Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Cumulative Foreign Currency Translation Gain Loss Recorded In Accumulated Other Comprehensive Income Loss For Net Investment In Foreign Operations Hedges	$ 137	$ 139
Counterparty Credit Derivative Exposure	18
Derivative Credit Risk Valuation Adjustment, Derivative Assets	(36)	$ (70)
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax Future Reclass	$ 5