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Income Taxes - Narrative (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Income Tax Disclosure [Abstract] |  |  |
Reduction in valuation allowance due to foreign tax credit carryforwards | $ (1.6) | $ (11.5) |
Deferred tax benefit due to re-valuation of deferred taxes from a change in enacted tax rates in the United Kingdom | 11.2 | 7.3 | 7.6
Effect of changes in tax law, rates | 1.40% | 2.00% | 2.10%
Temporary difference due to repatriation of assets from a sale or liquidation of the subsidiary | 47.7 |  |
Amount of deferred taxes not recognized | 17.9 |  |
State net operating loss carryforwards, expiration period | 15 years |  |
Foreign tax credit carryforwards, expiration period | 5 years |  |
Liability for uncertain tax positions including interest and related charges | 20.4 | 22.6 | 21.2
Accrued income tax interest and related charges | 1.7 | 2.2 | 1.6
Unrecognized tax benefits that, if recognized, would affect effective tax rate | 17.2 | 19.4 | 12.6
Reductions for prior years' tax provisions | 0.1 | 5.4 | 0
Additions based on prior years' tax positions | $ 0 | $ 5.2 | $ 0

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- Definition Represents the temporary difference due to repatriation of assets from a sale or liquidation of the subsidiary. + References No definition available. + Details
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- Definition Represents the deferred tax expense (benefit) due to revaluation of deferred taxes as a result of a reduction in corporate tax rates in the United Kingdom. + References No definition available. + Details
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- Definition Represents the amount of the temporary difference for which a deferred tax has not been provided because of repatriation of assets from a sale or liquidation of the subsidiary. + References No definition available. + Details
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- Definition The gross amount of unrecognized tax benefits, including interest and related charges, pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. + References No definition available. + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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