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Goodwill and Other Intangible Assets - Amortization (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]    
2021 $ 130  
2022 125  
2023 122  
2024 115  
2025 115  
2026 and thereafter 350  
Net Carrying Value $ 957 $ 1,140