Objectives and Strategies for Using Derivatives (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax		$ 81
Foreign Exchange Contract \| Not Designated as Hedging Instrument
Aggregate notional value	$ 2,200	2,200
Gains (Losses) on undesignated foreign exchange hedging instruments	(5)		$ 39	$ 17
Fair Value, Measurements, Recurring \| Fair Value, Inputs, Level 2
Derivative Assets	65	65	44
Derivative Liability	41	41	$ 92
Net Investment Hedging \| Foreign Exchange Contract
Aggregate notional value	1,400	1,400
Fair Value Hedging \| Interest Rate Contract
Aggregate notional value	625	625
Long-term Debt, Fair Value	633	633
Cash Flow Hedging \| Foreign Exchange Contract
Aggregate notional value	$ 691	$ 691

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