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Property, plant and equipment -impairment of carrying amount of impaired asset (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Base discount rate for VIU calculations, net of tax | 5.00% |
Carrying amount after impairment | $ 10,610 | $ 21,619
Net impairement loss (Reversal) | $ 1,282 | 6,351
Exploration and Production Norway [Member] | High range value [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Derived pretax Discount rate range | 32.00% |
Exploration and Production Norway [Member] | Low range value [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Derived pretax Discount rate range | 18.00% |
Exploration and Production International [Member] | High range value [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Derived pretax Discount rate range | 9.00% |
Exploration and Production International [Member] | Low range value [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Derived pretax Discount rate range | 5.00% |
Exploration And Production USA [Member] | High range value [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Derived pretax Discount rate range | 7.00% |
Exploration And Production USA [Member] | Low range value [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Derived pretax Discount rate range | 6.00% |
Marketing, Midstream and Processing (MMP) [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Derived pretax Discount rate range | 7.00% |
VIU [Member] | Right of use assets [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | $ 16 | 265
Net impairement loss (Reversal) | (2) | 36
VIU [Member] | North America - offshore other areas [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 0 | 53
Net impairement loss (Reversal) | 0 | 146
VIU [Member] | Europe and Asia [Member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 1,566 | 3,687
Net impairement loss (Reversal) | 1,609 | 1,280
VIU [Member] | Exploration and Production Norway [Member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 5,379 | 7,042
Net impairement loss (Reversal) | (1,102) | 1,219
VIU [Member] | Exploration And Production USA [Member] | Onshore [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 1,979 | 4,676
Net impairement loss (Reversal) | 8 | (19)
VIU [Member] | Exploration And Production USA [Member] | Offshore Gulf of Mexico [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 798 | 2,808
Net impairement loss (Reversal) | 18 | 305
VIU [Member] | Marketing, Midstream and Processing (MMP) [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 632 | 1,297
Net impairement loss (Reversal) | 486 | 824
FVLCOD [Member] | Right of use assets [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 4 | 0
Net impairement loss (Reversal) | 17 | 0
FVLCOD [Member] | North America - offshore other areas [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 0 | 0
Net impairement loss (Reversal) | (22) | 0
FVLCOD [Member] | Exploration And Production USA [Member] | Onshore [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 0 | 1,122
Net impairement loss (Reversal) | 40 | 2,331
FVLCOD [Member] | Marketing, Midstream and Processing (MMP) [member] |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Carrying amount after impairment | 236 | 668
Net impairement loss (Reversal) | $ 230 | $ 228

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