v3.26.1
Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Sep. 30, 2025
Finite Lived Intangible Assets [Line Items]    
Gross carrying amount $ 1,359 $ 1,372
Accumulated amortization (1,124) (1,087)
Net carrying amount 235 285
Intangible Assets, Net [Abstract]    
Gross carrying amount 1,637 1,650
Net carrying amount 513 563
Trademarks and Trade Names [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross carrying amount 74 75
Accumulated amortization (42) (39)
Net carrying amount 32 36
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]    
Indefinite-lived intangible assets 278 278
Intellectual Property [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross carrying amount 678 683
Accumulated amortization (657) (638)
Net carrying amount 21 45
Customer Lists [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross carrying amount 607 614
Accumulated amortization (425) (410)
Net carrying amount $ 182 $ 204