Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jun. 30, 2014
Goodwill
Beginning Balance	$ 1,023.0
Acquisition of businesses	35.7
Translation	10.6
Ending Balance	1,069.3
Finite-lived Intangible Assets Acquired	41.4
Architecture & Software [Member]
Goodwill
Beginning Balance	387.8
Acquisition of businesses	7.7
Translation	4.6
Ending Balance	400.1
Control Products & Solutions [Member]
Goodwill
Beginning Balance	635.2
Acquisition of businesses	28.0
Translation	6.0
Ending Balance	$ 669.2