Recently Adopted and Issued Accounting Standards Impact of ASC 606 on the Income Statement and Balance Sheet (Details) - Accounting Standards Update 2014-09 - USD ($) $ in Millions	3 Months Ended	4 Months Ended	6 Months Ended
	Sep. 08, 2018	Jun. 16, 2018	Sep. 08, 2018
Net sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting standard adoptions		$ 3
Cost of sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting standard adoptions		3
Accounts Receivable
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting standard adoptions		3
Other Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting standard adoptions		1
Inventories
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting standard adoptions		(3)
Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting standard adoptions		$ 0
Advertising and Fuel Discount [Member] | Net sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting standard adoptions	$ (1)
Advertising and Fuel Discount [Member] | Cost of sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of accounting standard adoptions			$ (3)