Investments in Unconsolidated Affiliates Hamer (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Realized Gain (Loss) on Disposal		$ 20.0
Equity in earnings of unconsolidated affiliates, net of tax	$ 0.0	6.8	$ 0.0	$ 14.1
Hamer, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity in earnings of unconsolidated affiliates, net of tax		$ 1.1		$ 1.6