, Walmart/Sam’s Club, had on the company’s sales for the sixteen weeks ended April 18, 2020 and April 20, 2019. Walmart/Sam’s Club is the only customer to account for greater than 10% of the company’s sales.

	For the Sixteen Weeks Ended
	April 18, 2020		April 20, 2019
	(% of Sales)
Total		21.4		20.5

Allowance for Trade Accounts Receivable Credit Losses Activity

Activity in the allowance for trade accounts receivable credit losses for the sixteen weeks ended April 18, 2020 was as follows (amounts in thousands):

Allowance at December 28, 2019	$	2,089
Amounts charged to expense		4,668
Write-offs		—
Recoveries and other		(1,082	)
Allowance at April 18, 2020	$	5,675

Postretirement Plans

4 Months Ended

Apr. 18, 2020

Compensation And Retirement Disclosure [Abstract]

Postretirement Plans

17. POSTRETIREMENT PLANS

	April 18, 2020		December 28, 2019
Current liability	$	926	$	29,380
Noncurrent liability	$	14,344	$	14,328
Accumulated other comprehensive loss, net of tax	$	4,112	$	107,678

Defined Benefit Plans and Nonqualified Plan

The company used a measurement date of December 31, 2019 for the defined benefit and postretirement benefit plans described below.

The net periodic pension cost for the company’s plans include the following components (amounts in thousands):

	For the Sixteen Weeks Ended
	April 18, 2020			April 20, 2019
Service cost	$	265		$	216
Interest cost		1,423			3,671
Expected return on plan assets		(2,689	)		(5,276	)
Settlement and curtailment loss		116,207			—
Amortization of prior service cost		75			119
Amortization of net loss		1,367			2,184
Total net periodic pension cost	$	116,648		$	914

Postretirement Benefit Plan

The net periodic postretirement expense for the company includes the following components (amounts in thousands):

	For the Sixteen Weeks Ended
	April 18, 2020			April 20, 2019
Service cost	$	87		$	87
Interest cost		60			91
Amortization of prior service credit		(1	)		(13	)
Amortization of net gain		(92	)		(85	)
Total net periodic postretirement cost	$	54		$	80

401(k) Retirement Savings Plan

Variable Interest Entities

4 Months Ended

Apr. 18, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Variable Interest Entities

13. VARIABLE INTEREST ENTITIES

Distribution rights agreement VIE analysis

The incorporated IDPs qualify as VIEs. The IDPs who are formed as sole proprietorships are excluded from the following VIE accounting analysis and discussion.

Earnings Per Share (Tables)

4 Months Ended

Apr. 18, 2020

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Common Share

	For the Sixteen Weeks Ended
	April 18, 2020			April 20, 2019
Net (loss) income	$	(5,772	)	$	65,866
Basic (Loss) Earnings Per Common Share:
Basic weighted average shares outstanding for common stock		211,754			211,388
Basic (loss) earnings per common share	$	(0.03	)	$	0.31
Diluted (Loss) Earnings Per Common Share:
Basic weighted average shares outstanding for common stock		211,754			211,388
Add: Shares of common stock assumed issued upon exercise of stock options and vesting of restricted stock		—			496
Diluted weighted average shares outstanding for common stock		211,754			211,884
Diluted (loss) earnings per common share	$	(0.03	)	$	0.31

Effect of Largest Customer on Sales (Detail)	4 Months Ended
Effect of Largest Customer on Sales (Detail)	Apr. 18, 2020	Apr. 20, 2019
Total year to date sales \| Wal-Mart/Sam's Club \| Customer Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	21.40%	20.50%

Components of, and Changes in Restructuring Accruals (Detail) - USD ($)
$ in Thousands

4 Months Ended

Apr. 18, 2020

Apr. 20, 2019

Liability balance, beginning balance

$ 1,624

$ 401

Charges

188

Liability balance, ending balance

(1,025)

(415)

^[1]

599

174

VSIP

Liability balance, beginning balance

174

Liability balance, ending balance

(174)

^[1]

174

Employee Termination Benefits

Liability balance, beginning balance

^[2]

1,450

227

Charges

^[2]

(23)

Liability balance, ending balance

^[2]

(851)

(204)

^[1],[2]

$ 599

Reorganization Costs

Charges

^[3]

211