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Other assets impairments, restructuring and other items - Summary of Restructuring Accruals (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Restructuring Cost and Reserve [Line Items]    
Beginning balance $ (119) $ (138)
Provision (66) (92)
Utilization and other [1] 102 103
Ending balance (83) (127)
Employee termination costs [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance (112) (131)
Provision (24) (63)
Utilization and other [1] 60 74
Ending balance (76) (120)
Other Exit and Disposal [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance (7) (7)
Provision (42) (29)
Utilization and other [1] 42 29
Ending balance $ (7) $ (7)
[1] Includes adjustments for foreign currency translation.