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Leases - Future Minimum Lease Payments Under Non-cancelable Leases (Detail)
$ in Millions
Sep. 30, 2019
USD ($)
Operating leases  
2020 $ 23
2021 14
2022 9
2023 9
2024 8
2025 and thereafter 68
Total lease payments 131
Capital leases  
2020 3
2021 3
2022 3
2023 3
2024 2
2025 and thereafter 7
Total lease payments 21
Less: imputed interest 9
Total $ 12