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Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2012 | Dec. 31, 2011
Deferred Tax Assets |  |  |
State net operating loss carryforwards | $ 25.9 | $ 25.9 | $ 26.5
Foreign tax credit carryforwards | 14.2 | 14.2 | 15.1
Deferred compensation | 20.5 | 20.5 | 17.5
Tax benefit of uncertain tax positions | 17.1 | 17.1 | 11.6
Accrued expenses | 3.7 | 3.7 | 11.6
Capital loss carryforwards | 1.5 | 1.5 | 1.5
Total deferred tax assets | 82.9 | 82.9 | 83.8
Valuation allowance | (30.4) | (30.4) | (35.6)
Deferred tax assets, net of valuation allowance | 52.5 | 52.5 | 48.2
Deferred Tax Liabilities |  |  |
Intangible asset amortization | (245.0) | (245.0) | (247.1)
Convertible securities interest | (180.0) | (180.0) | (171.1)
Non-deductible intangible amortization | (123.2) | (123.2) | (127.2)
Deferred revenue | (4.1) | (4.1) | (5.6)
Other | (3.0) | (3.0) | (3.2)
Total deferred tax liabilities | (555.3) | (555.3) | (554.2)
Net deferred tax liability | (502.8) | (502.8) | (506.0)
State net operating loss carryforwards, expiration period (in years) |  | 15 years |
Foreign tax credit carryforwards, expiration period (in years) |  | 10 years |
Liability for uncertain tax positions including interest and related charges | 27.1 | 27.1 |
Accrued income tax interest and related charges | 2.1 | 2.1 |
Liability for uncertain tax positions for foreign exchange | 16.0 | 16.0 |
Increase (Decrease) related to foreign exchange rates | $ 5.1 |  |

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- Definition The sum of the tax effects as of the balance sheet date of the amount of the estimated future tax deductions arising from all employee compensation and benefits costs, which can only be deducted for tax purposes when the actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6969291&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph b -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 -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph c -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 15, 16 -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 -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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant