Segments - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) before income taxes	$ 54,200,000	$ (10,800,000)	$ 107,300,000	$ 52,000,000
Interest expense, net	50,800,000	52,600,000	150,000,000	166,500,000
Depreciation and amortization	75,400,000	76,200,000	225,500,000	229,100,000
EBITDA	180,400,000	118,000,000	482,800,000	447,600,000
Inventory step-up	500,000	0	1,000,000	0
Financing costs	0	3,000,000	0	6,100,000
Foreign exchange remeasurement losses (gains)	23,700,000	59,600,000	90,200,000	45,100,000
Long-term employee benefit plan adjustments	(500,000)	(4,700,000)	(100,000)	(200,000)
Termination benefits and other employee related costs	800,000	3,200,000	19,300,000	9,100,000
Consulting and advisory fees	7,200,000	8,800,000	17,100,000	29,500,000
Transition-related costs	0	33,500,000	0	81,000,000
Offering costs	1,400,000	3,200,000	3,100,000	3,200,000
Other adjustments	3,700,000	2,600,000	14,800,000	13,600,000
Dividends paid to noncontrolling interests	(300,000)	0	(4,400,000)	(1,600,000)
Management fee expense	0	800,000	0	2,400,000
Asset impairment	0	0	30,600,000	0
Adjusted EBITDA	216,900,000	228,000,000	654,400,000	635,800,000
Subsidiaries [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Asset impairment			30,600,000
Carlyle Investment Management Llc [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Consulting and advisory fees				3,000,000
Management fee expense	0	800,000	0	2,400,000	$ 3,000,000
Senior Secured Credit Facilities [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Refinancing costs				3,100,000
Fair Value Adjustment to Inventory [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Inventory step-up	500,000		1,000,000
Equity Method Investee [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equity method investments, remeasurement gain			5,400,000
New Dollar Term Loan [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Repayments of debt				100,000,000
Loss on extinguishment of debt		(3,000,000)		(6,100,000)
Pension Plan [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Curtailment gain	$ 0	6,600,000	$ 0	6,600,000
Pension Plan [Member] | Selling, General and Administrative Expenses [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Curtailment gain		$ 6,600,000		$ 6,600,000