ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) (USD $) In Millions, 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
Reclassification out of AOCI and the related tax effects
Amortization of unrealized gains and losses on cash flow hedging activities	$ (115)	$ (114)	$ (112)	$ (107)	$ (108)	$ (99)	$ (147)	$ (129)	$ (488)	$ (443)	$ (462)
Amortization of amounts included in net periodic pension expense									42	102	97
Tax expense	(274)	(172)	(182)	(184)	(125)	(176)	(274)	(266)	(902)	(751)	(794)
Net earnings attributable to The Kroger Co.	518	362	347	422	299	317	501	481	1,728	1,519	1,497
Reclassification out of AOCI
Reclassification out of AOCI and the related tax effects
Net earnings attributable to The Kroger Co.									23	63
Reclassification out of AOCI | Cash Flow Hedging Activities
Reclassification out of AOCI and the related tax effects
Amortization of unrealized gains and losses on cash flow hedging activities									1	2
Tax expense										(1)
Net earnings attributable to The Kroger Co.									1	1
Reclassification out of AOCI | Pension and Postretirement Defined Benefit Plans
Reclassification out of AOCI and the related tax effects
Amortization of amounts included in net periodic pension expense									35	98
Tax expense									(13)	(36)
Net earnings attributable to The Kroger Co.									$ 22	$ 62