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Segment Disclosures and Related Information - Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Total Assets    
Total Assets $ 93,693 $ 90,661
Corporate and Other    
Total Assets    
Total Assets 9,615 7,745
Alaska | Operating Segments    
Total Assets    
Total Assets 14,835 14,812
Lower 48 | Operating Segments    
Total Assets    
Total Assets 43,478 41,699
Canada | Operating Segments    
Total Assets    
Total Assets 7,358 7,439
Europe, Middle East and North Africa | Operating Segments    
Total Assets    
Total Assets 8,406 9,125
Asia Pacific | Operating Segments    
Total Assets    
Total Assets 9,997 9,840
Other International | Operating Segments    
Total Assets    
Total Assets $ 4 $ 1