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Income Taxes (Effective Income Tax Rate Reconciliation) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Tax Disclosure [Abstract]      
Income tax expense (benefit) at Federal statutory tax rate $ 32.0 $ 37.8 $ 28.0
Foreign tax rate differential 0.1 (3.9) (3.2)
Foreign withholding taxes 3.4 4.9 3.4
Change in valuation allowance 5.3 9.5 10.5
Change in uncertain tax positions (4.8) (11.4) 12.7
Nondeductible / nontaxable items 1.9 6.4 (10.0)
Other (net) 0.7 2.6 (5.7)
Income Tax Expense (Benefit) $ 38.6 [1] $ 45.9 [1] $ 35.7 [1]
[1] See Note 22 - Restatement of Consolidated Financial Statements