Deferred Costs, Capitalized, Prepaid, and Other Assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Inventory, Work in Process, Gross	$ 69	$ 41
Fair value	12	64
Other current assets	162	120
Prepaid Insurance	16	19
Other Assets, Miscellaneous, Current	12	7
Prepaid software maintenance	25	22
Other Intangible Assets, Net	114	35
Prepaid Expense and Other Assets, Current	16	7
Prepaid Expense, Current	$ 7	$ 6