Revenue Recognition - Schedule of Disaggregation of Revenue According to Sales Mix for Principal Product Categories (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 6,152,784	$ 6,204,194	$ 18,133,796	$ 18,151,273
Meats and seafood
Disaggregation of Revenue [Line Items]
Net sales	2,197,598	2,284,793	6,483,493	6,572,115
Dry grocery products
Disaggregation of Revenue [Line Items]
Net sales	1,070,276	1,073,266	3,181,471	3,199,275
Refrigerated and frozen grocery products
Disaggregation of Revenue [Line Items]
Net sales	979,150	947,235	2,896,108	2,821,887
Dairy
Disaggregation of Revenue [Line Items]
Net sales	646,072	652,775	1,905,682	1,895,589
Equipment, disposables and supplies
Disaggregation of Revenue [Line Items]
Net sales	594,379	577,535	1,722,100	1,689,571
Beverage products
Disaggregation of Revenue [Line Items]
Net sales	336,787	331,220	990,905	982,327
Produce
Disaggregation of Revenue [Line Items]
Net sales	$ 328,522	$ 337,370	$ 954,037	$ 990,509