Business Segment Information (Details 1) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Identifiable assets	$ 6,404.7	$ 6,224.3	$ 5,844.6
Depreciation and amortization	162.5	152.5	145.2
Purchase accounting depreciation and amortization	21.0	21.6	19.3
Capital expenditures	122.9	141.0	146.2
Architecture and Software [Member]
Segment Reporting Information [Line Items]
Identifiable assets	1,790.5	1,874.5	1,653.4
Depreciation and amortization	69.7	64.8	68.1
Capital expenditures	29.4	33.6	31.5
Control Products and Solutions [Member]
Segment Reporting Information [Line Items]
Identifiable assets	2,078.1	2,273.7	2,200.0
Depreciation and amortization	70.3	65.9	57.7
Capital expenditures	56.8	51.2	52.8
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets	2,536.1	2,076.1	1,991.2
Depreciation and amortization	1.5	0.2	0.1
Capital expenditures	36.7	56.2	61.9
Operating Segments [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 141.5	$ 130.9	$ 125.9