Derivative and Hedging Activities - Schedule of Effect of Derivative Instruments, Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Derivatives, Fair Value [Line Items]
Short-term derivative asset	$ 429	$ 264
Long-term derivative asset	127	47
Short-term derivative liability	0	(3)
Long-term derivative liability	0	(1)
Not Designated as Hedging Instrument \| Commodity Contract
Derivatives, Fair Value [Line Items]
Derivative asset (liability), fair value, gross asset (liability)	556	307
Derivative asset (liability) fair value, net asset (liability), netted	0	0
Short-term derivative asset	429	264
Long-term derivative asset	127	47
Short-term derivative liability	0	(3)
Long-term derivative liability	0	(1)
Total derivatives	556	307
Not Designated as Hedging Instrument \| Commodity Contract \| Short-term derivative asset
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset	661	340
Derivative asset, fair value, gross liability, netted	(232)	(76)
Not Designated as Hedging Instrument \| Commodity Contract \| Long-term derivative asset
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset	142	66
Derivative asset, fair value, gross liability, netted	(15)	(19)
Not Designated as Hedging Instrument \| Commodity Contract \| Short-term derivative liability
Derivatives, Fair Value [Line Items]
Derivative liability, fair value, gross liability	(232)	(79)
Derivative liability, fair value, gross asset, netted	232	76
Not Designated as Hedging Instrument \| Commodity Contract \| Long-term derivative liability
Derivatives, Fair Value [Line Items]
Derivative liability, fair value, gross liability	(15)	(20)
Derivative liability, fair value, gross asset, netted	$ 15	$ 19

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