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Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2025

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, 2025																		September 30, 2024
			Gross Amount						Accumulated Amortization						Net Amount						Gross Amount						Accumulated Amortization						Net Amount
Intangible assets subject to amortization:
Trade/domain names and other licenses			$	10.6					$	(4.9)					$	5.7					$	4.1					$	(3.2)					$	0.9
Software programs/platforms			2.4						(2.0)						0.4						4.9						(4.1)						0.8
Client base			445.0						(19.2)						425.8						37.7						(25.6)						12.1
Total intangible assets subject to amortization			458.0						(26.1)						431.9						46.7						(32.9)						13.8
Intangible assets not subject to amortization
Website domains			2.3						—						2.3						2.1						—						2.1
Business licenses			3.7						—						3.7						3.7						—						3.7
Total intangible assets not subject to amortization			6.0						—						6.0						5.8						—						5.8
Total intangible assets			$	464.0					$	(26.1)					$	437.9					$	52.5					$	(32.9)					$	19.6

Schedule of Expected Amortization Expense

As of September 30, 2025, estimated future amortization expense was as follows:

(in millions)
Fiscal 2026			$	31.9
Fiscal 2027			28.9
Fiscal 2028			27.8
Fiscal 2029			27.0
Fiscal 2030 and thereafter			316.3
			$	431.9

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- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life or exist in perpetuity, by either major class or business segment.

+ References

No definition available.

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- References

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X

- Definition

Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 40
-SubTopic 30
-Topic 350
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482640/350-30-55-40

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-2

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