ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - ITEMS RECLASSIFIED OUT OF AOCI (Details) - USD ($) $ in Millions	4 Months Ended
	May 21, 2016	May 23, 2015
Reclassification out of AOCI and the related tax effects
Tax expense	$ (366)	$ (330)
Net earnings attributable to The Kroger Co.	680	619
Reclassification out of AOCI
Reclassification out of AOCI and the related tax effects
Net earnings attributable to The Kroger Co.	10	16
Reclassification out of AOCI | Cash Flow Hedging Activities
Reclassification out of AOCI and the related tax effects
Amortization of gains and losses on cash flow hedging activities	1
Net earnings attributable to The Kroger Co.	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	14	25
Tax expense	(5)	(9)
Net earnings attributable to The Kroger Co.	$ 9	$ 16