Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 06, 2014	Sep. 07, 2013	Sep. 06, 2014	Sep. 07, 2013
Income Statement [Abstract]
Net sales	$ 4,018	$ 3,947	$ 9,252	$ 9,188
Cost of sales	3,446	3,371	7,928	7,817
Gross profit	572	576	1,324	1,371
Selling and administrative expenses	478	464	1,095	1,175
Operating earnings	94	112	229	196
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)
(Loss) income 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
Basic net earnings (loss) per share attributable to SUPERVALU INC.:
Continuing operations	$ 0.11	$ 0.15	$ 0.29	$ (0.26)
Discontinued operations	$ 0.01		$ (0.01)	$ 0.76
Basic net earnings per share	$ 0.12	$ 0.15	$ 0.28	$ 0.50
Diluted net earnings (loss) per share attributable to SUPERVALU INC.:
Continuing operations	$ 0.11	$ 0.15	$ 0.29	$ (0.26)
Discontinued operations	$ 0.01		$ (0.01)	$ 0.75
Diluted net earnings per share	$ 0.11	$ 0.15	$ 0.28	$ 0.49
Weighted average number of shares outstanding:
Basic	260	258	260	251
Diluted	264	261	263	255
Net sales, %	100.00%	100.00%	100.00%	100.00%
Cost of sales, % of net sales	85.80%	85.40%	85.70%	85.10%
Gross profit, % of net sales	14.20%	14.60%	14.30%	14.90%
Selling and administrative expenses, % of net sales	11.90%	11.80%	11.80%	12.80%
Operating earnings, % of net sales	2.30%	2.80%	2.50%	2.10%
Interest expense, net, % of net sales	1.10%	1.30%	1.20%	3.30%
Equity in earnings of unconsolidated affiliates, % of net sales
Earnings (loss) from continuing operations before income taxes, % of net sales	1.20%	1.60%	1.30%	(1.10%)
Income tax provision (benefit), % of net sales	0.40%	0.50%	0.50%	(0.40%)
Net earnings (loss) from continuing operations, % of net sales	0.80%	1.00%	0.90%	(0.70%)
(Loss) income from discontinued operations, net of tax, % of net sales				2.10%
Net earnings including noncontrolling interests, % of net sales	0.80%	1.00%	0.80%	1.40%
Net earnings attributable to noncontrolling interests, % of net sales
Net earnings attributable to SUPERVALU INC., % of net sales	0.80%	1.00%	0.80%	1.40%