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Income Taxes (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Roll-forward of unrecognized tax benefits and associated accrued interest and penalties |  |  |
Opening balance at January 1 | $ 12.6 | $ 8.6 | $ 19.4
Additions related to tax positions taken in the current period | 0.2 | 5.2 | 0
Additions for tax positions of prior periods | 0.2 | 0.7 | 2.1
Reductions for tax positions of prior periods |  | (1.9) |
Reductions due to lapsed statutes of limitations | (0.2) |  |
Settlements |  |  | (12.9)
Closing balance at December 31 | 12.8 | 12.6 | 8.6
Current | (3.0) | (3.2) | (2.2)
Non-current | 9.8 | 9.4 | 6.4
Interest and Penalties [Member] |  |  |
Roll-forward of unrecognized tax benefits and associated accrued interest and penalties |  |  |
Opening balance at January 1 | 0.4 | 0.3 | 3.8
Additions related to tax positions taken in the current period | 0 | 0 | 0
Additions for tax positions of prior periods | 0.2 | 0.2 | 0.1
Reductions for tax positions of prior periods |  | (0.1) |
Reductions due to lapsed statutes of limitations | 0 |  |
Settlements |  |  | (3.6)
Closing balance at December 31 | 0.6 | 0.4 | 0.3
Current | (0.3) | (0.3) | (0.2)
Non-current | 0.3 | 0.1 | 0.1
Unrecognized Tax Benefits [Member] |  |  |
Roll-forward of unrecognized tax benefits and associated accrued interest and penalties |  |  |
Opening balance at January 1 | 12.2 | 8.3 | 15.6
Additions related to tax positions taken in the current period | 0.2 | 5.2 | 0
Additions for tax positions of prior periods | 0 | 0.5 | 2.0
Reductions for tax positions of prior periods |  | (1.8) |
Reductions due to lapsed statutes of limitations | (0.2) |  |
Settlements |  |  | (9.3)
Closing balance at December 31 | 12.2 | 12.2 | 8.3
Current | (2.7) | (2.9) | (2.0)
Non-current | $ 9.5 | $ 9.3 | $ 6.3

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- Definition The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a -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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