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Shareholders' Equity (Narrative) (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
6 Months Ended
Jul. 01, 2016
Jul. 03, 2015
Aug. 31, 2015
Aug. 31, 2014
2014 Stock Repurchase Program [Member]        
Equity, Class of Stock [Line Items]        
Stock repurchase program approved amount       $ 300.0
Stock Repurchased During Period, Shares   2.9    
Common Stock Acquired, Average Cost Per Share   $ 24.74    
Stock Repurchased During Period, Value   $ 73.0    
2015 Stock Repurchase Program [Member]        
Equity, Class of Stock [Line Items]        
Stock repurchase program approved amount     $ 400.0  
Stock Repurchased During Period, Shares 3.8      
Common Stock Acquired, Average Cost Per Share $ 24.21      
Stock Repurchased During Period, Value $ 92.2      
Stock Repurchase Program, Remaining Authorized Repurchase Amount 157.7      
Retained Earnings [Member]        
Equity, Class of Stock [Line Items]        
Stock Repurchased During Period, Value $ 72.9