EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Aug. 14, 2021	Aug. 15, 2020	Aug. 14, 2021	Aug. 15, 2020
EARNINGS PER COMMON SHARE
Net earnings numerator (basic)	$ 462	$ 809	$ 601	$ 2,006
Net earnings numerator (diluted)	$ 462	$ 809	$ 601	$ 2,006
Average number of common shares used in basic calculation	746	777	750	779
Net earnings attributable to The Kroger Co. per basic common share	$ 0.62	$ 1.04	$ 0.80	$ 2.58
Dilutive effect of stock options (in shares)	9	9	8	8
Average number of common shares used in diluted calculation	755	786	758	787
Net earnings attributable to The Kroger Co. per diluted common share	$ 0.61	$ 1.03	$ 0.79	$ 2.55
Undistributed and distributed earnings to participating securities	$ 5	$ 10	$ 6	$ 25
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share	2	9	8	10