Business Segment Information (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Identifiable assets	$ 5,844.6	$ 5,636.5	$ 5,284.9
Depreciation and amortization	145.2	138.6	131.3
Components of Identifiable assets Depreciation and amortization and Capital expenditures for property
Purchase accounting depreciation and amortization	19.3	19.8	19.8
Capital expenditures	146.2	139.6	120.1
Architecture and Software [Member]
Segment Reporting Information [Line Items]
Identifiable assets	1,653.4	1,648.4	1,608.4
Depreciation and amortization	68.1	61.6	60.0
Components of Identifiable assets Depreciation and amortization and Capital expenditures for property
Capital expenditures	31.5	24.6	28.1
Control Products and Solutions [Member]
Segment Reporting Information [Line Items]
Identifiable assets	2,200.0	2,270.7	2,116.1
Depreciation and amortization	57.7	57.1	51.4
Components of Identifiable assets Depreciation and amortization and Capital expenditures for property
Capital expenditures	52.8	55.3	38.2
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets	1,991.2	1,717.4	1,560.4
Depreciation and amortization	0.1	0.1	0.1
Components of Identifiable assets Depreciation and amortization and Capital expenditures for property
Capital expenditures	61.9	59.7	53.8
Operating Segments [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 125.9	$ 118.8	$ 111.5