Business Segments - Reconciliation of Segment Operating Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Reconciliation of reportable segment operating income to consolidated income before income taxes
Segment operating income (loss) from continuing operations	$ 50.3	$ 18.1
Interest expense	(165.7)	(164.3)
Earnings from equity investments	3.2	3.1
Other income (expense), net	0.7	(5.6)
Net loss from continuing operations before income taxes	(111.5)	(148.7)
Operating Segments
Reconciliation of reportable segment operating income to consolidated income before income taxes
Segment operating income (loss) from continuing operations	102.9	75.2
Unallocated corporate costs
Reconciliation of reportable segment operating income to consolidated income before income taxes
Segment operating income (loss) from continuing operations	$ (52.6)	$ (57.1)