Hedging Activities and Fair Value Measurements - Schedule of Liability Balance Sheet Offsetting (Details) - Commodity derivatives - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 418	$ 495
Gross Amounts Offset in the Balance Sheet	0	0
Amounts of Liabilities Presented in the Balance Sheet	418	495
Financial Instruments	(417)	(495)
Cash Collateral Received	0	0
Cash Collateral Paid	0	0
Amounts That Would Have Been Presented On Net Basis	$ 1	$ 0