EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Aug. 12, 2023	Aug. 13, 2022	Aug. 12, 2023	Aug. 13, 2022
EARNINGS PER COMMON SHARE
Net earnings (loss) numerator (basic)	$ (179)	$ 724	$ 775	$ 1,381
Net earnings (loss) numerator (diluted)	$ (179)	$ 724	$ 775	$ 1,381
Average number of common shares used in basic calculation	719	716	718	720
Net earnings (loss) attributable to The Kroger Co. per basic common share	$ (0.25)	$ 1.01	$ 1.08	$ 1.92
Dilutive effect of stock options (in shares)	0	9	7	10
Average number of common shares used in diluted calculation	719	725	725	730
Net earnings (loss) attributable to The Kroger Co. per diluted common share	$ (0.25)	$ 1.00	$ 1.07	$ 1.89
Undistributed and distributed earnings (loss) to participating securities	$ (1)	$ 7	$ 7	$ 13
Shares excluded from the earnings (loss) per share calculation due to anti-dilutive effect on earnings per share		2	3	1