XML 163 R76.htm IDEA: XBRL DOCUMENT v3.20.4
Property, plant and equipment -Impairments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized $ 7,057 $ 4,093 $ (315)
The total net impairment losses recognised under IAS 36 6,401 4,043  
Goodwill [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 42 164 0
Other intangible assets [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 8 41 0
Acquisition costs related to oil and gas prospects [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 657 49 52
Producing and development assets [Member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 6,351 3,838 (367)
Property Plant And Equipment [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 5,671 3,230 (604)
Property Plant And Equipment [member] | Goodwill [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 0 0 0
Property Plant And Equipment [member] | Other intangible assets [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 0 0 0
Property Plant And Equipment [member] | Acquisition costs related to oil and gas prospects [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 0 0 0
Property Plant And Equipment [member] | Producing and development assets [Member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 5,671 3,230 (604)
Intangible assets [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 1,386 863 289
Intangible assets [member] | Goodwill [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 42 164 0
Intangible assets [member] | Other intangible assets [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 8 41 0
Intangible assets [member] | Acquisition costs related to oil and gas prospects [member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized 657 49 52
Intangible assets [member] | Producing and development assets [Member]      
Disclosure of impairment loss and reversal of impairment loss [line items]      
Total net impairment loss/ (reversal) recognized $ 680 $ 608 $ 237