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Leases - Future Capital Lease Payments (Details)
$ in Millions
Dec. 31, 2018
USD ($)
Leases [Abstract]  
2019 $ 16
2020 15
2021 16
2022 16
2023 17
2024 and thereafter 164
Total minimum payments 244
Less: amount representing interest and executory costs (81)
Present value of minimum payments 163
Less: current portion (6)
Long-term portion $ 157