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Segment Disclosures and Related Information - Other Segment Disclosure (Details) - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]      
Investment in and advances to affiliates $ 8,762,000,000 $ 7,834,000,000  
Total Assets 124,254,000,000 95,348,000,000 $ 122,780,000,000
Capital expenditures and investments 3,378,000,000 2,916,000,000  
Corporate      
Segment Reporting Information [Line Items]      
Investment in and advances to affiliates 1,580,000,000 1,287,000,000  
Total Assets 11,237,000,000 9,482,000,000  
Capital expenditures and investments 25,000,000 164,000,000  
Alaska | Operating Segments      
Segment Reporting Information [Line Items]      
Investment in and advances to affiliates 4,000,000 33,000,000  
Total Assets 18,587,000,000 16,701,000,000  
Capital expenditures and investments 1,046,000,000 720,000,000  
Lower 48 | Operating Segments      
Segment Reporting Information [Line Items]      
Investment in and advances to affiliates 125,000,000 119,000,000  
Total Assets 66,294,000,000 42,586,000,000  
Capital expenditures and investments 1,814,000,000 1,616,000,000  
Canada | Operating Segments      
Segment Reporting Information [Line Items]      
Investment in and advances to affiliates 0 0  
Total Assets 9,604,000,000 10,028,000,000  
Capital expenditures and investments 165,000,000 152,000,000  
EMENA | Operating Segments      
Segment Reporting Information [Line Items]      
Investment in and advances to affiliates 2,056,000,000 1,211,000,000  
Total Assets 10,191,000,000 8,021,000,000  
Capital expenditures and investments 274,000,000 219,000,000  
AP | Operating Segments      
Segment Reporting Information [Line Items]      
Investment in and advances to affiliates 4,988,000,000 5,184,000,000  
Total Assets 8,331,000,000 8,530,000,000  
Capital expenditures and investments 54,000,000 45,000,000  
OI | Operating Segments      
Segment Reporting Information [Line Items]      
Investment in and advances to affiliates 9,000,000 0  
Total Assets 10,000,000 0  
Capital expenditures and investments $ 0 $ 0