Other Current Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014
Other current liabilities
Unrealized losses on foreign exchange contracts	$ 19.3	$ 16.4
Product warranty obligations	27.0	27.9	$ 30.5	$ 34.1
Taxes other than income taxes	41.6	34.9
Accrued interest	16.2	16.9
Dividends payable	93.8	0.0
Income taxes payable	38.7	50.9
Other	57.3	61.0
Other current liabilities	$ 293.9	$ 208.0