SUBSEQUENT EVENT (Details) - USD ($) $ / shares in Units, $ in Millions		4 Months Ended
	Jun. 25, 2015	May. 23, 2015	May. 24, 2014	Jan. 31, 2015
Subsequent Event
Common shares, par per share (in dollars per share)		$ 1		$ 1
Net earnings attributable to The Kroger Co. per basic common share		$ 613	$ 497
Average number of common shares used in basic calculation		484,000,000	501,000,000
Net earnings attributable to The Kroger Co. per basic common share		$ 1.27	$ 0.99
Dilutive effect of stock options (in shares)		8,000,000	6,000,000
Net earnings attributable to The Kroger Co. per diluted common share		$ 613	$ 497
Average number of common shares used in diluted calculation		492,000,000	507,000,000
Net earnings attributable to The Kroger Co. per diluted common share		$ 1.25	$ 0.98
Subsequent Event
Subsequent Event
Stock split conversion ratio	2
Common stock dividend rate percentage	100.00%
Number of additional common shares received as a result of the stock split	1
Common shares, par per share (in dollars per share)	$ 1
Subsequent Event | Pro-forma
Subsequent Event
Net earnings attributable to The Kroger Co. per basic common share		$ 613	$ 497
Average number of common shares used in basic calculation		969,000,000	1,002,000,000
Net earnings attributable to The Kroger Co. per basic common share		$ 0.63	$ 0.50
Dilutive effect of stock options (in shares)		14,000,000	12,000,000
Net earnings attributable to The Kroger Co. per diluted common share		$ 613	$ 497
Average number of common shares used in diluted calculation		983,000,000	1,014,000,000
Net earnings attributable to The Kroger Co. per diluted common share		$ 0.62	$ 0.49