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Derivative Instruments and Hedging Activities (Fair Value Of Derivatives Designated As Hedging Instruments) (Details) - Designated As Hedging Instrument [Member] - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Derivative [Line Items]    
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value $ 62 $ 104
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Liabilities, Fair Value 132 0
Interest Rate Derivative Assets, at Fair Value 0 109
Interest Rate Derivative Liabilities, at Fair Value 0 0
Derivative Instruments in Hedges, Assets, at Fair Value 62 213
Derivative Instruments in Hedges, Liabilities, at Fair Value 141 20
Price Risk Cash Flow Hedge Asset, at Fair Value 0 0
Price Risk Fair Value Hedge Liability, at Fair Value $ 9 $ 20