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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 01, 2011
Jul. 02, 2010
Jul. 01, 2011
Jul. 02, 2010
Income Taxes (Textuals) [Abstract]        
Income Tax Provision $ 31.2 $ 23.1 $ 57.8 $ 27.0
Effective income tax rate 37.50% 40.00% 37.50% 40.00%
Statutory corporate federal tax rate     35.00%