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Leases - Schedule of Future Minimum Lease Payments (Detail)
$ in Millions
Dec. 31, 2018
USD ($)
Capital Leases  
2019 $ 7
2020 7
2021 8
2022 8
2023 6
Thereafter 88
Total minimum lease payments 124
Less: imputed interest (62)
Present value of lease liabilities 62
Operating Leases  
2019 123
2020 94
2021 86
2022 72
2023 64
Thereafter 212
Total minimum lease payments $ 651