v3.22.0.1
Other Financial Information (Other Financial Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Incurred      
Debt $ 887 $ 788 $ 799
Other 59 73 36
Interest Costs Incurred, Total 946 861 835
Capitalized (62) (55) (57)
Expensed 884 806 778
Other Income (Loss)      
Interest income 33 100 166
Gain (loss) on investment in Cenovus Energy 1,040 (855) 649
Other, net 130 246 543
Other nonoperating income (expense) 1,203 (509) 1,358
Research and development expenditures - expensed 62 75 82
Production and operating expenses 5,694 4,344 5,322
Shipping And Handling [Member]      
Other Income (Loss)      
Production and operating expenses 1,047 857 1,008
Operating Segments [Member]      
Other Income (Loss)      
Foreign currency transaction gain loss after tax (16) (62) 58
Alaska [Member] | Operating Segments [Member]      
Other Income (Loss)      
Interest income 0 0 0
Foreign currency transaction gain loss after tax 0 0 0
Lower 48 Segment | Operating Segments [Member]      
Other Income (Loss)      
Foreign currency transaction gain loss after tax 0 0 0
Canada Segment [Member] | Operating Segments [Member]      
Other Income (Loss)      
Foreign currency transaction gain loss after tax (1) (7) 5
Europe And North Africa Segment [Member] | Operating Segments [Member]      
Other Income (Loss)      
Foreign currency transaction gain loss after tax (11) (15) 0
Europe, Middle East and North Africa [Member] | Operating Segments [Member]      
Other Income (Loss)      
Interest income 2 5 11
Foreign currency transaction gain loss after tax 2 (11) 31
Asia Pacific [Member] | Operating Segments [Member]      
Other Income (Loss)      
Interest income 9 7 6
Foreign currency transaction gain loss after tax 1 2 1
Other International [Member] | Operating Segments [Member]      
Other Income (Loss)      
Interest income 0 0 0
Foreign currency transaction gain loss after tax $ (7) $ (31) $ 21