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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
Sep. 30, 2023
Dec. 31, 2022
Derivative [Line Items]    
Interest Rate Derivative Assets, at Fair Value $ 0 $ 109
Price Risk Cash Flow Hedge Asset, at Fair Value 16 0
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value 96 104
Derivative Instruments in Hedges, Assets, at Fair Value 112 213
Interest Rate Derivative Liabilities, at Fair Value 0 0
Price Risk Fair Value Hedge Liability, at Fair Value 0 20
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Liabilities, Fair Value 0 0
Derivative Instruments in Hedges, Liabilities, at Fair Value $ 0 $ 20