EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Aug. 15, 2020	Aug. 17, 2019	Aug. 15, 2020	Aug. 17, 2019
EARNINGS PER COMMON SHARE
Net earnings numerator (basic)	$ 809	$ 294	$ 2,006	$ 1,057
Net earnings numerator (diluted)	$ 809	$ 294	$ 2,006	$ 1,057
Average number of common shares used in basic calculation	777	800	779	799
Net earnings attributable to The Kroger Co. per basic common share	$ 1.04	$ 0.37	$ 2.58	$ 1.32
Dilutive effect of stock options (in shares)	9	5	8	6
Average number of common shares used in diluted calculation	786	805	787	805
Net earnings attributable to The Kroger Co. per diluted common share	$ 1.03	$ 0.37	$ 2.55	$ 1.31
Undistributed and distributed earnings to participating securities	$ 10	$ 3	$ 25	$ 12
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share	9	27	10	24