Segment Disclosures and Related Information - Other Segment Disclosure (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Investment in and advances to affiliates	$ 8,998,000,000	$ 8,057,000,000	$ 8,998,000,000	$ 8,057,000,000
Total Assets	122,599,000,000	95,994,000,000	122,599,000,000	95,994,000,000	$ 122,780,000,000
Capital expenditures and investments	3,286,000,000	2,969,000,000	6,664,000,000	5,885,000,000
Corporate
Segment Reporting Information [Line Items]
Investment in and advances to affiliates	1,612,000,000	1,489,000,000	1,612,000,000	1,489,000,000
Total Assets	9,466,000,000	9,708,000,000	9,466,000,000	9,708,000,000
Capital expenditures and investments	32,000,000	181,000,000	57,000,000	345,000,000
Alaska \| Operating Segments
Segment Reporting Information [Line Items]
Investment in and advances to affiliates	4,000,000	33,000,000	4,000,000	33,000,000
Total Assets	19,374,000,000	17,124,000,000	19,374,000,000	17,124,000,000
Capital expenditures and investments	986,000,000	691,000,000	2,032,000,000	1,411,000,000
Lower 48 \| Operating Segments
Segment Reporting Information [Line Items]
Investment in and advances to affiliates	126,000,000	122,000,000	126,000,000	122,000,000
Total Assets	65,087,000,000	42,659,000,000	65,087,000,000	42,659,000,000
Capital expenditures and investments	1,704,000,000	1,649,000,000	3,518,000,000	3,265,000,000
Canada \| Operating Segments
Segment Reporting Information [Line Items]
Investment in and advances to affiliates	0	0	0	0
Total Assets	10,029,000,000	10,047,000,000	10,029,000,000	10,047,000,000
Capital expenditures and investments	144,000,000	131,000,000	309,000,000	283,000,000
EMENA \| Operating Segments
Segment Reporting Information [Line Items]
Investment in and advances to affiliates	2,084,000,000	1,265,000,000	2,084,000,000	1,265,000,000
Total Assets	10,128,000,000	7,968,000,000	10,128,000,000	7,968,000,000
Capital expenditures and investments	356,000,000	227,000,000	630,000,000	446,000,000
AP \| Operating Segments
Segment Reporting Information [Line Items]
Investment in and advances to affiliates	5,172,000,000	5,143,000,000	5,172,000,000	5,143,000,000
Total Assets	8,515,000,000	8,483,000,000	8,515,000,000	8,483,000,000
Capital expenditures and investments	64,000,000	90,000,000	118,000,000	135,000,000
OI \| Operating Segments
Segment Reporting Information [Line Items]
Investment in and advances to affiliates	0	5,000,000	0	5,000,000
Total Assets	0	5,000,000	0	5,000,000
Capital expenditures and investments	$ 0	$ 0	$ 0	$ 0