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EARNINGS PER COMMON SHARE (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 4 Months Ended 12 Months Ended
Jan. 28, 2012
Nov. 05, 2011
Aug. 13, 2011
Jan. 29, 2011
Nov. 06, 2010
Aug. 14, 2010
May 21, 2011
May 22, 2010
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
EARNINGS PER COMMON SHARE                      
Net earnings attributable to The Kroger Co. per basic common share                 $ 598 $ 1,109 $ 69
Average number of common shares used in basic calculation (in shares) 565 583 596 627 633 637 608 641 590 635 647
Net earnings attributable to The Kroger Co. per basic common share (in dollars per share) $ (0.54) $ 0.33 $ 0.47 $ 0.44 $ 0.32 $ 0.41 $ 0.71 $ 0.58 $ 1.01 $ 1.75 $ 0.11
Dilutive effect of stock options (in shares)                 3 3 3
Net earnings attributable to The Kroger Co. per diluted common share                 598 1,109 69
Average number of common shares used in diluted calculation (in shares) 565 586 600 631 636 640 612 645 593 638 650
Net earnings attributable to The Kroger Co. per diluted common share (in dollars per share) $ (0.54) $ 0.33 $ 0.46 $ 0.44 $ 0.32 $ 0.41 $ 0.70 $ 0.58 $ 1.01 $ 1.74 $ 0.11
Undistributed and distributed earnings to participating securities                 $ 4 $ 7 $ 1
Shares excluded from the earnings per share calculation due to anti-dilutive effect on earnings per share                 12.2 21.2 20.2