Income Taxes - Reconciliation of effective tax rate (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation in dollars [Abstract]
Statutory U.S. federal income tax	$ 44.8	$ 80.2	$ 114.9
State income taxes, net of federal benefit	1.7	4.5	7.9
Foreign repatriation, net of foreign tax credits	(16.0)	48.1	0
Foreign tax differential	(12.3)	(9.7)	(9.4)
Change in valuation allowance	20.4	(2.8)	(5.9)
Uncertain tax positions	4.7	2.6	4.1
Subpart F income	1.5	4.1	3.2
Manufacturing deduction	0.1	(3.8)	(5.0)
Permanent and other	4.2	(0.8)	(1.0)
Total income tax provision	$ 49.1	$ 122.4	$ 108.8
Reconciliation in percentages [Abstract]
Statutory U.S. federal income tax (in hundredths)	35.00%	35.00%	35.00%
State income taxes, net of federal benefit (in hundredths)	1.30%	2.00%	2.40%
Foreign repatriation, net of foreign tax credits (in hundredths)	(12.60%)	21.00%	0.00%
Foreign tax differential (in hundredths)	(9.60%)	(4.20%)	(2.90%)
Change in valuation allowance (in hundredths)	15.90%	(1.20%)	(1.80%)
Uncertain tax positions (in hundredths)	3.70%	1.10%	1.20%
Subpart F income (in hundredths)	1.20%	1.80%	1.00%
Manufacturing deduction (in hundredths)	0.00%	(1.70%)	(1.50%)
Permanent and other (in hundredths)	3.50%	(0.40%)	(0.30%)
Effective income tax provision (in hundredths)	38.40%	53.40%	33.10%