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Earnings per Share (Tables)
 4 Months Ended
Jan. 19, 2014
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
A reconciliation of the numerators and denominators of the basic and diluted earnings per share calculations follows (in millions, except per share amounts):
 
Sixteen weeks ended
 
January 19,
2014
 
January 20,
2013
Net income (numerator for basic and diluted earnings per share)
$
158

 
$
146

 
 
 
 
Weighted average common shares outstanding
(denominator for basic earnings per share)
372.3

 
370.8

Potential common shares outstanding:
 
 
 
Incremental shares from assumed exercise of stock options
3.5

 
3.5

Weighted average common shares outstanding and
potential additional common shares outstanding
(denominator for diluted earnings per share)
375.8

 
374.3

 
 
 
 
Basic earnings per share
$
0.42

 
$
0.39

 
 
 
 
Diluted earnings per share
$
0.42

 
$
0.39