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Other assets impairments, restructuring and other items - Summary of Restructuring Accruals (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Restructuring Cost and Reserve [Line Items]    
Beginning balance $ (119) $ (138)
Provision (56) (57)
Utilization and other [1] 52 65
Ending balance (123) (130)
Employee termination costs [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance (112) (131)
Provision (23) (52)
Utilization and other [1] 25 59
Ending balance (110) (124)
Other Exit and Disposal [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance (7) (7)
Provision (33) (5)
Utilization and other [1] 27 6
Ending balance $ (13) $ (6)
[1] Includes adjustments for foreign currency translation.