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Summary of Significant Accounting Policies - Changes in Carrying Amount of Service and Product Warranties (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Product Warranties Disclosures [Abstract]    
Beginning Balance $ 105 $ 135
Net provisions for warranties issued during the year 41 38
Amounts incurred (56) (67)
Currency translation adjustments   (1)
Ending Balance $ 90 $ 105