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Other assets impairments, restructuring and other items - Schedule of Other Assets Impairments, Restructuring and Other Items (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restructuring and Impairment Costs [Line Items]      
Impairments of long-lived tangible assets $ 139 $ 500 $ 544
Contingent consideration (see note 20) 59 57 154
Acquisition, Integration and related costs   13 105
Restructuring 199 488 535
Venezuela deconsolidation charge     396
Other 26 (71) 102
Total $ 423 $ 987 $ 1,836