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Other assets impairments, restructuring and other items - Components of costs associated with restructuring plan including costs related to exit and disposal activities (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 133 $ 120 $ 199
Employee termination [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 117 71 159
Other [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 16 $ 49 $ 40