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Provisions and other liabilities - Restatement of ARO due to change in the discount rate (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Disclosure of other provisions and other liabilities [line items] |  |  |  |
PPE |  | $ 62,075 | $ 68,508 | $ 71,751
Total non-current assets |  | 84,618 | 92,623 | 95,083
Total assets |  | 147,120 | 124,809 | 119,861
Provisions and other liabilities | [1] | 19,899 | 22,568 | 19,750
Total non-current liabilities |  | 68,959 | 71,097 | 59,144
Total liabilities |  | 108,096 | 90,917 | 78,702
Before restatement [member] |  |  |  |
Disclosure of other provisions and other liabilities [line items] |  |  |  |
PPE |  |  | 65,672 | 69,953
Total non-current assets |  |  | 89,786 | 93,285
Total assets |  |  | 121,972 | 118,063
Provisions and other liabilities |  |  | 19,731 | 17,951
Total non-current liabilities |  |  | 68,260 | 57,346
Total liabilities |  |  | 88,081 | 76,904
Impact of ARO policy change [member] |  |  |  |
Disclosure of other provisions and other liabilities [line items] |  |  |  |
PPE |  | 1,751 | 2,836 | 1,798
Total non-current assets |  |  | 2,836 | 1,798
Total assets |  |  | 2,836 | 1,798
Provisions and other liabilities |  | $ 1,751 | 2,837 | 1,798
Total non-current liabilities |  |  | 2,837 | 1,798
Total liabilities |  |  | $ 2,837 | $ 1,798
[1] | 1) Restated 1 January 2020 and 31 December 2020 figures due to a policy change affecting ARO, see note 2 Significant accounting policies and note 21 Provisions and other liabilities.

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