Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total operating revenues	$ 2,943	$ 1,072
Depreciation, depletion and amortization expense	275	96
Impairments	0
Operating income	1,299	301
Interest expense	41	31
Loss on derivatives	(3,927)	(191)
Loss on extinguishment of debt	(2)	0
Other Income, Net	0	1
Assets	11,847	5,247	$ 11,848
Capital investments	544	266
Restructuring charges	0	6
Merger-related expenses	25	1
Increase (decrease) in accrued expenditures	43	38
Benefit from income taxes	4	0
Intersegment Revenues
Segment Reporting Information [Line Items]
Total operating revenues	1,886	630
E&P
Segment Reporting Information [Line Items]
Total operating revenues	2,077	719
Depreciation, depletion and amortization expense	274	94
Impairments	0
Operating income	1,278	295
Interest expense	41	31
Loss on derivatives	(3,925)	(191)
Loss on extinguishment of debt	0
Other Income, Net	0	1
Assets	10,766	4,741
Capital investments	544	266
Restructuring charges		6
Merger-related expenses	25	1
Benefit from income taxes	4
E&P | Intersegment Revenues
Segment Reporting Information [Line Items]
Total operating revenues	(3)	(14)
Marketing
Segment Reporting Information [Line Items]
Total operating revenues	866	353
Depreciation, depletion and amortization expense	1	2
Impairments	0
Operating income	21	6
Interest expense	0	0
Loss on derivatives	0	0
Loss on extinguishment of debt	0
Other Income, Net	0	0
Assets	969	396
Capital investments	0	0
Benefit from income taxes	0
Marketing | Intersegment Revenues
Segment Reporting Information [Line Items]
Total operating revenues	1,889	644
Other
Segment Reporting Information [Line Items]
Total operating revenues	0	0
Depreciation, depletion and amortization expense	0	0
Impairments	0
Operating income	0	0
Interest expense	0	0
Loss on derivatives	(2)	0
Loss on extinguishment of debt	(2)
Other Income, Net	0	0
Assets	112	110
Capital investments	0	0
Benefit from income taxes	0
Other | Intersegment Revenues
Segment Reporting Information [Line Items]
Total operating revenues	$ 0	$ 0