Intangible Assets, Goodwill and Acquisitions (Tables)

9 Months Ended

Jun. 30, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

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

		June 30, 2021					September 30, 2020
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships	6-21 yrs.	$	691.9	$	(486.7	)	$	666.3	$	(448.3	)
Trademarks	12 yrs.		3.8		(2.2	)		3.8		(2.0	)
Non-compete agreements	5-7 yrs.		2.7		(1.6	)		2.7		(1.2	)
Total intangible assets		$	698.4	$	(490.5	)	$	672.8	$	(451.5	)

Summary of Goodwill

The following is a summary of the goodwill activity for the periods ended September 30, 2020 and June 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		73.0		11.0			84.0
Balance, June 30, 2021	$	1,753.4	$	189.9		$	1,943.3