Other Current Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013
Other current liabilities
Unrealized losses on foreign exchange contracts	$ 29.6	$ 5.8
Product warranty obligations	30.5	34.1	$ 36.7	$ 36.9
Taxes other than income taxes	35.0	37.2
Accrued interest	16.2	15.6
Dividends payable	87.2	0.0
Income taxes payable	34.1	41.0
Other	45.5	54.6
Other current liabilities	$ 278.1	$ 188.3