Condensed Consolidated Segment Financial Information (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 03, 2016	Dec. 05, 2015	Dec. 03, 2016	Dec. 05, 2015
Net sales
Net sales	$ 3,003	$ 3,045	$ 9,573	$ 10,016
Net sales, %	100.00%	100.00%	100.00%	100.00%
Operating earnings
Operating earnings	$ 1	$ 66	$ 148	$ 223
Total operating earnings % of total net sales	0.10%	2.20%	1.50%	2.20%
Interest expense, net	$ 40	$ 45	$ 141	$ 148
Equity in earnings of unconsolidated affiliates	(1)	(1)	(3)	(3)
(Loss) earnings from continuing operations before income taxes	(38)	22	10	78
Income tax (benefit) provision	(27)	6	(11)	24
Net (loss) earnings from continuing operations	(11)	16	21	54
Income from discontinued operations, net of tax	(14)	19	33	78
Net (loss) earnings including noncontrolling interests	(25)	35	54	132
Less net earnings attributable to noncontrolling interests	(1)	(1)	(3)	(6)
Net (loss) earnings attributable to SUPERVALU INC.	(26)	34	51	126
Wholesale [Member]
Net sales
Net sales	$ 1,906	$ 1,902	$ 5,912	$ 6,195
Net sales, %	63.50%	62.50%	61.80%	61.90%
Operating earnings
Operating earnings	$ 52	$ 54	$ 174	$ 180
% of sales	2.70%	2.80%	2.90%	2.90%
Retail [Member]
Net sales
Net sales	$ 1,060	$ 1,097	$ 3,524	$ 3,662
Net sales, %	35.30%	36.00%	36.80%	36.60%
Operating earnings
Operating earnings	$ (14)	$ 21	$ (18)	$ 64
% of sales	(1.30%)	2.00%	(0.50%)	1.80%
Corporate Segment [Member]
Net sales
Net sales	$ 37	$ 46	$ 137	$ 159
Net sales, %	1.20%	1.50%	1.40%	1.50%
Operating earnings
Operating earnings	$ (37)	$ (9)	$ (8)	$ (21)