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EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Nov. 06, 2021	Nov. 07, 2020	Nov. 06, 2021	Nov. 07, 2020
EARNINGS PER COMMON SHARE
Net earnings numerator (basic)	$ 478	$ 625	$ 1,079	$ 2,631
Net earnings numerator (diluted)	$ 478	$ 625	$ 1,079	$ 2,631
Average number of common shares used in basic calculation	742	772	747	777
Net earnings attributable to The Kroger Co. per basic common share	$ 0.64	$ 0.81	$ 1.44	$ 3.39
Dilutive effect of stock options (in shares)	10	8	10	8
Average number of common shares used in diluted calculation	752	780	757	785
Net earnings attributable to The Kroger Co. per diluted common share	$ 0.64	$ 0.80	$ 1.43	$ 3.35
Undistributed and distributed earnings to participating securities	$ 5	$ 6	$ 11	$ 31
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share	1	8	3	9

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