Net Earnings (Loss) Per Share - Calculation of Basic and Diluted Net Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 03, 2016	Dec. 05, 2015	Dec. 03, 2016	Dec. 05, 2015
Earnings Per Share [Abstract]
Net earnings from continuing operations	$ (11)	$ 16	$ 21	$ 54
Less net earnings attributable to noncontrolling interests	(1)	(1)	(3)	(6)
Net earnings from continuing operations	(12)	15	18	48
(Loss) income from discontinued operations, net of tax	(14)	19	33	78
Net (loss) earnings attributable to SUPERVALU INC.	$ (26)	$ 34	$ 51	$ 126
Weighted average number of shares outstanding-basic	265	264	265	263
Dilutive impact of stock-based awards	0	4	2	5
Weighted average number of shares outstanding-diluted	265	268	267	268
Basic net (loss) earnings per share attributable to SUPERVALU INC.:
Continuing operations (in dollars per share)	$ (0.04)	$ 0.05	$ 0.07	$ 0.18
Discontinued operations (in dollars per share)	(0.06)	0.07	0.12	0.30
Basic net earnings per share (in dollars per share)	(0.10)	0.13	0.19	0.48
Diluted net (loss) earnings per share attributable to SUPERVALU INC.:
Continuing operations (in dollars per share)	(0.04)	0.05	0.07	0.18
Discontinued operations (in dollars per share)	(0.06)	0.07	0.12	0.29
Diluted net earnings per share (in dollars per share)	$ (0.10)	$ 0.13	$ 0.19	$ 0.47