Goodwill and Other Intangible Assets (Details) $ in Millions	6 Months Ended
	Mar. 31, 2016 USD ($)
Goodwill
Balance as of September 30, 2015	$ 1,028.8
Acquisition of business	9.2
Translation	(15.1)
Balance as of March 31, 2016	1,022.9
Architecture & Software [Member]
Goodwill
Balance as of September 30, 2015	388.0
Acquisition of business	9.2
Translation	(4.4)
Balance as of March 31, 2016	392.8
Control Products & Solutions [Member]
Goodwill
Balance as of September 30, 2015	640.8
Acquisition of business	0.0
Translation	(10.7)
Balance as of March 31, 2016	$ 630.1