v2.4.0.6
Effective Tax Rate Reconciliation (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Effective Tax Rate Reconciliation [Line Items]      
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 35.00% 35.00% 35.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes 2.20% 1.80% 1.20%
Effective Income Tax Rate Reconciliation, Tax Credits, Foreign (12.20%) (10.10%) (7.40%)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential (20.30%) (0.20%) 1.10%
Effective Income Tax Rate Reconciliation, Tax Contingencies (20.30%) (20.30%) 3.10%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance 0.70% (2.50%) 0.90%
Effective Income Tax Rate, Continuing Operations 11.70% 1.90% 33.30%
Income Tax Benefit Associated With Impairment Charges $ 76.2    
Resolution of Tax Contingencies Including Interet And Penalties, Impact on ETR, Amount 49.0 63.6  
Tax Adjustments, Settlements, and Unusual Provisions   8.2  
Deferred Tax Expense For Share Based Payments Awards   $ 6.7  
Tax Basis Differential On Goodwill Impairment [Member]
      
Effective Tax Rate Reconciliation [Line Items]      
Effective Income Tax Rate Reconciliation, Nondeductible Expense 38.00% 0.00% 0.00%
Stock Based Compensation ETR Impact [Member]
      
Effective Tax Rate Reconciliation [Line Items]      
Effective Income Tax Rate Reconciliation, Other Adjustments 1.50% 1.90% 1.70%
Other Insignificant Components of ETR [Member]
      
Effective Tax Rate Reconciliation [Line Items]      
Effective Income Tax Rate Reconciliation, Other Adjustments (12.90%) (3.70%) (2.30%)