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EARNINGS PER COMMON SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Aug. 16, 2014 | Aug. 17, 2013 | Aug. 16, 2014 | Aug. 17, 2013
EARNINGS PER COMMON SHARE |  |  |  |
Net earnings attributable to The Kroger Co. per basic common share | $ 343 | $ 315 | $ 840 | $ 791
Average number of common shares used in basic calculation | 485 | 515 | 494 | 515
Net earnings attributable to The Kroger Co. per basic common share (in dollars per share) | $ 0.71 | $ 0.61 | $ 1.70 | $ 1.54
Dilutive effect of stock options (in shares) | 6 | 6 | 6 | 5
Net earnings attributable to The Kroger Co. per diluted common share | 343 | 315 | 840 | 791
Average number of common shares used in diluted calculation | 491 | 521 | 500 | 520
Net earnings attributable to The Kroger Co. per diluted common share (in dollars per share) | $ 0.70 | $ 0.60 | $ 1.68 | $ 1.52
Undistributed and distributed earnings to participating securities | $ 4 | $ 2 | $ 8 | $ 7
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share | 2 | 2 | 2 | 1

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