Accounts Receivable, net (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for expected credit losses	$ (18)	$ (2)
Accounts receivable, net	270	399
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross, current	208	337
Credit Card Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross, current	55	29
Vendor Receivables For Rebates Branding And Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross, current	21	19
Other Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross, current	$ 4	$ 16