Commodity Derivatives - Financial Statement Presentation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Derivative assets	Derivative assets
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Derivative Liability, Current	Derivative Liability, Current
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities and Deferred Revenue, Noncurrent	Other Liabilities and Deferred Revenue, Noncurrent
Energy Related Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Liability	$ (382)	$ (552)
Derivative Liability, Fair Value, Gross Asset	670	554
Derivative Asset	344	314
Derivative Liability	(400)	(287)
Gain (Loss) on Derivative Instruments, Net, Pretax	(264)	909	$ (324)
Energy Related Derivative | Gain (Loss) on Derivative Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(250)	956	(387)
Energy Related Derivative | Cost of Sales
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(14)	(47)	63
Not Designated as Hedging Instrument [Member] | Energy Related Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset	726	866
Derivative Liability, Fair Value, Gross Liability	(1,070)	(841)
Not Designated as Hedging Instrument [Member] | Energy Related Derivative | Gain (Loss) on Derivative Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized	111	253	(91)
Unrealized	(361)	703	(296)
Not Designated as Hedging Instrument [Member] | Energy Related Derivative | Cost of Sales
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized	(8)	(4)	16
Unrealized	(6)	(43)	$ 47
Derivative assets [Member] | Not Designated as Hedging Instrument [Member] | Energy Related Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset	508	623
Regulatory assets, deferred charges, and other [Member] | Not Designated as Hedging Instrument [Member] | Energy Related Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset	218	243
Derivative Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Energy Related Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value, Gross Liability	(635)	(496)
Regulatory liabilities, deferred income, and other [Member] | Not Designated as Hedging Instrument [Member] | Energy Related Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ (435)	$ (345)