Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Current Liabilities [Abstract]
Deferred income	$ 14.4	$ 13.3
Other accrued expenses	23.1	22.4
Dividends payable	8.6	7.8	$ 7.0
Other	7.7	8.3
Other current liabilities	$ 53.8	$ 51.8