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Leases - Schedule of Future Minimum Rent Payments (Details)
$ in Millions
Dec. 31, 2018
USD ($)
Operating leases  
Schedule of Future Lease Payments [Line Items]  
2019 $ 206
2020 191
2021 166
2022 134
2023 119
Thereafter 865
Total minimum lease payments 1,681
Capital leases  
Schedule of Future Lease Payments [Line Items]  
2019 30
2020 30
2021 30
2022 29
2023 29
Thereafter 164
Total minimum lease payments 312
Less: amount representing interest (87)
Present value of minimum lease payments $ 225