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Financial and Other Derivative Instruments (Net Cash Collateral Offsetting Arrangements) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Cash collateral netted against Derivative assets $ (35) $ (17)
Cash collateral netted against Derivative liabilities 5 0
Cash collateral recorded in Accounts receivable 20 29
Cash collateral recorded in Accounts payable (28) (5)
Total net cash collateral posted (received) $ (38) $ 7