BENEFIT PLANS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	0 Months Ended
	Feb. 21, 2014	Nov. 29, 2014	Feb. 28, 2015 plan Agreement Employees	Feb. 22, 2014	Feb. 23, 2013	Nov. 29, 2014	Sep. 11, 2014
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Reduction in postretirement benefit obligation	$ 11
Contribution to pension plans			79
Contribution to other postretirement benefits plan			10
Defined benefit plan periodic cost increased in next fiscal year			182
Defined benefit plan assets unrecognized gain loss recognized period			3 years
Assumed healthcare cost trend rate			7.25%
Specified age of employee for post retirement benefit plans				65 years
Company's service and interest cost would impact due to a 100 basis point change in the trend rate			1
Company's accumulated postretirement benefit obligation would impact due to a 100 basis point decrease in the trend rate			7
Company's accumulated postretirement benefit obligation would impact due to a 100 basis point increase in the trend rate			8
Employer discretionary contribution amount		100
Discount rate			3.80%	4.65%	4.25%
Expected return on plan assets				7.00%	7.25%
Total contribution expenses of defined contribution plans			16	11	17
Contribution to pension plans			39	39	38
Number of plans included in other multiemployer pension plans			12
Company's number of employees (employees)			38,500
Number of collective bargaining agreements covering employees renegotiated (agreements)			19
Number of employees renegotiated collective bargaining agreement (employees)			11,700
Number of employees expired without renegotiated collective bargaining agreement (employees)			800
Number of collective bargaining agreements covering employees expired without renegotiated (agreements)			4
Number of collective bargaining agreements covering employees expired (agreements)			8
Minimum
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Discount rate			0.30%	0.30%	0.40%
Expected return on plan assets			7.00%
Minimum | Green Zone
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Maximum percentage of funded status			80.00%
Maximum
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Discount rate			5.10%	5.10%	5.10%
Expected return on plan assets			6.50%
Maximum | Red Zone
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Maximum percentage of funded status			65.00%
Maximum | Yellow Zone
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Maximum percentage of funded status			80.00%
Number of Employees Covered by Collective Bargaining Agreements
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Number of employees covered by collective bargaining agreements (employees)			16,000
Number of collective bargaining agreements covering employees renegotiated (agreements)			49
Collective Bargaining Agreements Covering Employees Expire Within One Year
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Number of employee expire collective bargaining agreement (employees)			1,200
Pension Benefits
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Reduction in postretirement benefit obligation			0	0
Defined benefit plan periodic cost increased			32
Benefits paid			97	147
Contribution to pension plans			165	118
Pension Benefits | Minimum
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Contribution to pension plans			55
Pension Benefits | Maximum
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Contribution to pension plans			65
Lump Sum Pension Settlement
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Benefits paid						272
Settlement of asset retirement obligations through noncash payments						64
Discount rate		4.10%				4.10%
Expected return on plan assets						6.50%
Finalization of pension and other postretirement benefit plan valuation, before tax						(200)
Pension and other postretirement benefit plans, adjustment, before reclassification adjustments						141
Other Postretirement Benefits
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Reduction in postretirement benefit obligation			5	11
Defined benefit plan periodic cost increased			6
Benefits paid			4	6
Contribution to pension plans			4	6
Multiemployer Postretirement Benefit Plans Other than Pensions
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Contribution to multi-employer plans			89	87	90
Retirees Before Age 65
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Assumed healthcare cost trend rate			0.25%
Assumed healthcare cost ultimate trend rate			4.50%
Retirees After Age 65
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Assumed healthcare cost trend rate			6.00%
Assumed healthcare cost ultimate trend rate			4.50%
SUPERVALU Retirement Plan
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer discretionary contribution amount			$ 100				$ 47