Basis of Presentation Basis of Presentation - Cequent Spinoff (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total	Total	Total
Presentation of spin-off costs [Domain]
Presentation of spin-off costs [Line Items]
Cash distribution received from Cequent spin-off	$ 214.5
Cequent Spin-off, one-time costs		$ 29.0	$ 30.0
Discontinued Operations [Member]
Presentation of spin-off costs [Line Items]
Debt financing costs			18.0
Deferred finance costs	9.0	9.0	9.0
Continuing Operations [Member]
Presentation of spin-off costs [Line Items]
Debt financing and extinguishment costs and deferred finance costs	3.0
Debt financing and extinguishment costs	2.0
Deferred Finance Costs, Noncurrent, Net	$ 1.0	$ 1.0	$ 1.0