QUARTERLY DATA (UNAUDITED) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended						4 Months Ended		12 Months Ended
	Jan. 31, 2015	Nov. 08, 2014	Aug. 16, 2014	Feb. 01, 2014	Nov. 09, 2013	Aug. 17, 2013	May 24, 2014	May 25, 2013	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Length of Quarter	84 days	84 days	84 days	84 days	84 days	84 days	112 days	112 days	364 days	364 days
Sales	$ 25,207	$ 24,987	$ 25,310	$ 23,222	$ 22,470	$ 22,686	$ 32,961	$ 29,997	$ 108,465	$ 98,375	$ 96,619
Merchandise costs, including advertising, warehousing, and transportation, excluding items shown separately below	19,547	19,764	20,136	18,397	17,866	18,059	26,065	23,817	85,512	78,138	76,726
Operating, general and administrative	4,119	3,954	3,920	3,558	3,537	3,506	5,168	4,593	17,161	15,196	14,849
Rent	162	162	166	147	138	139	217	189	707	613	628
Depreciation and amortization	467	456	444	402	395	387	581	519	1,948	1,703	1,652
Operating profit	912	651	644	718	534	595	930	879	3,137	2,725	2,764
Interest expense	115	114	112	107	108	99	147	129	488	443	462
Earnings before income tax expense	797	537	532	611	426	496	783	750	2,649	2,282	2,302
Income tax expense	274	172	182	184	125	176	274	266	902	751	794
Net earnings including noncontrolling interests	523	365	350	427	301	320	509	484	1,747	1,531	1,508
Net earnings attributable to noncontrolling interests	5	3	3	5	2	3	8	3	19	12	11
Net earnings attributable to The Kroger Co.	518	362	347	422	299	317	501	481	1,728	1,519	1,497
Net earnings attributable to The Kroger Co. per basic common share	$ 1.06	$ 0.74	$ 0.71	$ 0.82	$ 0.58	$ 0.61	$ 0.99	$ 0.93	$ 3.49	$ 2.93	$ 2.78
Average number of common shares used in basic calculation	486	486	485	511	515	515	501	514	490	514	533
Net earnings attributable to The Kroger Co. per diluted common share	$ 1.04	$ 0.73	$ 0.70	$ 0.81	$ 0.57	$ 0.60	$ 0.98	$ 0.92	$ 3.44	$ 2.90	$ 2.77
Average number of shares used in diluted calculation	493	492	491	517	521	521	507	520	497	520	537
Dividends declared per common share	$ 0.185	$ 0.185	$ 0.165	$ 0.165	$ 0.165	$ 0.150	$ 0.165	$ 0.150	$ 0.700	$ 0.63	$ 0.53
OG&A expenses due to contributions to the company's charitable foundation	60	25
Income tax benefit due to certain tax items		17		21	19
Harris Teeter
Operating, general and administrative				12	2	2
Interest expense				6	2	3
UFCW Consolidated Pension Plan
Operating, general and administrative	55
Pension Benefits
Operating, general and administrative							$ 87