Business Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Sales and operating results of reportable segments
Sales	$ 1,649.5	$ 1,624.2	$ 4,841.7	$ 4,636.2
Income before income taxes	274.0	257.4	795.2	701.7
Interest expense	(14.4)	(15.3)	(44.3)	(46.0)
Operating Segments [Member]
Sales and operating results of reportable segments
Income before income taxes	326.1	317.8	956.2	879.0
Architecture & Software [Member]
Sales and operating results of reportable segments
Sales	715.2	671.0	2,097.9	1,967.7
Income before income taxes	204.8	188.6	606.9	541.7
Control Products & Solutions [Member]
Sales and operating results of reportable segments
Sales	934.3	953.2	2,743.8	2,668.5
Income before income taxes	121.3	129.2	349.3	337.3
Segment Reconciling Items [Member]
Sales and operating results of reportable segments
Purchase accounting depreciation and amortization	(5.5)	(4.6)	(15.9)	(14.8)
Non-operating pension costs	(14.1)	(19.6)	(42.1)	(59.0)
Corporate, Non-Segment [Member]
Sales and operating results of reportable segments
General corporate - net	(18.1)	(20.9)	(58.7)	(57.5)
Interest expense	$ (14.4)	$ (15.3)	$ (44.3)	$ (46.0)