Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2012
Goodwill
Beginning Balance	$ 948.8
Goodwill, Acquired During Period	70.7
Translation	5.8
Ending Balance	1,025.3
Architecture and Software [Member]
Goodwill
Beginning Balance	387.7
Goodwill, Acquired During Period	0
Translation	1.1
Ending Balance	388.8
Control Products and Solutions [Member]
Goodwill
Beginning Balance	561.1
Goodwill, Acquired During Period	70.7
Translation	4.7
Ending Balance	$ 636.5