Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 09, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Marcellus
Disaggregation of Revenue [Line Items]
Revenues	$ 119	$ 1,370	$ 631	$ 856
Haynesville
Disaggregation of Revenue [Line Items]
Revenues	53	998	362	620
Eagle Ford
Disaggregation of Revenue [Line Items]
Revenues	193	1,712	1,428	2,330
Powder River Basin
Disaggregation of Revenue [Line Items]
Revenues	33	321	231	478
Mid-Continent
Disaggregation of Revenue [Line Items]
Revenues			93	233
Oil | Marcellus
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Oil | Haynesville
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Oil | Eagle Ford
Disaggregation of Revenue [Line Items]
Revenues	159	1,354	1,202	2,010
Oil | Powder River Basin
Disaggregation of Revenue [Line Items]
Revenues	20	202	170	369
Oil | Mid-Continent
Disaggregation of Revenue [Line Items]
Revenues			55	164
Natural gas | Marcellus
Disaggregation of Revenue [Line Items]
Revenues	119	1,370	631	856
Natural gas | Haynesville
Disaggregation of Revenue [Line Items]
Revenues	53	998	362	620
Natural gas | Eagle Ford
Disaggregation of Revenue [Line Items]
Revenues	17	179	129	185
Natural gas | Powder River Basin
Disaggregation of Revenue [Line Items]
Revenues	7	75	41	77
Natural gas | Mid-Continent
Disaggregation of Revenue [Line Items]
Revenues			25	44
NGL | Marcellus
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
NGL | Haynesville
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
NGL | Eagle Ford
Disaggregation of Revenue [Line Items]
Revenues	17	179	97	135
NGL | Powder River Basin
Disaggregation of Revenue [Line Items]
Revenues	6	44	20	32
NGL | Mid-Continent
Disaggregation of Revenue [Line Items]
Revenues			13	25
Oil, Natural Gas and NGL
Disaggregation of Revenue [Line Items]
Revenues	398	4,401	2,745	4,517
Oil, Natural Gas and NGL | Oil
Disaggregation of Revenue [Line Items]
Revenues	179	1,556	1,427	2,543
Oil, Natural Gas and NGL | Natural gas
Disaggregation of Revenue [Line Items]
Revenues	196	2,622	1,188	1,782
Oil, Natural Gas and NGL | NGL
Disaggregation of Revenue [Line Items]
Revenues	23	223	130	192
Marketing Revenue from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues			1,799	3,619
Marketing Revenue from Contracts with Customers | Oil
Disaggregation of Revenue [Line Items]
Revenues			1,195	2,473
Marketing Revenue from Contracts with Customers | Natural gas
Disaggregation of Revenue [Line Items]
Revenues			494	900
Marketing Revenue from Contracts with Customers | NGL
Disaggregation of Revenue [Line Items]
Revenues			110	246
Other marketing revenue
Disaggregation of Revenue [Line Items]
Revenues			70	352
Other marketing revenue | Oil
Disaggregation of Revenue [Line Items]
Revenues			67	311
Other marketing revenue | Natural gas
Disaggregation of Revenue [Line Items]
Revenues			3	41
Other marketing revenue | NGL
Disaggregation of Revenue [Line Items]
Revenues			0	0
Losses on marketing derivatives
Disaggregation of Revenue [Line Items]
Revenues				(4)
Losses on marketing derivatives | Oil
Disaggregation of Revenue [Line Items]
Revenues				0
Losses on marketing derivatives | Natural gas
Disaggregation of Revenue [Line Items]
Revenues				(4)
Losses on marketing derivatives | NGL
Disaggregation of Revenue [Line Items]
Revenues				0
Marketing
Disaggregation of Revenue [Line Items]
Revenues	239	2,263	1,869	3,967
Marketing | Oil
Disaggregation of Revenue [Line Items]
Revenues	141	1,158	1,262	2,784
Marketing | Natural gas
Disaggregation of Revenue [Line Items]
Revenues	78	908	497	937
Marketing | NGL
Disaggregation of Revenue [Line Items]
Revenues	$ 20	$ 197	$ 110	$ 246