Discontinued Operations (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2015
Earn-out incentive payment payable over two years		$ 91.0
Proceeds from sale of businesses, net		88.3
Net of expenses and gains		$ 54.9
Deferred tax assets	$ 14.1		$ 12.9
Polymer Additives [Member]
Proceeds from sale of businesses, net	153.5
Net of expenses and gains	72.7
Proceeds from sale of Polymer Additives, net	$ 149.5