Condensed Consolidated Segment Financial Information (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 10, 2016	Sep. 12, 2015	Sep. 10, 2016	Sep. 12, 2015
Net sales
Net sales	$ 3,865	$ 4,062	$ 9,061	$ 9,469
Net sales, %	100.00%	100.00%	100.00%	100.00%
Operating earnings
Operating earnings	$ 88	$ 94	$ 221	$ 252
Total operating earnings % of total net sales	2.30%	2.30%	2.40%	2.70%
Interest expense, net	$ 41	$ 44	$ 101	$ 103
Equity in earnings of unconsolidated affiliates	(1)	0	(2)	(2)
Earnings from continuing operations before income taxes	48	50	122	151
Income tax provision	18	19	45	57
Net earnings from continuing operations	30	31	77	94
Income from discontinued operations, net of tax	2	2	2	3
Net earnings including noncontrolling interests	32	33	79	97
Less net earnings attributable to noncontrolling interests	(1)	(2)	(2)	(5)
Net earnings attributable to SUPERVALU INC.	31	31	77	92
Wholesale [Member]
Net sales
Net sales	$ 1,731	$ 1,831	$ 4,006	$ 4,293
Net sales, %	44.80%	45.10%	44.20%	45.40%
Operating earnings
Operating earnings	$ 58	$ 49	$ 122	$ 126
% of sales	3.30%	2.70%	3.00%	2.90%
Save-A-Lot [Member]
Net sales
Net sales	$ 1,060	$ 1,091	$ 2,492	$ 2,499
Net sales, %	27.40%	26.80%	27.50%	26.40%
Operating earnings
Operating earnings	$ 22	$ 32	$ 61	$ 83
% of sales	2.10%	3.00%	2.40%	3.30%
Retail [Member]
Net sales
Net sales	$ 1,033	$ 1,092	$ 2,464	$ 2,565
Net sales, %	26.70%	26.90%	27.20%	27.10%
Operating earnings
Operating earnings	$ (12)	$ 10	$ (4)	$ 43
% of sales	(1.20%)	0.90%	(0.20%)	1.70%
Corporate Segment [Member]
Net sales
Net sales	$ 41	$ 48	$ 99	$ 112
Net sales, %	1.10%	1.20%	1.10%	1.10%
Operating earnings
Operating earnings	$ 20	$ 3	$ 42	$ 0