Intangible Assets, Goodwill and Acquisitions (Tables)

12 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets as of September 30, 2019 and September 30, 2018 consist of thefollowing:

		September 30, 2019					September 30, 2018
	Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships	6-21 yrs.	$	639.6	$	(393.3	)	$	622.8	$	(337.8	)
Trademarks(1)	4-12 yrs.		4.8		(1.7	)		230.9		(227.5	)
Non-compete agreements	5 yrs.		2.7		(0.6	)		2.3		(0.2	)
Total intangible assets		$	647.1	$	(395.6	)	$	856.0	$	(565.5	)

Schedule of Changes in Carrying Amount of Goodwill

The following table shows changes in the carrying amount of goodwill from September 30, 2017 to September 30, 2019 by reportable segment:

	Maintenance Services		Development Services		Total
Balance, September 30, 2017	$	1,523.3	$	180.5	$	1,703.8
Acquisitions		49.1		13.9		63.0
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

Schedule of Future Amortization Expense

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

Fiscal Year Ended September 30,
2020	$	51.1
2021		42.3
2022		35.9
2023		31.4
2024		24.7
2025 and thereafter		65.1
	$	250.5