Fair Value of Financial Instruments -Financial Assets and Liabilities Not Carried at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value
Financial liabilities:
Short-term and long-term debt (a)	$ 4,379	$ 5,323
Carrying Amount
Financial liabilities:
Short-term and long-term debt (a)	$ 3,702	$ 4,806

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

No definition available.

Name:	us-gaap_DebtLongtermAndShorttermCombinedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant