Intangible Assets, Goodwill and Acquisitions (Tables)

6 Months Ended

Mar. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets as of March 31, 2021 and September 30, 2020 consisted of the following:

		March 31, 2021					September 30, 2020
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships	6-21 yrs.	$	685.5	$	(474.4	)	$	666.3	$	(448.3	)
Trademarks	12 yrs.		3.8		(2.1	)		3.8		(2.0	)
Non-compete agreements	5-7 yrs.		2.7		(1.4	)		2.7		(1.2	)
Total intangible assets		$	692.0	$	(477.9	)	$	672.8	$	(451.5	)

Summary of Goodwill

The following is a summary of the goodwill activity for the periods ended September 30, 2020 and March 31, 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		50.8		9.5			60.3
Balance, March 31, 2021	$	1,731.2	$	188.4		$	1,919.6