Intangible Assets, Goodwill, Acquisitions and Divestitures (Tables)

12 Months Ended

Sep. 30, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets as of September 30, 2021 and September 30, 2020 consisted of the following:

		September 30, 2021					September 30, 2020
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships	6-21 yrs.	$	694.9	$	(499.8	)	$	666.3	$	(448.3	)
Trademarks	4-12 yrs.		3.8		(2.3	)		3.8		(2.0	)
Non-compete agreements	5 yrs.		2.7		(1.7	)		2.7		(1.2	)
Total intangible assets		$	701.4	$	(503.8	)	$	672.8	$	(451.5	)

Schedule of Future Amortization Expense

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

Fiscal Year Ended September 30,
2022	$	46.3
2023		38.3
2024		30.7
2025		25.2
2026		18.5
2027 and thereafter		38.6
	$	197.6

Summary of Goodwill

The following is a summary of the goodwill activity for the periods ended September 30, 2020 and September 30, 2021:

	Maintenance Services		Development Services			Total
Balance, September 30, 2019		1,616.0		194.4			1,810.4
Acquisitions		64.4		—			64.4
Impairment Loss		—		(15.5	)		(15.5	)
Balance, September 30, 2020	$	1,680.4	$	178.9		$	1,859.3
Acquisitions		77.6		13.9			91.5
Balance, September 30, 2021	$	1,758.0	$	192.8		$	1,950.8