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Earnings per share
6 Months Ended
Jul. 30, 2016
Earnings Per Share [Abstract]  
Earnings per share
Earnings per share
 
13 weeks ended
 
26 weeks ended
(in millions, except per share amounts)
July 30, 2016
 
August 1, 2015
 
July 30, 2016
 
August 1, 2015
Net income
$
81.9

 
$
62.2

 
$
228.7

 
$
181.0

Basic weighted average number of shares outstanding
77.1

 
79.7

 
77.8

 
79.8

Dilutive effect of share awards
0.1

 
0.2

 
0.1

 
0.2

Diluted weighted average number of shares outstanding
77.2

 
79.9

 
77.9

 
80.0

Earnings per share – basic
$
1.06

 
$
0.78

 
$
2.94

 
$
2.27

Earnings per share – diluted
$
1.06

 
$
0.78

 
$
2.94

 
$
2.26


The dilutive effect of share awards represents the potential impact of outstanding awards issued under the Company’s share-based compensation plans, including restricted shares and restricted stock units issued under the Omnibus Plan and stock options issued under the Share Saving Plans and the Executive Plans. The potential impact is calculated using the treasury stock method. The calculation of fully diluted earnings per share for the 13 and 26 weeks ended July 30, 2016 excludes awards of 207,046 shares (13 and 26 weeks ended August 1, 2015: 72,406 share awards) on the basis that their effect would be anti-dilutive.