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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
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Restructuring and Impairment Costs [Line Items] |  |  |
Impairments of long-lived tangible assets | [1] | $ 75 | $ 20
Contingent consideration |  | 6 | (71)
Restructuring |  | 39 | 32
Other |  |  | 20
Total |  | $ 121 | $ 1
[1] | Including impairments related to exit and disposal activities

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