Acquisitions (Details) $ in Millions	12 Months Ended
	Sep. 30, 2016 USD ($) store	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)
Peerless
Acquisitions
Cost of acquisition	$ 23.9
Intangible assets subject to amortization	7.8
Goodwill expected to be deducted for tax purposes	$ 13.1
Number of beauty supply stores | store	15
Not individually material acquisitions
Acquisitions
Cost of acquisition	$ 2.3	$ 7.1	$ 4.9
Intangible assets subject to amortization	$ 2.3	2.2	1.4
Goodwill expected to be deducted for tax purposes		$ 2.8	$ 2.6