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Derivative Financial Instruments (Notional Value Of Outstanding Cash Flow Hedge Contracts By Year Of Maturity And Net Unrealized (Loss) Gain Included In Accumulated Other Comprehensive Income) (Details) - Designated as Hedging Instrument - Cash Flow Hedging - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Foreign Exchange Contract    
Derivative [Line Items]    
Derivative, Notional Amount $ 3,150 $ 2,930
Foreign Exchange Contract, Maturity 2025    
Derivative [Line Items]    
Derivative, Notional Amount 660 2,010
Foreign Exchange Contract, Maturity 2026    
Derivative [Line Items]    
Derivative, Notional Amount 1,860 920
Foreign Exchange Contract, Maturity 2027    
Derivative [Line Items]    
Derivative, Notional Amount $ 630 $ 0