Intangible Assets, net (Tables)

6 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Total intangible assets

	March 31, 2021						September 30, 2020
	Carrying Amount		Accumulated Amortization		Net Amount		Carrying Amount		Accumulated Amortization		Net Amount
Customer relationships	$	209.4	$	(93.7)	$	115.7	$	209.4	$	(76.9)	$	132.5
Trademarks and brands	213.4		(83.9)		129.5		213.4		(71.6)		141.8
Other intangible assets	3.1		(3.1)		—		3.1		(3.1)		—
Intangible assets, net	$	425.9	$	(180.7)	$	245.2	$	425.9	$	(151.6)	$	274.3