v3.20.4
Other Assets - Estimated Future Amortization for Existing Identifiable Intangible Assets Through 2025 (Detail)
$ in Millions
Dec. 31, 2020
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2021 $ 111
2022 94
2023 84
2024 68
2025 $ 49