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EARNINGS PER COMMON SHARE (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Aug. 13, 2016
Aug. 15, 2015
Aug. 13, 2016
Aug. 15, 2015
EARNINGS PER COMMON SHARE        
Net earnings attributable to The Kroger Co. per basic common share $ 380 $ 429 $ 1,070 $ 1,042
Average number of common shares used in basic calculation 943 963 949 966
Net earnings attributable to The Kroger Co. per basic common share $ 0.40 $ 0.44 $ 1.13 $ 1.08
Dilutive effect of stock options (in shares) 16 14 17 15
Net earnings attributable to The Kroger Co. per diluted common share $ 380 $ 429 $ 1,070 $ 1,042
Average number of common shares used in diluted calculation 959 977 966 981
Net earnings attributable to The Kroger Co. per diluted common share $ 0.40 $ 0.44 $ 1.11 $ 1.06
Undistributed and distributed earnings to participating securities $ 3 $ 4 $ 9 $ 10
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share 8 2 6 1