Segment Information - Segment Financial Data (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Segment Reporting Information
Total revenues	$ 10,642	$ 12,757	$ 22,119	$ 24,396
Purchases and related costs	(9,758)	(11,838)	(20,277)	(22,543)
Field operating costs	(286)	(280)	(585)	(553)
Segment general and administrative expenses	(82)	(79)	(168)	(160)
Total significant segment expenses	(10,126)	(12,197)	(21,030)	(23,256)
Equity earnings in unconsolidated entities	94	106	196	201
Segment Adjusted EBITDA	570	565
Investment and acquisition capital expenditures	218	79	1,002	261
Maintenance capital expenditures	44	43	77	90
Investments in unconsolidated entities	2,709		2,709		$ 2,811
Product sales revenues
Segment Reporting Information
Total revenues	10,197	12,351	21,243	23,584
Services
Segment Reporting Information
Total revenues	445	406	876	812
Operating Segments
Segment Reporting Information
Total revenues	10,648	12,760	22,128	24,403
Operating Segments | Crude Oil
Segment Reporting Information
Total revenues	10,622	12,735	22,061	24,317
Purchases and related costs	(9,742)	(11,820)	(20,231)	(22,484)
Field operating costs	(279)	(272)	(571)	(538)
Segment general and administrative expenses	(75)	(72)	(155)	(146)
Total significant segment expenses	(10,096)	(12,164)	(20,957)	(23,168)
Equity earnings in unconsolidated entities	94	106	196	201
Depreciation and amortization of unconsolidated entities	20	17	40	37
Derivative activities and inventory valuation adjustments	52	(4)	28	34
Long-term inventory costing adjustments	17	4	18	(25)
Deficiencies under minimum volume commitments, net	(9)	7	(16)	(5)
Equity-indexed compensation expense	8	10	18	19
Foreign currency revaluation	9	(2)	9	(19)
Transaction-related expenses	3		8
Segment amounts attributable to noncontrolling interests	(140)	(133)	(265)	(261)
Total other segment items	(40)	(101)	(160)	(220)
Segment Adjusted EBITDA	580	576	1,140	1,130
Investment and acquisition capital expenditures	218	79	1,002	261
Maintenance capital expenditures	43	41	74	87
Investments in unconsolidated entities	2,709		2,709		$ 2,811
Operating Segments | NGL
Segment Reporting Information
Total revenues	26	25	67	86
Purchases and related costs	(22)	(21)	(55)	(66)
Field operating costs	(7)	(8)	(14)	(15)
Segment general and administrative expenses	(7)	(7)	(13)	(14)
Total significant segment expenses	(36)	(36)	(82)	(95)
Total other segment items	0		0	0
Segment Adjusted EBITDA	(10)	(11)	(15)	(9)
Investment and acquisition capital expenditures	0	0	0	0
Maintenance capital expenditures	1	2	3	3
Operating Segments | Product sales revenues | Crude Oil
Segment Reporting Information
Total revenues	10,178	12,330	21,185	23,505
Operating Segments | Product sales revenues | NGL
Segment Reporting Information
Total revenues	24	23	66	84
Operating Segments | Services | Crude Oil
Segment Reporting Information
Total revenues	444	405	876	812
Operating Segments | Services | NGL
Segment Reporting Information
Total revenues	2	2	1	2
Intersegment revenues elimination
Segment Reporting Information
Total revenues	(6)	(3)	(9)	(7)
Purchases and related costs	6	3	9	7
Total significant segment expenses	6	3	9	7
Intersegment revenues elimination | Product sales revenues
Segment Reporting Information
Total revenues	(5)	(2)	(8)	(5)
Intersegment revenues elimination | Services
Segment Reporting Information
Total revenues	$ (1)	$ (1)	$ (1)	$ (2)