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Commitments and Contingencies - Schedule of Environmental Loss Contingencies (Details) - Excluding Line 901 Incident - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Loss Contingencies [Line Items]    
Estimated undiscounted reserve for environmental liabilities, short-term [Extensible Enumeration] Other current liabilities Other current liabilities
Estimated undiscounted reserve for environmental liabilities, short-term $ 15 $ 11
Estimated undiscounted reserve for environmental liabilities, long-term [Extensible Enumeration] Other long-term liabilities and deferred credits Other long-term liabilities and deferred credits
Estimated undiscounted reserve for environmental liabilities, long-term $ 73 $ 69
Estimated undiscounted reserve for environmental liabilities $ 88 $ 80