EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	4 Months Ended
	May 24, 2025	May 25, 2024
EARNINGS PER COMMON SHARE
Net earnings numerator (basic)	$ 860	$ 940
Net earnings numerator (diluted)	$ 860	$ 940
Average number of common shares used in basic calculation	660	721
Net earnings attributable to The Kroger Co. per basic common share	$ 1.3	$ 1.3
Dilutive effect of stock options (in shares)	4	6
Average number of common shares used in diluted calculation	664	727
Net earnings attributable to The Kroger Co. per diluted common share	$ 1.29	$ 1.29
Undistributed and distributed earnings (loss) to participating securities	$ 6	$ 7
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share	1	4