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Fair Value Measurements And Disclosure (Notional Amount Of Our Outstanding Derivative Positions) (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Derivative [Line Items]    
Notional amounts of outstanding derivative positions $ 37,101 $ 39,756
Interest rate swaps    
Derivative [Line Items]    
Notional amounts of outstanding derivative positions 1,750 1,750
Cross-currency swaps    
Derivative [Line Items]    
Notional amounts of outstanding derivative positions $ 35,351 $ 38,006