Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 jurisdictions	Dec. 31, 2011	Dec. 31, 2010
Income Taxes
Net change in the total valuation allowance	$ 10.0	$ 2.9
Tax credit carryforwards for U.S. tax purposes	35.4
Operating loss carryforwards
Reduction of uncertain tax benefits due to the favorable settlement		6.7
Activity related to unrecognized tax benefit
Balance at the beginning of the period	12.5	20.1	19.4
Additions based on tax positions related to the current year	1.7	1.5	2.6
Additions/(Reductions) for tax positions of prior years	19.0	(1.1)
Decreases relating to settlements with tax authorities / reduction of uncertain tax benefits due to the favorable settlement		(6.7)
Expiration of the statute of limitations for the assessment of taxes	(0.8)	(1.6)	(0.5)
Other, including currency translation	0.2	0.3	(1.4)
Balance at the end of the period	32.6	12.5	20.1
Interest expense (income) related to unrecognized tax benefit	0.1	(0.1)	(1.4)
Interest accrued on unrecognized tax benefits	0.9	0.8
Interest related to the unrecognized tax benefit reversed	0.1	0.2
Number of jurisdictions in which the company settled an audit with foreign tax authorities	1
Portion of unrecognized tax benefit, that if recognized, would impact effective tax rate	32.3
U.S. | Maximum
Operating loss carryforwards
Statute of limitations on years that can be open for examination	5
U.S. | Minimum
Operating loss carryforwards
Statute of limitations on years that can be open for examination	3
Foreign country
Operating loss carryforwards
Net operating loss carryforwards	194.8
Valuation allowance on net operating losses	172.3
Reduction of uncertain tax benefits due to the favorable settlement	5.5
Activity related to unrecognized tax benefit
Decreases relating to settlements with tax authorities / reduction of uncertain tax benefits due to the favorable settlement	$ (5.5)
Foreign country | Maximum
Operating loss carryforwards
Statute of limitations on years that can be open for examination	5
Foreign country | Minimum
Operating loss carryforwards
Statute of limitations on years that can be open for examination	3
Spain
Operating loss carryforwards
Carryforward period (in years)	18
China
Operating loss carryforwards
Carryforward period (in years)	5