Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 12, 2015	Sep. 06, 2014	Sep. 12, 2015	Sep. 06, 2014
Income Statement [Abstract]
Net sales	$ 4,062	$ 4,041	$ 9,469	$ 9,305
Cost of sales	3,479	3,467	8,076	7,976
Gross profit	583	574	1,393	1,329
Selling and administrative expenses	489	480	1,141	1,100
Operating earnings	94	94	252	229
Interest expense, net	44	46	103	110
Equity in earnings of unconsolidated affiliates	0	(1)	(2)	(2)
Earnings from continuing operations before income taxes	50	49	151	121
Income tax provision	19	18	57	42
Net earnings from continuing operations	31	31	94	79
Income (loss) from discontinued operations, net of tax	2	2	3	(1)
Net earnings including noncontrolling interests	33	33	97	78
Less net earnings attributable to noncontrolling interests	(2)	(2)	(5)	(4)
Net earnings attributable to SUPERVALU INC.	$ 31	$ 31	$ 92	$ 74
Basic net earnings (loss) per share attributable to SUPERVALU INC.:
Continuing operations (in dollars per share)	$ 0.11	$ 0.11	$ 0.34	$ 0.29
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	0.35	0.28
Diluted net earnings (loss) per share attributable to SUPERVALU INC.:
Continuing operations (in dollars per share)	0.11	0.11	0.33	0.29
Discontinued operations (in dollars per share)	0.01	0.01	0.01	(0.01)
Diluted net earnings per share (in dollars per share)	$ 0.11	$ 0.11	$ 0.34	$ 0.28
Weighted average number of shares outstanding:
Basic (in shares)	263	260	262	260
Diluted (in shares)	268	264	268	263