ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - ITEMS RECLASSIFIED OUT OF AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 16, 2025	Aug. 17, 2024	Aug. 16, 2025	Aug. 17, 2024
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Tax expense	$ 162	$ 148	$ 397	$ 382
Net earnings attributable to The Kroger Co.	609	466	1,475	1,413
Total reclassifications, net of tax	5	2	6	2
Cash flow hedging activity
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Tax expense			(1)	(1)
Total reclassifications, net of tax			5	4
Pension and postretirement defined benefit plan
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Amortization of amounts included in net periodic pension cost	2	(1)	1	(3)
Tax expense		1		1
Total reclassifications, net of tax	2		1	(2)
Reclassification out of AOCI | Cash flow hedging activity
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Amortization of gains and losses on cash flow hedging activities	3	2	6	5
Tax expense			(1)	(1)
Net earnings attributable to The Kroger Co.	$ (3)	$ (2)	$ (5)	$ (4)