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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. 12, 2017
Aug. 13, 2016
Aug. 12, 2017
Aug. 13, 2016
EARNINGS PER COMMON SHARE        
Net earnings attributable to The Kroger Co. per basic common share $ 350 $ 380 $ 651 $ 1,070
Average number of common shares used in basic calculation 897 943 907 949
Net earnings attributable to The Kroger Co. per basic common share $ 0.39 $ 0.40 $ 0.72 $ 1.13
Dilutive effect of stock options (in shares) 8 16 10 17
Net earnings attributable to The Kroger Co. per diluted common share $ 350 $ 380 $ 651 $ 1,070
Average number of common shares used in diluted calculation 905 959 917 966
Net earnings attributable to The Kroger Co. per diluted common share $ 0.39 $ 0.40 $ 0.71 $ 1.11
Undistributed and distributed earnings to participating securities $ 3 $ 3 $ 5 $ 9
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share 14 8 10 6