EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	4 Months Ended
May 25, 2019	May 26, 2018
EARNINGS PER COMMON SHARE
Net earnings numerator (basic)	$ 764	$ 2,005
Net earnings numerator (diluted)	$ 764	$ 2,005
Average number of common shares used in basic calculation	798	839
Net earnings attributable to The Kroger Co. per basic common share	$ 0.96	$ 2.39
Dilutive effect of stock options (in shares)	7	7
Average number of common shares used in diluted calculation	805	846
Net earnings attributable to The Kroger Co. per diluted common share	$ 0.95	$ 2.37
Undistributed and distributed earnings to participating securities	$ 8	$ 21
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share	16	17

The amount of undistributed and distributed earnings to participating securities for the period.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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