Intangible Assets, Goodwill, Acquisitions and Divestitures (Tables)

12 Months Ended

Sep. 30, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets as of September 30, 2020 and September 30, 2019 consisted of the following:

		September 30, 2020					September 30, 2019
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships	6-21 yrs.	$	666.3	$	(448.3	)	$	639.6	$	(393.3	)
Trademarks	4-12 yrs.		3.8		(2.0	)		4.8		(1.7	)
Non-compete agreements	5 yrs.		2.7		(1.2	)		2.7		(0.6	)
Total intangible assets		$	672.8	$	(451.5	)	$	647.1	$	(395.6	)

Schedule of Future Amortization Expense

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

Fiscal Year Ended September 30,
2021	$	46.9
2022		40.5
2023		33.6
2024		26.8
2025		22.1
2026 and thereafter		51.4
	$	221.3

Summary of Goodwill

The following is a summary of the goodwill activity for the periods ended September 30, 2019 and September 30, 2020:

	Maintenance Services		Development Services			Total
Balance, September 30, 2018	$	1,572.4	$	194.4		$	1,766.8
Acquisitions		43.6		—			43.6
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