Derivative and Hedging Activities - Derivative Instruments (Details) - Energy related derivative $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) Bcf MMBbls	Dec. 31, 2021 USD ($) MMBbls Bcf
Derivative [Line Items]
Fair Value	$ (2,490)	$ (1,143)
Natural gas
Derivative [Line Items]
Notional Volume | Bcf	1,689	1,112
Fair Value	$ (2,062)	$ (785)
Natural gas | Fixed-price swaps
Derivative [Line Items]
Notional Volume | Bcf	570	637
Fair Value	$ (1,442)	$ (675)
Natural gas | Collars
Derivative [Line Items]
Notional Volume | Bcf	607	205
Fair Value	$ (482)	$ (82)
Natural gas | Three-way collars
Derivative [Line Items]
Notional Volume | Bcf	17	0
Fair Value	$ (33)	$ 0
Natural gas | Call options
Derivative [Line Items]
Notional Volume | Bcf	18	18
Fair Value	$ (41)	$ (17)
Natural gas | Swaptions
Derivative [Line Items]
Notional Volume | Bcf	7	0
Fair Value	$ (13)	$ 0
Natural gas | Basis protection swaps
Derivative [Line Items]
Notional Volume | Bcf	470	252
Fair Value	$ (51)	$ (11)
Oil
Derivative [Line Items]
Notional Volume | MMBbls	27	22
Fair Value	$ (428)	$ (358)
Oil | Fixed-price swaps
Derivative [Line Items]
Notional Volume | MMBbls	7	13
Fair Value	$ (362)	$ (356)
Oil | Collars
Derivative [Line Items]
Notional Volume | MMBbls	6	0
Fair Value	$ (53)	$ 0
Oil | Basis protection swaps
Derivative [Line Items]
Notional Volume | MMBbls	14	9
Fair Value	$ (13)	$ (2)