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Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Consolidated Statements of Comprehensive Income [Abstract] |  |  |  |  |
Net income | $ 68.3 | $ 48.9 |  | $ 73.7 |
Changes in cumulative translation adjustment | 7.2 | (3.9) |  | (15.6) |
Changes in unrealized gains/(losses) on derivative instruments, net of tax of $0.0 million, $0.3million and $0.0 million, respectively | (0.1) | (0.7) |  | 0 |
Amortization of actuarial net losses, net of tax of $(0.3) million, $(0.1) million and $(1.4) million, respectively | 1.0 | 0.2 |  | 3.8 |
Gain on pension plan amendment, net of tax of $0.0 million, $0.0 million and $(4.8) million, respectively | 0 | 0 |  | 12.3 |
Deferred taxes | 0 | (2.6) | [1],[2] | (2.3) | [3],[4]
Amortization of prior service credit, net of tax | (1.0) | (0.9) |  | (0.6) |
Actuarial net (losses)/gains arising during the year, net of tax of $17.8 million, $(6.6) million and $(26.6) million, respectively | (58.5) | 19.5 |  | 71.9 |
Total comprehensive income | $ 16.9 | $ 60.5 |  | $ 143.2 |
[1] | Impact on deferred taxes of a change in the associated tax rate on the unrecognized actuarial net losses of $94.8 million (net of deferred taxes of $35.1 million) previously recognized in other comprehensive loss.
[2] | Impact on deferred taxes during the year ended December 31, 2011 of a change in the associated tax rate on the unrecognized actuarial net losses of $94.8 million (net of deferred taxes of $35.1 million) previously recognized in other comprehensive loss.
[3] | Impact on deferred taxes of a change in the associated tax rate on the unrecognized actuarial net losses of $164.6 million (net of deferred taxes of $64.1 million) previously recognized in other comprehensive loss.
[4] | Impact on deferred taxes during the year ended December 31, 2010 of a change in the associated tax rate on the unrecognized actuarial net losses of $164.6 million (net of deferred taxes of $64.1 million) previously recognized in other comprehensive loss.

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- Definition The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) -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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 30 -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. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=16317811 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e557-108580 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A5 -Appendix A + Details
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- Definition Amount of gain (loss) from a decision to temporarily deviate from the substantive plan, or from a change in benefit obligation or plan asset value from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover or salary scale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Gain or Loss -URI http://asc.fasb.org/extlink&oid=6514294 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Glossary Gain or Loss -URI http://asc.fasb.org/extlink&oid=6749293 + Details
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