CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	4 Months Ended
	Jun. 14, 2014	Jun. 15, 2013
Income Statement [Abstract]
Net sales	$ 5,234	$ 5,241
Cost of sales	4,482	4,446
Gross profit	752	795
Selling and administrative expenses	617	711
Operating earnings	135	84
Interest expense, net	64	249
Equity in earnings of unconsolidated affiliates	(1)	(1)
Earnings (loss) from continuing operations before income taxes	72	(164)
Income tax provision (benefit)	24	(62)
Net earnings (loss) from continuing operations	48	(102)
(Loss) income from discontinued operations, net of tax	(3)	190
Net earnings including noncontrolling interests	45	88
Net earnings attributable to noncontrolling interests	2	3
Net earnings attributable to SUPERVALU INC.	$ 43	$ 85
Basic net earnings (loss) per share attributable to SUPERVALU INC.:
Continuing operations	$ 0.18	$ (0.43)
Discontinued operations	$ (0.01)	$ 0.78
Basic net earnings per share	$ 0.17	$ 0.35
Diluted net earnings (loss) per share attributable to SUPERVALU INC.:
Continuing operations	$ 0.18	$ (0.43)
Discontinued operations	$ (0.01)	$ 0.77
Diluted net earnings per share	$ 0.17	$ 0.34
Weighted average number of shares outstanding:
Basic	260	246
Diluted	262	250
Net sales, %	100.00%	100.00%
Cost of sales, % of net sales	85.60%	84.80%
Gross profit, % of net sales	14.40%	15.20%
Selling and administrative expenses, % of net sales	11.80%	13.60%
Operating earnings, % of net sales	2.60%	1.60%
Interest expense, net, % of net sales	1.20%	4.80%
Equity in earnings of unconsolidated affiliates, % of net sales	0.00%	0.00%
Earnings (loss) from continuing operations before income taxes, % of net sales	1.40%	(3.10%)
Income tax provision (benefit), % of net sales	0.50%	(1.20%)
Net earnings (loss) from continuing operations, % of net sales	0.90%	(2.00%)
(Loss) income from discontinued operations, net of tax, % of net sales	(0.10%)	3.60%
Net earnings including noncontrolling interests, % of net sales	0.90%	1.70%
Net earnings attributable to noncontrolling interests, % of net sales	0.00%	0.10%
Net earnings attributable to SUPERVALU INC., % of net sales	0.80%	1.60%