Property, net (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Property, net
Land	$ 3.7	$ 3.7
Buildings and improvements	315.9	304.5
Machinery and equipment	1,032.4	1,041.5
Internal-use software	418.2	388.9
Construction in progress	118.2	90.2
Total	1,888.4	1,828.8
Less accumulated depreciation	(1,255.5)	(1,212.8)
Property, net	$ 632.9	$ 616.0	$ 587.1