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Income Taxes (Effective Income Tax Rate Reconciliation) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]      
Income tax expense (benefit) at Federal statutory tax rate $ 30.4 $ 32.0 $ 37.8
Foreign tax rate differential (0.2) 0.1 (3.9)
Foreign withholding taxes 4.7 3.4 4.9
Change in valuation allowance 31.2 5.3 9.5
Change in uncertain tax positions 11.7 (4.8) (11.4)
Nondeductible / nontaxable items (0.3) 1.9 6.4
Other (net) 1.1 0.7 2.6
Income Tax Expense (Benefit) $ 78.6 [1] $ 38.6 [1] $ 45.9 [1]
[1] See Note 23 - Restatement of Consolidated Financial Statements