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Pension Plans (Details 3) (UK Plan [Member], Significant Unobservable Inputs (Level 3) [Member], Other assets [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
UK Plan [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other assets [Member] |  |
Reconciliation of the fair value of Plan assets |  |
Beginning balance | $ 28.1 | $ 23.3
Realized/unrealized gains/(losses): |  |
Relating to assets still held at the reporting date | 1.3 | 1.0
Relating to assets sold during the period | 0 | (0.5)
Purchases, issuances and settlements | 0.5 | 4.5
Exchange effect | 1.1 | (0.2)
Ending balance | $ 31.0 | $ 28.1

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- Definition Amount of purchases, sales, issues, and settlements (net) which have taken place in relation to assets measured at fair value on a recurring basis using unobservable inputs (level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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