Income Taxes - Components of deferred tax assets and liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets [Abstract]
Stock-based compensation	$ 10.0	$ 11.7
Accrued expenses and other	53.7	10.6
Net operating losses	55.3	9.6
Inventories	4.6	3.5
Intangible assets	9.0	2.4
Property, plant and equipment	3.9	1.5
Total deferred tax assets	136.5	39.3
Valuation allowances	(39.4)	(0.1)
Total net deferred tax assets	97.1	39.2
Deferred tax liabilities [Abstract]
Foreign repatriation, net of foreign tax credits	0	(45.4)
Intangible assets	(261.9)	(21.8)
Property, plant and equipment	(62.5)	(13.1)
Accrued expenses and other	(4.3)	(3.7)
Total deferred tax liabilities	(328.7)	(84.0)
Net deferred tax liabilities	$ (231.6)	$ (44.8)