Investments in Unconsolidated Affiliates Hamer (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Jun. 30, 2015	Sep. 30, 2016	Sep. 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	$ 3.9			$ 0.0	$ 18.0
Hamer, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity in earnings of unconsolidated affiliates, net of tax			$ 1.1	$ 1.6