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Earnings Per Share (Narrative) (Detail) (Stock Option [Member])
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jul. 01, 2012
Jun. 30, 2013
Jul. 01, 2012
Stock Option [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Shares considered anti-dilutive and excluded from computation 1.2 2.1 1.3 2.3