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Common stock transactions (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Dec. 05, 2017
Aug. 24, 2016
Nov. 03, 2017
Aug. 04, 2017
May 05, 2017
Oct. 28, 2016
Nov. 03, 2017
Oct. 28, 2016
Common stock transactions                
Cash dividend paid (in dollars per share)     $ 0.26 $ 0.26 $ 0.26 $ 0.25 $ 0.78 $ 0.75
Cash dividend declared (in dollars per share) $ 0.26              
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     $ 5,000.0       $ 5,000.0  
Remaining authorization available under the common stock repurchase program     $ 634.6       $ 634.6  
Shares acquired under share repurchase program             4.0 8.2
Aggregate purchase price             $ 298.7 $ 679.4