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Consolidated Statements of Stockholders' Equity and Comprehensive Income (Parenthetical) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 27, 2011
Dec. 28, 2010
Dec. 29, 2009
Consolidated Statements of Stockholders' Equity and Comprehensive Income      
Unrealized gain (loss) on derivatives, tax (in dollars) $ 0.8 $ 0.9 $ 1.0
Dividends paid per share (in dollars per share) $ 0.24    
Dividends declared per share (in dollars per share) $ 0.08