Current Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total current receivables, gross	$ 6,118	$ 6,073
Less: Allowance for credit losses	(400)	(373)
Total current receivables, net	5,718	5,700
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	548	507
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total current receivables, gross	$ 846	$ 890