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Segment Disclosures and Related Information - Summary of Segment Level Net Income (Loss) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | $ 54,745,000,000 | $ 56,141,000,000 | $ 78,494,000,000
Production and operating expenses | 8,751,000,000 | 7,693,000,000 | 7,006,000,000
Depreciation, depletion and amortization | 9,599,000,000 | 8,270,000,000 | 7,504,000,000
Income tax provision (benefit) | 4,427,000,000 | 5,331,000,000 | 9,548,000,000
Total | 22,777,000,000 | 21,294,000,000 | 24,058,000,000
Equity in earnings of affiliates | (1,705,000,000) | (1,720,000,000) | (2,081,000,000)
Interest income | (402,000,000) | (412,000,000) | (195,000,000)
Interest and debt expense | 783,000,000 | 780,000,000 | 805,000,000
Other | 24,047,000,000 | 25,242,000,000 | 37,227,000,000
Total | 22,723,000,000 | 23,890,000,000 | 35,756,000,000
Net Income (Loss) | 9,245,000,000 | 10,957,000,000 | 18,680,000,000
Pipeline Company |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 6,700,000,000 | 5,800,000,000 |
Operating Segments And Corporate Nonsegment |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 56,906,000,000 | 58,045,000,000 | 80,984,000,000
Intersegment eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | (2,161,000,000) | (1,904,000,000) | (2,490,000,000)
Alaska |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 6,553,000,000 | 7,098,000,000 | 7,905,000,000
Production and operating expenses | 1,951,000,000 | 1,829,000,000 | 1,703,000,000
Depreciation, depletion and amortization | 1,299,000,000 | 1,061,000,000 | 939,000,000
Income tax provision (benefit) | 480,000,000 | 642,000,000 | 885,000,000
Total | 3,730,000,000 | 3,532,000,000 | 3,527,000,000
Equity in earnings of affiliates | 1,000,000 | (1,000,000) | (4,000,000)
Interest income | 0 | 0 | 0
Interest and debt expense | 0 | 0 | 0
Other | 1,496,000,000 | 1,789,000,000 | 2,030,000,000
Total | 1,497,000,000 | 1,788,000,000 | 2,026,000,000
Net Income (Loss) | 1,326,000,000 | 1,778,000,000 | 2,352,000,000
Alaska | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 6,553,000,000 | 7,098,000,000 | 7,905,000,000
Alaska | Intersegment eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 0 | 0 | 0
Lower 48 |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 37,026,000,000 | 38,237,000,000 | 52,903,000,000
Production and operating expenses | 4,751,000,000 | 4,199,000,000 | 3,627,000,000
Depreciation, depletion and amortization | 6,442,000,000 | 5,722,000,000 | 4,865,000,000
Income tax provision (benefit) | 1,462,000,000 | 1,763,000,000 | 3,088,000,000
Total | 12,655,000,000 | 11,684,000,000 | 11,580,000,000
Equity in earnings of affiliates | (5,000,000) | 9,000,000 | 14,000,000
Interest income | 0 | 0 | 0
Interest and debt expense | 0 | 0 | 0
Other | 19,201,000,000 | 20,083,000,000 | 30,294,000,000
Total | 19,196,000,000 | 20,092,000,000 | 30,308,000,000
Net Income (Loss) | $ 5,175,000,000 | $ 6,461,000,000 | 11,015,000,000
Lower 48 | Pipeline Company | Revenue Benchmark | Customer Concentration Risk |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk percentage | 12.00% | 10.00% |
Lower 48 | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | $ 37,028,000,000 | $ 38,244,000,000 | 52,921,000,000
Lower 48 | Intersegment eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | (2,000,000) | (7,000,000) | (18,000,000)
Canada |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 3,514,000,000 | 3,006,000,000 | 3,714,000,000
Production and operating expenses | 902,000,000 | 619,000,000 | 591,000,000
Depreciation, depletion and amortization | 639,000,000 | 420,000,000 | 402,000,000
Income tax provision (benefit) | 228,000,000 | 26,000,000 | 206,000,000
Total | 1,769,000,000 | 1,065,000,000 | 1,199,000,000
Equity in earnings of affiliates | 0 | 0 | 0
Interest income | 0 | 0 | 0
Interest and debt expense | 0 | 0 | 0
Other | 1,033,000,000 | 1,539,000,000 | 1,801,000,000
Total | 1,033,000,000 | 1,539,000,000 | 1,801,000,000
Net Income (Loss) | 712,000,000 | 402,000,000 | 714,000,000
Canada | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 5,636,000,000 | 4,873,000,000 | 6,159,000,000
Canada | Intersegment eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | (2,122,000,000) | (1,867,000,000) | (2,445,000,000)
Europe, Middle East and North Africa |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 5,788,000,000 | 5,854,000,000 | 11,270,000,000
Production and operating expenses | 671,000,000 | 593,000,000 | 590,000,000
Depreciation, depletion and amortization | 761,000,000 | 587,000,000 | 736,000,000
Income tax provision (benefit) | 2,854,000,000 | 3,065,000,000 | 5,445,000,000
Total | 4,286,000,000 | 4,245,000,000 | 6,771,000,000
Equity in earnings of affiliates | (586,000,000) | (580,000,000) | (780,000,000)
Interest income | 0 | (1,000,000) | (1,000,000)
Interest and debt expense | 0 | 0 | 0
Other | 899,000,000 | 1,001,000,000 | 3,036,000,000
Total | 313,000,000 | 420,000,000 | 2,255,000,000
Net Income (Loss) | 1,189,000,000 | 1,189,000,000 | 2,244,000,000
Europe, Middle East and North Africa | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 5,788,000,000 | 5,854,000,000 | 11,271,000,000
Europe, Middle East and North Africa | Intersegment eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 0 | 0 | (1,000,000)
Asia Pacific |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 1,847,000,000 | 1,913,000,000 | 2,606,000,000
Production and operating expenses | 384,000,000 | 391,000,000 | 365,000,000
Depreciation, depletion and amortization | 425,000,000 | 455,000,000 | 518,000,000
Income tax provision (benefit) | 211,000,000 | 42,000,000 | 480,000,000
Total | 1,020,000,000 | 888,000,000 | 1,363,000,000
Equity in earnings of affiliates | (1,089,000,000) | (1,151,000,000) | (1,310,000,000)
Interest income | (8,000,000) | (8,000,000) | (9,000,000)
Interest and debt expense | 0 | 0 | 0
Other | 200,000,000 | 223,000,000 | (174,000,000)
Total | (897,000,000) | (936,000,000) | (1,493,000,000)
Net Income (Loss) | 1,724,000,000 | 1,961,000,000 | 2,736,000,000
Asia Pacific | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 1,847,000,000 | 1,913,000,000 | 2,606,000,000
Asia Pacific | Intersegment eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 0 | 0 | 0
Other International |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 0 | 0 | 0
Production and operating expenses | 0 | 1,000,000 | 0
Depreciation, depletion and amortization | 0 | 0 | 0
Income tax provision (benefit) | (1,000,000) | 0 | 53,000,000
Total | (1,000,000) | 1,000,000 | 53,000,000
Equity in earnings of affiliates | 0 | 0 | (1,000,000)
Interest income | 0 | 0 | 0
Interest and debt expense | 0 | 0 | 0
Other | 2,000,000 | 12,000,000 | (1,000,000)
Total | 2,000,000 | 12,000,000 | (2,000,000)
Net Income (Loss) | (1,000,000) | (13,000,000) | (51,000,000)
Other International | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 0 | 0 | 0
Other International | Intersegment eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 0 | 0 | 0
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 17,000,000 | 33,000,000 | 96,000,000
Production and operating expenses | 92,000,000 | 61,000,000 | 130,000,000
Depreciation, depletion and amortization | 33,000,000 | 25,000,000 | 44,000,000
Income tax provision (benefit) | (807,000,000) | (207,000,000) | (609,000,000)
Total | (682,000,000) | (121,000,000) | (435,000,000)
Equity in earnings of affiliates | (26,000,000) | 3,000,000 | 0
Interest income | (394,000,000) | (403,000,000) | (185,000,000)
Interest and debt expense | 783,000,000 | 780,000,000 | 805,000,000
Other | 1,216,000,000 | 595,000,000 | 241,000,000
Total | 1,579,000,000 | 975,000,000 | 861,000,000
Net Income (Loss) | (880,000,000) | (821,000,000) | (330,000,000)
Corporate | Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | 54,000,000 | 63,000,000 | 122,000,000
Corporate | Intersegment eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales and other operating revenues | $ (37,000,000) | $ (30,000,000) | $ (26,000,000)

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