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Goodwill and Intangible Assets - Total Future Amortization Expense for Finite-lived Intangible Assets (Detail) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]    
Nine months ending December 31, 2020 $ 37  
2021 49  
2022 48  
2023 42  
2024 27  
Thereafter 115  
Finite-lived intangible assets, Net Carrying Amount $ 318 $ 334