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Other assets impairments, restructuring and other items - Schedule of Other Assets Impairments, Restructuring and Other Items (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Restructuring and Impairment Costs [Line Items]        
Impairments of long-lived tangible assets [1] $ 32 $ 277 $ 80 $ 352
Contingent consideration (19) 76 (16) 83
Restructuring (13) 33 69 73
Other 28 (6) 33 (5)
Total $ 28 $ 381 $ 165 $ 502
[1] Including impairments related to exit and disposal activities