v3.22.0.1
Impairments (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]            
Impairments       $ 674 $ 813 $ 405
APLNG [Member]            
Segment Reporting Information [Line Items]            
Impairments $ 688          
Asia Pacific [Member] | Operating Segments [Member]            
Segment Reporting Information [Line Items]            
Impairments       695 0 0
Asia Pacific [Member] | Operating Segments [Member] | APLNG [Member]            
Segment Reporting Information [Line Items]            
Impairments       688    
Lower 48 [Member]            
Segment Reporting Information [Line Items]            
Impairments       (89)    
Lower 48 [Member] | Operating Segments [Member]            
Segment Reporting Information [Line Items]            
Impairments $ 84     (8) 804 402
Lower 48 [Member] | Operating Segments [Member] | Noncore Assets [Member]            
Segment Reporting Information [Line Items]            
Impairments         813  
Lower 48 [Member] | Operating Segments [Member] | Wind River Basin [Member]            
Segment Reporting Information [Line Items]            
Impairments   $ 287 $ 523      
Lower 48 [Member] | Operating Segments [Member] | Niobrara [Member]            
Segment Reporting Information [Line Items]            
Impairments           402
Europe, Middle East and North Africa [Member] | Operating Segments [Member]            
Segment Reporting Information [Line Items]            
Impairments       $ (24) $ 6 $ 1