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Leases - Schedule of Operating Lease Liability Maturity (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Sep. 30, 2022
Leases [Abstract]    
2024 $ 56  
2025 55  
2026 49  
2027 49  
2028 49  
Thereafter 104  
Total lease payments 362  
Less: Imputed interest (66)  
Operating lease liabilities $ 296 $ 281