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Other assets impairments, restructuring and other items - Summary of Restructuring Accruals (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | $ (68) | $ (82)
Provision |  | (14) | (13)
Utilization and other | [1] | 25 | 39
Ending balance |  | (57) | (57)
Employee termination costs [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | (55) | (75)
Provision |  | (12) | (7)
Utilization and other | [1] | 23 | 32
Ending balance |  | (44) | (50)
Other Exit and Disposal [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | (13) | (7)
Provision |  | (2) | (6)
Utilization and other | [1] | 2 | 7
Ending balance |  | $ (13) | $ (6)
[1] | Includes adjustments for foreign currency translation.

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