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Segment Disclosures and Related Information - Sales and Other Operating Revenues (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]      
Sales and other operating revenues $ 56,141 $ 78,494 $ 45,828
Operating Segments      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 56,141 78,494 45,828
Corporate and Other      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 33 96 75
Alaska | Operating Segments      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 7,098 7,905 5,480
Lower 48      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 38,244 52,921 29,306
Lower 48 | Operating Segments      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 38,237 52,903 29,294
Lower 48 | Intersegment eliminations      
Segment Reporting Information [Line Items]      
Sales and other operating revenues (7) (18) (12)
Canada      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 4,873 6,159 4,077
Canada | Operating Segments      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 3,006 3,714 2,494
Canada | Intersegment eliminations      
Segment Reporting Information [Line Items]      
Sales and other operating revenues (1,867) (2,445) (1,583)
Europe, Middle East and North Africa      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 5,854 11,271 5,902
Europe, Middle East and North Africa | Operating Segments      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 5,854 11,270 5,902
Europe, Middle East and North Africa | Intersegment eliminations      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 0 (1) 0
Asia Pacific | Operating Segments      
Segment Reporting Information [Line Items]      
Sales and other operating revenues 1,913 2,606 2,579
Other International | Operating Segments      
Segment Reporting Information [Line Items]      
Sales and other operating revenues $ 0 $ 0 $ 4