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Derivatives and Risk Management Activities - Net Unrealized Gain/(Loss) Recognized in AOCI (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Other current assets          
Derivatives, Fair Value [Line Items]          
Interest rate cash flow hedge derivative at fair value, net $ 29   $ 29    
Other long-term assets, net          
Derivatives, Fair Value [Line Items]          
Interest rate cash flow hedge derivative at fair value, net         $ 27
Interest rate derivatives          
Derivatives, Fair Value [Line Items]          
Interest rate derivatives, net $ 4 $ (9) $ 9 $ 9