Schedule of Disaggregation of Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 5,848	$ 6,531	$ 16,747	$ 19,005
Meats and seafood
Disaggregation of Revenue [Line Items]
Net sales	2,069	2,352	5,989	6,849
Dry grocery products
Disaggregation of Revenue [Line Items]
Net sales	992	1,100	2,866	3,254
Refrigerated and frozen grocery products
Disaggregation of Revenue [Line Items]
Net sales	891	1,054	2,626	3,076
Dairy
Disaggregation of Revenue [Line Items]
Net sales	636	689	1,738	1,955
Equipment, disposables and supplies
Disaggregation of Revenue [Line Items]
Net sales	638	628	1,768	1,822
Beverage products
Disaggregation of Revenue [Line Items]
Net sales	309	352	876	1,029
Produce
Disaggregation of Revenue [Line Items]
Net sales	$ 313	$ 356	$ 884	$ 1,020