Intangible Assets, Goodwill and Acquisitions (Tables)

3 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets as of December 31, 2023 and September 30, 2023 consisted of the following:

		December 31, 2023					September 30, 2023
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships	6-21 yrs.	$	725.5	$	(604.2	)	$	725.5	$	(594.1	)
Trademarks	12 yrs.		3.8		(3.0	)		3.8		(2.9	)
Total intangible assets		$	732.0	$	(609.9	)	$	732.0	$	(599.7	)

Summary of Goodwill

The following is a summary of the goodwill activity for the periods ended September 30, 2023 and December 31, 2023:

	Maintenance Services		Development Services		Total
Balance, September 30, 2022	$	1,792.7	$	216.1	$	2,008.8
Acquisitions (1)		10.7		1.9		12.6
Balance, September 30, 2023	$	1,803.4	$	218.0	$	2,021.4
Acquisitions (1)		0.1		—		0.1
Balance, December 31, 2023	$	1,803.5	$	218.0	$	2,021.5

(1)The acquisitions adjustment includes the immaterial impact of foreign currency adjustments during the period.