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Provisions and other current liabilities - Restructuring provisions (Details) - Restructuring provisions - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Reconciliation of changes in other provisions [abstract]      
January 1 $ 29 $ 64 $ 17
Additions 0 39 72
Cash payments (27) (74) (24)
Releases (1) 0 (1)
Currency translation effects (1) 0 0
December 31 $ 0 $ 29 $ 64