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Goodwill and Other Intangible Assets - Amortization Expense (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2020 $ 240
2021 230
2022 227
2023 226
2024 $ 220