Debt (Short Term Debt Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Short-term debt	$ 9,685,000,000	$ 9,682,000,000
Line of credit | Accounts receivable securitization facility expiring 2021
Short-term Debt [Line Items]
Short-term debt	$ 843,000,000
Extension period	364 days
Maximum borrowing capacity	$ 900,000,000
Collateral amount	$ 1,180,000,000