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Shareholders' Equity (Narrative) (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
1 Months Ended 9 Months Ended
Oct. 31, 2011
Sep. 27, 2013
Sep. 28, 2012
Stockholders Equity [Line Items]      
Stock repurchase program approved amount $ 100.0    
Stock repurchased during period, shares   0 0
Restricted Stock Units (RSUs) [Member]
     
Stockholders Equity [Line Items]      
Restricted Stock Unit Award Vesting Period   3 years