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Reporting Segment Information - Schedule of Segment Reporting Information, by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Jan. 02, 2021	Oct. 03, 2020	Jul. 11, 2020	Dec. 28, 2019	Oct. 05, 2019	Jul. 13, 2019	Apr. 18, 2020	Apr. 20, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Segment Reporting Information [Line Items]
Net sales	$ 2,247,112	$ 2,060,816	$ 2,184,101	$ 1,997,953	$ 1,999,808	$ 1,995,929	$ 2,856,456	$ 2,542,375	$ 9,348,485	$ 8,536,065	$ 8,064,552
Merger/acquisition and integration (gains)									421	1,437	4,937
Restructuring, asset impairment and other charges (gains)	3,943	$ 6,543	$ 3,675	2,835	$ 1,296	$ 14,581	$ 10,237	$ (5,662)	24,398	13,050	37,546
Depreciation and amortization									89,876	88,401	82,853
Operating earnings (loss)									102,406	56,942	70,512
Capital expenditures									67,298	74,815	71,495
Total Assets	2,277,391			2,275,609					2,277,391	2,275,609
Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Total Assets				3,090						3,090
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales									9,348,485	8,536,065	8,064,552
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales									1,125,471	976,372	842,934
Food Distribution [Member]
Segment Reporting Information [Line Items]
Net sales									4,577,178	3,982,609	3,991,450
Merger/acquisition and integration (gains)										(122)	3,581
Restructuring, asset impairment and other charges (gains)									21,085	14,844	33,056
Depreciation and amortization									32,289	33,396	32,073
Operating earnings (loss)									45,962	47,416	48,752
Capital expenditures									25,055	28,385	33,271
Total Assets	1,112,961			1,087,307					1,112,961	1,087,307
Food Distribution [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales									4,577,178	3,982,609	3,991,450
Food Distribution [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales									1,125,112	976,372	842,934
Retail [Member]
Segment Reporting Information [Line Items]
Net sales									2,637,917	2,381,349	1,906,259
Merger/acquisition and integration (gains)									421	1,559	1,352
Restructuring, asset impairment and other charges (gains)									3,313	(1,794)	5,291
Depreciation and amortization									45,199	43,171	38,812
Operating earnings (loss)									66,359	18,842	16,113
Capital expenditures									33,894	40,135	34,694
Total Assets	763,876			794,413					763,876	794,413
Retail [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales									2,637,917	2,381,349	1,906,259
Retail [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales									359
Military [Member]
Segment Reporting Information [Line Items]
Net sales									2,133,390	2,172,107	2,166,843
Merger/acquisition and integration (gains)											4
Restructuring, asset impairment and other charges (gains)											(801)
Depreciation and amortization									12,388	11,834	11,968
Operating earnings (loss)									(9,915)	(9,316)	5,647
Capital expenditures									8,349	6,295	3,530
Total Assets	$ 400,554			$ 390,799					400,554	390,799
Military [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales									$ 2,133,390	$ 2,172,107	$ 2,166,843

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