Business Segment Information (Details 1) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Identifiable assets	$ 7,101.2	$ 6,404.7	$ 6,224.3
Depreciation and amortization	172.2	162.5	152.5
Purchase accounting depreciation and amortization	18.4	21.0	21.6
Capital expenditures	116.9	122.9	141.0
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets	3,012.3	2,536.1	2,076.1
Depreciation and amortization	1.5	1.5	0.2
Capital expenditures	50.7	36.7	56.2
Operating Segments [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	153.8	141.5	130.9
Architecture and Software [Member]
Segment Reporting Information [Line Items]
Identifiable assets	2,054.3	1,790.5	1,874.5
Depreciation and amortization	75.0	69.7	64.8
Capital expenditures	24.7	29.4	33.6
Control Products and Solutions [Member]
Segment Reporting Information [Line Items]
Identifiable assets	2,034.6	2,078.1	2,273.7
Depreciation and amortization	77.3	70.3	65.9
Capital expenditures	$ 41.5	$ 56.8	$ 51.2