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Goodwill and Other Intangible Assets - Finite-lived Intangible Assets, Future Amortization Expense (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
2020 $ 13  
2021 12  
2022 11  
2023 11  
2024 10  
Thereafter 20  
Total $ 77 $ 2