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Goodwill and Other Intangible Assets - Summary of Estimated Future Amortization Expense (Detail)
$ in Millions
Dec. 31, 2019
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2020 $ 600
2021 547
2022 417
2023 316
2024 258
Thereafter 822
Total $ 2,960