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Other Expense, Net - Other Expense, Net (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Other Expense, Nonoperating [Abstract]    
Impairment and loss on sale of equity-accounted investment $ 347 $ 700
Restructuring and impairments 269 58
Net (gains) losses on investments (32) 6
Gain on sale of business   (524)
Other expense, net $ 584 $ 240