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Long-Term Debt - Maturities of Debt (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Future contractual maturities of long-term debt and capital leases (excluding issue discounts, premiums and fair value adjustments)  
2019 $ 11
2020 8
2021 850
2022 1,210
2023 911
2024 and thereafter 7,307
Total long-term debt $ 10,297