Provisions and other non-current liabilities - Changes (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in provisions and other non-current liabilities
Balance as of the beginning of the period	$ 21,257	$ 21,402	$ 20,269
Allowances	1,056	1,269	2,724
Reversals	(1,538)	(1,315)	(1,397)
Currency translation adjustment	(419)	212	(834)
Other	(484)	(311)	640
Balance as of the end of the period	19,872	21,257	21,402
Provision for financial risk
Changes in provisions and other non-current liabilities
Allowances	20	18	1,363
Reversals	(16)	(29)	(15)
Asset retirement obligations
Changes in provisions and other non-current liabilities
Allowances	568	524	430
Reversals	(464)	(339)	(418)
Provisions for environmental contingencies
Changes in provisions and other non-current liabilities
Allowances	65	117	97
Reversals	(183)	(158)	(133)
Restructuring activities
Changes in provisions and other non-current liabilities
Allowances	15	69	31
Reversals	$ (103)	$ (138)	$ (230)

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- Definition

The amount of increase in other provisions resulting from additional provisions made and adjustments arising from the passage of time.

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- Definition

The increase (decrease) in other provisions and non-current liabilities resulting from foreign currency exchange rate changes.

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The increase (decrease) in other provisions and non-current liabilities resulting from changes that the entity does not separately disclose in the same statement or note.

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The aggregate amount of non-current provisions other than provisions for employee benefits and other non-current liabilities.

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- Definition

The amount of decrease in other provisions resulting from provisions used and the reversal of unused provisions.

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