Property and Equipment

12 Months Ended

Sep. 30, 2025

Property, Plant and Equipment [Abstract]

Property and equipment, at cost, consists of the following:


	Fiscal Year Ended				Useful Lives (years)
	September 30, 2025		September 30, 2024

	(in millions)
Building and land	$	10.5	$	10.1	10	-	45
Leasehold improvements	275.0		299.3		1	-	20
Computer systems and equipment	770.4		659.6		3	-	12
Furniture and fixtures	85.7		92.2		3	-	10
Total	1,141.6		1,061.2
Accumulated depreciation and amortization	(725.4)		(706.8)
Property and equipment, net	$	416.2	$	354.4

Depreciation expense for the fiscal years ended September 30, 2025, 2024 and 2023 was $166.3 million, $152.3 million, and $152.3 million, respectively. Depreciation is calculated using primarily the straight-line method over the estimated useful lives of the assets, or in the case of leasehold improvements and capitalized leases, the lesser of the remaining term of the lease or its estimated useful life.