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Supplemental Financial Information - Accounts and Other Receivables (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Trade receivables $ 81 $ 46
Credit card receivables 129 35
Business partners and other suppliers 380 274
Taxes receivable 696 740
Other 42 35
Accounts and other receivables 1,328 1,130
Vendor prepayment $ 0 $ 600