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Acquisitions - SecureInfo Corporation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended
Dec. 29, 2013
Sep. 29, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 30, 2012
Sep. 30, 2012
Jun. 24, 2012
Mar. 25, 2012
Dec. 29, 2013
Dec. 30, 2012
Dec. 25, 2011
Nov. 15, 2011
SecureInfo Corporation
Dec. 25, 2011
SecureInfo Corporation
Nov. 15, 2011
SecureInfo Corporation
Earnout
Business Acquisition [Line Items]                            
Purchase price                       $ 20.3   $ 1.5
Revenues                 100.9 116.2 54.3   1.9  
Operating income (loss) $ 5.4 $ 6.1 $ 8.9 $ 11.4 $ (80.3) $ 14.1 $ 7.4 $ 9.1 $ 31.8 $ (49.7) $ 29.5   $ 0.1