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Current Receivables (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total current receivables, gross $ 6,051 $ 5,995
Less: Allowance for credit losses (400) (373)
Total current receivables, net 5,651 5,622
Customer receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total current receivables, gross 4,724 4,676
Related parties    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total current receivables, gross 481 429
Other    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total current receivables, gross $ 846 $ 890