Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite and Indefinite-Lived 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):

	March 31, 2024						September 30, 2023
	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Intangible assets subject to amortization
Trade/domain names	$	4.1	$	(2.8)	$	1.3	$	4.1	$	(2.4)	$	1.7
Software programs/platforms	4.9		(3.7)		1.2		28.5		(26.9)		1.6
Client and supplier base	35.2		(23.0)		12.2		38.3		(24.1)		14.2
Total intangible assets subject to amortization	44.2		(29.5)		14.7		70.9		(53.4)		17.5
Intangible assets not subject to amortization
Website domains	2.0		—		2.0		1.9		—		1.9
Business licenses	3.7		—		3.7		3.7		—		3.7
Total intangible assets not subject to amortization	5.7		—		5.7		5.6		—		5.6
Total intangible assets	$	49.9	$	(29.5)	$	20.4	$	76.5	$	(53.4)	$	23.1

Schedule of Expected Amortization Expense

As of March 31, 2024, estimated future amortization expense was as follows:

(in millions)
Fiscal 2024 (remaining months)	$	3.0
Fiscal 2025	3.7
Fiscal 2026	2.9
Fiscal 2027	2.3
Fiscal 2028 and thereafter	2.8
Total intangible assets subject to amortization	$	14.7