Employee Benefit Plans (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Investments in the pension plan measured at fair value
Total investments	$ 115.8	$ 108.4	$ 90.3
Information related to the Company's pension funds cash flow
Employer contributions	0.7	7.8
Benefit Payments	4.2	3.2
Expected employer contributions in next fiscal year	0.6
Expected benefit payments to be paid by the pension plans
During fiscal year ending December 31, 2013	4.5
During fiscal year ending December 31, 2014	4.9
During fiscal year ending December 31, 2015	5.3
During fiscal year ending December 31, 2016	5.6
During fiscal year ending December 31, 2017	6.0
During fiscal years ending December 31, 2018 through December 31, 2022	34.9
Money market funds
Investments in the pension plan measured at fair value
Total investments	1.5	4.9
U.S. equity securities
Investments in the pension plan measured at fair value
Total investments	8.3	8.0
Non-U.S. equity securities
Investments in the pension plan measured at fair value
Total investments	1.4	2.3
Other equity securities
Investments in the pension plan measured at fair value
Total investments	1.3	4.1
U.S. government debt securities
Investments in the pension plan measured at fair value
Total investments	18.8	19.9
U.S. and non-U.S. corporate debt securities
Investments in the pension plan measured at fair value
Total investments	79.0	63.3
Other investments
Investments in the pension plan measured at fair value
Total investments	5.5	5.9
Quoted Prices in Active Markets for Identical Assets (Level 1)
Investments in the pension plan measured at fair value
Total investments	35.4	39.2
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds
Investments in the pension plan measured at fair value
Total investments	1.2
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. equity securities
Investments in the pension plan measured at fair value
Total investments	8.3	8.0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. equity securities
Investments in the pension plan measured at fair value
Total investments	1.4	2.3
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other equity securities
Investments in the pension plan measured at fair value
Total investments	1.3	4.1
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government debt securities
Investments in the pension plan measured at fair value
Total investments	18.8	19.9
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other investments
Investments in the pension plan measured at fair value
Total investments	4.4	4.9
Significant Other Observable Inputs (Level 2)
Investments in the pension plan measured at fair value
Total investments	80.4	69.2
Significant Other Observable Inputs (Level 2) | Money market funds
Investments in the pension plan measured at fair value
Total investments	0.3	4.9
Significant Other Observable Inputs (Level 2) | U.S. and non-U.S. corporate debt securities
Investments in the pension plan measured at fair value
Total investments	79.0	63.3
Significant Other Observable Inputs (Level 2) | Other investments
Investments in the pension plan measured at fair value
Total investments	$ 1.1	$ 1.0