Condensed Consolidated Segment Financial Information (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 12, 2015	Sep. 06, 2014	Sep. 12, 2015	Sep. 06, 2014
Net sales
Net sales	$ 4,062	$ 4,041	$ 9,469	$ 9,305
Net sales, %	100.00%	100.00%	100.00%	100.00%
Operating earnings
Operating earnings	$ 94	$ 94	$ 252	$ 229
Total operating earnings % of total net sales	2.30%	2.30%	2.70%	2.50%
Interest expense, net	$ 44	$ 46	$ 103	$ 110
Equity in earnings of unconsolidated affiliates	0	(1)	(2)	(2)
Earnings from continuing operations before income taxes	50	49	151	121
Income tax provision	19	18	57	42
Net earnings from continuing operations	31	31	94	79
Income (loss) from discontinued operations, net of tax	2	2	3	(1)
Net earnings including noncontrolling interests	33	33	97	78
Less net earnings attributable to noncontrolling interests	(2)	(2)	(5)	(4)
Net earnings attributable to SUPERVALU INC.	31	31	92	74
Independent Business [Member]
Net sales
Net sales	$ 1,831	$ 1,835	$ 4,293	$ 4,255
Net sales, %	45.10%	45.40%	45.40%	45.80%
Operating earnings
Operating earnings	$ 49	$ 54	$ 126	$ 120
% of sales	2.70%	2.90%	2.90%	2.80%
Save-A-Lot [Member]
Net sales
Net sales	$ 1,091	$ 1,057	$ 2,499	$ 2,413
Net sales, %	26.80%	26.20%	26.40%	25.90%
Operating earnings
Operating earnings	$ 32	$ 26	$ 83	$ 72
% of sales	3.00%	2.50%	3.30%	3.00%
Retail Food [Member]
Net sales
Net sales	$ 1,092	$ 1,105	$ 2,565	$ 2,535
Net sales, %	26.90%	27.30%	27.10%	27.20%
Operating earnings
Operating earnings	$ 10	$ 20	$ 43	$ 50
% of sales	0.90%	1.80%	1.70%	2.00%
Corporate [Member]
Net sales
Net sales	$ 48	$ 44	$ 112	$ 102
Net sales, %	1.20%	1.10%	1.10%	1.10%
Operating earnings
Operating earnings	$ 3	$ (6)	$ 0	$ (13)