Other Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Other current liabilities
Unrealized losses on foreign exchange contracts (Note 8)	$ 16.4	$ 5.8
Product warranty obligations (Note 7)	27.9	34.1	$ 36.9
Taxes other than income taxes	34.9	37.2
Accrued interest	16.9	15.6
Income taxes payable	50.9	41.0
Other	61.0	54.6
Other current liabilities	$ 208.0	$ 188.3