Property and Equipment Summary of Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 28, 2019	Dec. 29, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,373	$ 3,959
Less accumulated depreciation and amortization	(2,298)	(2,117)
Property and equipment—net	$ 2,075	1,842
Minimum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	3 years
Maximum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	40 years
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 378	323
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,411	1,252
Buildings and building improvements \| Minimum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	10 years
Buildings and building improvements \| Maximum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	40 years
Transportation equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,137	1,031
Transportation equipment \| Minimum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	5 years
Transportation equipment \| Maximum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	10 years
Warehouse equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 481	418
Warehouse equipment \| Minimum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	5 years
Warehouse equipment \| Maximum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	12 years
Office equipment, furniture and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 867	858
Office equipment, furniture and software \| Minimum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	3 years
Office equipment, furniture and software \| Maximum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	7 years
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 99	$ 77

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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