Business Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Sales and operating results of reportable segments
Sales	$ 1,624.2	$ 1,560.4	$ 4,636.2	$ 4,595.4
Income before taxes	257.4	244.8	701.7	711.0
Interest Expense	(15.3)	(15.2)	(46.0)	(45.2)
Operating Segments [Member]
Sales and operating results of reportable segments
Income before taxes	317.8	292.1	879.0	860.5
Architecture and Software [Member]
Sales and operating results of reportable segments
Sales	671.0	663.8	1,967.7	1,979.1
Income before taxes	188.6	185.2	541.7	545.0
Control Products and Solutions [Member]
Sales and operating results of reportable segments
Sales	953.2	896.6	2,668.5	2,616.3
Income before taxes	129.2	106.9	337.3	315.5
Segment Reconciling Items [Member]
Sales and operating results of reportable segments
Purchase Accounting Depreciation and Amortization	(4.6)	(5.0)	(14.8)	(14.9)
Non-operating pension cost	(19.6)	(8.8)	(59.0)	(26.4)
Corporate, Non-Segment [Member]
Sales and operating results of reportable segments
General Corporate - Net	(20.9)	(18.3)	(57.5)	(63.0)
Interest Expense	$ (15.3)	$ (15.2)	$ (46.0)	$ (45.2)