Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013
Goodwill
Beginning Balance	$ 1,023.0
Acquisition of businesses	23.5
Translation	6.3
Ending Balance	1,052.8
Finite-lived Intangible Assets Acquired	31.5
Architecture & Software [Member]
Goodwill
Beginning Balance	387.8
Acquisition of businesses	0
Translation	2.0
Ending Balance	389.8
Control Products & Solutions [Member]
Goodwill
Beginning Balance	635.2
Acquisition of businesses	23.5
Translation	4.3
Ending Balance	$ 663.0