Supplementary Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2015	Sep. 30, 2015
Supplementary Balance Sheet Information [Abstract]
Allowance for possible losses and discounts on trade receivables	$ 26.5	$ 26.0
Inventories:
Finished products	119.9	133.2
Raw materials and work in process	129.0	134.2
Total inventory	248.9	267.4
Accumulated depreciation of property, plant and equipment	610.9	598.0
Accumulated amortization of software and other intangible assets	$ 324.3	$ 304.4
Preferred stock, without par value:
Par value
Shares authorized	1,000,000	1,000,000
Shares issued	0	0
Common stock, without par value:
Par value
Shares authorized	199,000,000	199,000,000
Shares issued	88,457,634	88,457,634
Shares outstanding	65,299,252	65,165,896
Treasury shares	23,158,382	23,291,738