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Leases Future Minimum Payments (Details)
$ in Millions
Sep. 30, 2019
USD ($)
Leases [Abstract]  
Future minimum annual rentals for noncancelable long-term leases, 2020 $ 159
Future minimum annual rentals for noncancelable long-term leases, 2021 112
Future minimum annual rentals for noncancelable long-term leases, 2022 82
Future minimum annual rentals for noncancelable long-term leases, 2023 57
Future minimum annual rentals for noncancelable long-term leases, 2024 38
Future minimum annual rentals for noncancelable long-term leases, thereafter $ 63