Property, net (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Property, net
Land	$ 3.7	$ 3.7
Buildings and improvements	304.5	292.5
Machinery and equipment	1,041.5	1,022.1
Internal-use software	388.9	414.6
Construction in progress	90.2	65.7
Total	1,828.8	1,798.6
Less accumulated depreciation	(1,212.8)	(1,211.5)
Property, net	$ 616.0	$ 587.1	$ 561.4