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Other Intangible Assets, Net - Estimated Amortization Expense of Existing Intangible Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]    
2021 $ 97  
2022 82  
2023 64  
2024 49  
2025 35  
Thereafter 118  
Net Cost $ 445 $ 299