Other Current Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014
Other current liabilities
Unrealized losses on foreign exchange contracts	$ 14.8	$ 16.4
Product warranty obligations	28.1	27.9	$ 32.5	$ 34.1
Taxes other than income taxes	43.6	34.9
Accrued interest	16.9	16.9
Income taxes payable	30.9	50.9
Other	52.3	61.0
Other current liabilities	$ 186.6	$ 208.0