Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total operating revenues	$ 4,541	$ 1,598	$ 11,622	$ 3,720
Depreciation, depletion and amortization expense	298	138	861	334
Impairments	0	6	0	6
Operating income	2,414	636	5,844	1,230
Interest expense	50	34	139	95
Loss on derivatives	(1,903)	(2,399)	(6,709)	(3,461)
(Loss) gain on extinguishment of debt	0	(59)	(6)	(59)
Other income (loss), net	0	(1)	(1)	(1)
Assets	13,104	9,241	13,104	9,241	$ 11,848
Capital investments	543	291	1,672	816
Restructuring charges	0	0	0	7
Merger-related expenses	0	35	27	39
Increase (decrease) in accrued expenditures	(33)	34	44	63
Benefit from income taxes	11	0	41	0
Intersegment Revenues
Segment Reporting Information [Line Items]
Total operating revenues	3,142	933	7,842	2,200
E&P
Segment Reporting Information [Line Items]
Total operating revenues	3,243	1,179	8,251	2,616
Depreciation, depletion and amortization expense	297	136	857	327
Impairments		6		6
Operating income	2,386	628	5,784	1,209
Interest expense	50	34	139	95
Loss on derivatives	(1,903)	(2,398)	(6,707)	(3,461)
(Loss) gain on extinguishment of debt		0	0	0
Other income (loss), net		(1)	0	(1)
Assets	11,359	8,572	11,359	8,572
Capital investments	540	291	1,669	816
Restructuring charges				7
Merger-related expenses		35	27	39
Benefit from income taxes	11		41	0
E&P | Intersegment Revenues
Segment Reporting Information [Line Items]
Total operating revenues	4	(14)	(1)	(42)
Marketing
Segment Reporting Information [Line Items]
Total operating revenues	1,298	419	3,371	1,104
Depreciation, depletion and amortization expense	1	2	4	7
Impairments		0		0
Operating income	28	8	60	21
Interest expense	0	0	0	0
Loss on derivatives	0	0	0	0
(Loss) gain on extinguishment of debt		0	0	0
Other income (loss), net		0	(1)	0
Assets	1,633	546	1,633	546
Capital investments	0	0	0	0
Benefit from income taxes	0		0	0
Marketing | Intersegment Revenues
Segment Reporting Information [Line Items]
Total operating revenues	3,138	947	7,843	2,242
Other
Segment Reporting Information [Line Items]
Total operating revenues	0	0	0	0
Depreciation, depletion and amortization expense	0	0	0	0
Impairments		0		0
Operating income	0	0	0	0
Interest expense	0	0	0	0
Loss on derivatives	0	(1)	(2)	0
(Loss) gain on extinguishment of debt		(59)	(6)	(59)
Other income (loss), net			0	0
Assets	112	123	112	123
Capital investments	3	0	3	0
Benefit from income taxes	0		0	0
Other | Intersegment Revenues
Segment Reporting Information [Line Items]
Total operating revenues	$ 0	$ 0	$ 0	$ 0