Intangible Assets, Goodwill and Acquisitions (Tables)

12 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets as of September 30, 2023 and September 30, 2022 consisted of the following:

		September 30, 2023					September 30, 2022
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships	6-21 yrs.	$	725.5	$	(594.1	)	$	723.1	$	(550.5	)
Trademarks	12 yrs.		3.8		(2.9	)		3.8		(2.6	)
Non-compete agreements	5 yrs.		2.7		(2.7	)		2.7		(2.2	)
Total intangible assets		$	732.0	$	(599.7	)	$	729.6	$	(555.3	)

Schedule of Future Amortization Expense

Amortization expense is anticipated to be as follows in future years:

Fiscal Year Ended September 30,
2024	$	36.0
2025		29.6
2026		22.0
2027		15.2
2028		11.1
2029 and thereafter		18.4
	$	132.3

Summary of Goodwill

The following is a summary of the goodwill activity for the periods ended September 30, 2022 and September 30, 2023:

	Maintenance Services		Development Services		Total
Balance, September 30, 2021		1,758.0		192.8		1,950.8
Acquisitions (1)		34.7		23.3		58.0
Balance, September 30, 2022	$	1,792.7	$	216.1	$	2,008.8
Acquisitions (1)		10.7		1.9		12.6
Balance, September 30, 2023	$	1,803.4	$	218.0	$	2,021.4

(1)The acquisitions adjustments include the immaterial impact of foreign currency and other prior year measurement period adjustments during the respective periods.