Derivatives - Financial Statement Presentation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022		Mar. 31, 2021	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 861			$ 785
Derivative Liability, Fair Value, Gross Liability	(1,380)			(1,189)
Derivative Asset, Fair Value, Gross Liability	(716)			(476)
Derivative Liability, Fair Value, Gross Asset	903			772
Derivative Asset	145			309
Derivative Liability	(477)			(417)
Energy Related Derivative | Gain (Loss) on Derivative Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(194)		$ (36)
Designated as Hedging Instrument [Member] | Energy Related Derivative | Gain (Loss) on Derivative Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0		(2)
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset	861			785
Derivative Liability, Fair Value, Gross Liability	(1,380)			(1,189)
Not Designated as Hedging Instrument [Member] | Energy Related Derivative | Gain (Loss) on Derivative Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(69)		(34)
Unrealized Gain (Loss) on Derivatives	(125)	[1]	$ 0
Not Designated as Hedging Instrument [Member] | Energy Related Derivative | Gain (Loss) on Derivative Instruments | Gas & NGL Marketing Services
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Derivatives	(59)
Not Designated as Hedging Instrument [Member] | Energy Related Derivative | Gain (Loss) on Derivative Instruments | Other [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Derivatives	(66)
Other Current Liabilities | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset	657			619
Derivative Liability, Fair Value, Gross Liability	(954)			(760)
Regulatory liabilities, deferred income, and other [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset	204			166
Derivative Liability, Fair Value, Gross Liability	$ (426)			$ (429)

[1] Amounts for the three months ended March 31, 2022 include $59 million related to our Gas & NGL Marketing Services segment and $66 million related to our Other segment.