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Leases - Future Minimum Direct Finance Lease Payments to be Received (Detail)
$ in Millions
Sep. 30, 2019
USD ($)
Leases [Abstract]  
Minimum lease payments to be received, 2019 $ 1
Minimum lease payments to be received, 2020 2
Minimum lease payments to be received, 2021 2
Minimum lease payments to be received, 2022 2
Minimum lease payments to be received, 2023 2
Minimum lease payments to be received, Thereafter 25
Minimum lease payments to be received, Total 34
Executory costs, Total (13)
Minimum lease payments receivable $ 21