v2.4.0.6
Income Taxes - Schedule of Current and Deferred Income Tax Liabilities (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]    
Current Income Tax Liabilities $ 9.8 $ 0
Deferred Income Tax Liabilities 2.3 0
Unrecognized Tax Benefits 6.1 6.2
Liabilities for Income Taxes $ 18.2 $ 6.2