Intangible Assets, net (Tables)

9 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Total Intangible Assets

	June 30, 2018							September 30, 2017
	Carrying Amount		Accumulated Amortization			Net Amount		Carrying Amount		Accumulated Amortization			Net Amount
Subject to amortization:
Customer relationships	$	2,622.1	$	(516.9	)	$	2,105.2	$	2,249.3	$	(416.7	)	$	1,832.6
Trademarks and brands	838.6		(195.9		)	642.7		834.1		(162.9		)	671.2
Other intangible assets	21.7		(11.4		)	10.3		21.7		(9.8		)	11.9
	3,482.4		(724.2		)	2,758.2		3,105.1		(589.4		)	2,515.7
Not subject to amortization:
Trademarks and brands	1,226.5		—			1,226.5		838.2		—			838.2
	$	4,708.9	$	(724.2	)	$	3,984.7	$	3,943.3	$	(589.4	)	$	3,353.9