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Derivative Instruments (Summary Of Notional Amounts) (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 82 $ 89
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount 228  
Designated as Hedging Instrument [Member] | Cross Currency Swap Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount 96 94
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount 82  
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount 345 249
Not Designated as Hedging Instrument [Member] | Cross Currency Swap Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 160 $ 160