EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	4 Months Ended
	May 20, 2023	May 21, 2022
EARNINGS PER COMMON SHARE
Net earnings numerator (basic)	$ 954	$ 657
Net earnings numerator (diluted)	$ 954	$ 657
Average number of common shares used in basic calculation	717	722
Net earnings attributable to The Kroger Co. per basic common share	$ 1.33	$ 0.91
Dilutive effect of stock options (in shares)	7	11
Average number of common shares used in diluted calculation	724	733
Net earnings attributable to The Kroger Co. per diluted common share	$ 1.32	$ 0.90
Undistributed and distributed earnings to participating securities	$ 8	$ 7
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share	3	1