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Intangible Assets - Amortization Expense (Details)
$ in Millions
6 Months Ended
Mar. 31, 2026
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Amortization of intangible assets $ 7.6
Remainder of fiscal year 16.0
2027 16.2
2028 16.1
2029 13.8
2030 $ 12.2