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Other assets impairments, restructuring and other items - Summary of Restructuring Accruals (Detail) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | $ (119) | $ (138)
Provision |  | (93) | (117)
Utilization and other | [1] | 130 | 136
Ending balance |  | (82) | (119)
Employee termination costs [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | (112) | (131)
Provision |  | (40) | (95)
Utilization and other | [1] | 77 | 114
Ending balance |  | (75) | (112)
Other Exit and Disposal [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | (7) | (7)
Provision |  | (53) | (22)
Utilization and other | [1] | 53 | 22
Ending balance |  | $ (7) | $ (7)
[1] | Includes adjustments for foreign currency translation.

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