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Repurchases of Common Stock (Details) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Sep. 29, 2012
Oct. 01, 2011
Repurchases of Common Stock [Abstract]        
Share repurchase program     $ 290.0  
Shares repurchased and retired (in shares) 400 0 800 0
Shares repurchased and retired, amount 10.0   20.0  
Stock Repurchase Program, Remaining Authorized Repurchase Amount     $ 186.7