Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 10, 2016	Sep. 12, 2015	Sep. 10, 2016	Sep. 12, 2015
Income Statement [Abstract]
Net sales	$ 3,865	$ 4,062	$ 9,061	$ 9,469
Cost of sales	3,303	3,479	7,720	8,076
Gross profit	562	583	1,341	1,393
Selling and administrative expenses	474	489	1,120	1,141
Operating earnings	88	94	221	252
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
Basic net earnings per share attributable to SUPERVALU INC.:
Continuing operations (in dollars per share)	$ 0.11	$ 0.11	$ 0.28	$ 0.34
Discontinued operations (in dollars per share)	0.01	0.01	0.01	0.01
Basic net earnings per share (in dollars per share)	0.12	0.12	0.29	0.35
Diluted net earnings per share attributable to SUPERVALU INC.:
Continuing operations (in dollars per share)	0.11	0.11	0.28	0.33
Discontinued operations (in dollars per share)	0.01	0.01	0.01	0.01
Diluted net earnings per share (in dollars per share)	$ 0.12	$ 0.11	$ 0.29	$ 0.34
Weighted average number of shares outstanding:
Basic (in shares)	265	263	264	262
Diluted (in shares)	267	268	267	268