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Other Income - Schedule of Other Income (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Other Income [Line Items]      
Gain on divestitures, net of divestitures related costs [1] $ 8 $ 50 $ 67
Section 8 and similar payments [2]   5 195
Gain (loss) on sale of assets 11 (1) 9
Other, net 20 22 20
Total other income $ 40 $ 76 $ 291
[1] Mainly related to the divestment of several activities in our International Markets segment.
[2] Section 8 of the Patented Medicines (Notice of Compliance) Regulation relates to recoveries of lost revenue related to patent infringement proceedings in Canada.