Income Taxes Significant Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Deferred tax assets:
Operating lease liabilities	$ 38	$ 0
Workers’ compensation, general and fleet liabilities	36	40
Financing lease and other long term liabilities	90	0
Net operating loss carryforwards	64	73
Other deferred tax assets	63	48
Total gross deferred tax assets	291	161
Less valuation allowance	(36)	(30)
Total net deferred tax assets	255	131
Deferred tax liabilities:
Property and equipment	(221)	(121)
Operating lease assets	(37)	0
Inventories	(35)	(39)
Intangibles	(259)	(262)
Other deferred tax liabilities	(11)	0
Total deferred tax liabilities	(563)	(422)
Net deferred tax liability	$ (308)	$ (291)