Segments - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before income taxes	$ 45.2	$ 47.9
Interest expense, net	50.1	50.0
Depreciation and amortization	76.0	72.6
EBITDA	171.3	170.5
Exchange losses, net	7.5	8.7
Long-term employee benefit plan adjustments	0.6	0.2
Termination benefits and other employee related costs	1.9	3.7
Consulting and advisory fees	3.0	3.1
Offering costs	0.0	1.4
Stock-based compensation	10.2	1.8
Other adjustments	1.8	(3.9)
Dividends paid to noncontrolling interests	(1.5)	(3.5)
Adjusted EBITDA	$ 194.8	182.0
Equity Method Investee [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equity method investments, remeasurement gain		$ 5.4