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Intangible Assets (Tables)
12 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Gross and Net Carrying Values of Intangible Assets
The gross and net carrying values of intangible assets as of the balance sheet dates, by major intangible asset class are as follows (in millions):
 September 30, 2024September 30, 2023
Gross
Amount
Accumulated
Amortization
Net AmountGross
Amount
Accumulated
Amortization
Net Amount
Intangible assets subject to amortization:
Trade/domain names$4.1 $(3.2)$0.9 $4.1 $(2.4)$1.7 
Software programs/platforms4.9 (4.1)0.8 28.5 (26.9)1.6 
Client base37.7 (25.6)12.1 38.3 (24.1)14.2 
Total intangible assets subject to amortization46.7 (32.9)13.8 70.9 (53.4)17.5 
Intangible assets not subject to amortization
Website domains2.1 — 2.1 1.9 — 1.9 
Business licenses3.7 — 3.7 3.7 — 3.7 
Total intangible assets not subject to amortization5.8 — 5.8 5.6 — 5.6 
Total intangible assets$52.5 $(32.9)$19.6 $76.5 $(53.4)$23.1 
Schedule of Expected Amortization Expense
As of September 30, 2024, estimated future amortization expense was as follows:
(in millions) 
Fiscal 2025$4.1 
Fiscal 20263.1 
Fiscal 20272.4 
Fiscal 20281.5 
Fiscal 2029 and thereafter2.7 
$13.8