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Common stock transactions (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
May 29, 2018
Mar. 14, 2018
May 04, 2018
May 05, 2017
Common stock transactions        
Cash dividend paid (in dollars per share)     $ 0.29 $ 0.26
Subsequent event        
Common stock transactions        
Cash dividend declared (in dollars per share) $ 0.29      
Common Stock | Pursuant to Authorized Repurchase Program        
Common stock transactions        
Common stock repurchase program, increase in the authorized amount   $ 1,000.0    
Common stock repurchase authorization     $ 6,000.0  
Remaining authorization available under the common stock repurchase program     $ 1,200.0  
Shares acquired under share repurchase program     1.6 1.3
Aggregate purchase price     $ 150.0 $ 88.8