Condensed Consolidated Segment Financial Information (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 06, 2014	Sep. 07, 2013	Sep. 06, 2014	Sep. 07, 2013
Net sales
Net sales	$ 4,018	$ 3,947	$ 9,252	$ 9,188
Net sales, %	100.00%	100.00%	100.00%	100.00%
Operating earnings
Operating earnings	94	112	229	196
Total operating earnings % of total net sales	2.30%	2.80%	2.50%	2.10%
% of sales	0.80%	1.00%	0.90%	(0.70%)
Interest expense, net	46	51	110	300
Equity in earnings of unconsolidated affiliates	(1)	(1)	(2)	(2)
Earnings (loss) from continuing operations before income taxes	49	62	121	(102)
Income tax provision (benefit)	18	22	42	(40)
Net earnings (loss) from continuing operations	31	40	79	(62)
Income (loss) from discontinued operations, net of tax	2	1	(1)	191
Net earnings including noncontrolling interests	33	41	78	129
Net earnings attributable to noncontrolling interests	2	1	4	4
Net earnings attributable to SUPERVALU INC.	31	40	74	125
Independent Business [Member]
Net sales
Net sales	1,820	1,840	4,220	4,303
Net sales, %	45.30%	46.60%	45.60%	46.80%
Operating earnings
Operating earnings	54	73	120	128
% of sales	2.90%	3.90%	2.80%	3.00%
Save-A-Lot [Member]
Net sales
Net sales	1,050	972	2,398	2,238
Net sales, %	26.10%	24.60%	25.90%	24.40%
Operating earnings
Operating earnings	26	32	72	84
% of sales	2.50%	3.30%	3.00%	3.70%
Retail Food [Member]
Net sales
Net sales	1,104	1,073	2,532	2,501
Net sales, %	27.50%	27.20%	27.40%	27.20%
Operating earnings
Operating earnings	20	7	50	14
% of sales	1.80%	0.80%	2.00%	0.60%
Corporate [Member]
Net sales
Net sales	44	62	102	146
Net sales, %	1.10%	1.60%	1.10%	1.60%
Operating earnings
Operating earnings	$ (6)		$ (13)	$ (30)