EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 29, 2022	Jan. 30, 2021	Feb. 01, 2020
EARNINGS PER COMMON SHARE
Net earnings numerator (basic)	$ 1,639	$ 2,556	$ 1,640
Net earnings numerator (diluted)	$ 1,639	$ 2,556	$ 1,640
Average number of common shares used in basic calculation	744.0	773.0	799.0
Net earnings attributable to The Kroger Co. per basic common share	$ 2.20	$ 3.31	$ 2.05
Dilutive effect of stock options (in shares)	10.0	8.0	6.0
Average number of common shares used in diluted calculation	754.0	781.0	805.0
Net earnings attributable to The Kroger Co. per diluted common share	$ 2.17	$ 3.27	$ 2.04
Undistributed and distributed earnings to participating securities	$ 16	$ 29	$ 19
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share	2.4	9.1	18.4