Intangible Assets, Goodwill and Acquisitions

3 Months Ended

Dec. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets, Goodwill and Acquisitions

7.Intangible Assets, Goodwill and Acquisitions

Identifiable intangible assets consist of acquired customer contracts and relationships, trademarks and non-compete agreements. Amortization expense related to intangible assets was $13.5 and $15.1 for the three months ended December 31, 2019 and 2018, respectively. These assets are amortized over their estimated useful lives of which the reasonableness is continually evaluated by the Company.

Intangible assets as of December 31, 2019 and September 30, 2019 consisted of the following:

		December 31, 2019					September 30, 2019
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships	6-21 yrs.	$	643.8	$	(406.6	)	$	639.6	$	(393.3	)
Trademarks	4-12 yrs.		4.8		(1.7	)		4.8		(1.7	)
Non-compete agreements	5 yrs.		2.7		(0.8	)		2.7		(0.6	)
Total intangible assets		$	651.3	$	(409.1	)	$	647.1	$	(395.6	)

The following is a summary of the activity for the periods ended September 30, 2019 and December 31, 2019 for goodwill:

	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		12.6		—		12.6
Balance, December 31, 2019	$	1,628.6	$	194.4	$	1,823.0