Net Earnings (Loss) Per Share - Calculation of Basic and Diluted Net Earnings (Loss) Per Share (Detail) (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
Earnings Per Share [Abstract]
Net earnings (loss) from continuing operations	$ 31	$ 40	$ 79	$ (62)
Less Net earnings attributable to noncontrolling interests	2	1	4	4
Net earnings (loss) from continuing operations attributable to SUPERVALU INC.	29	39	75	(66)
Income (loss) from discontinued operations, net of tax	2	1	(1)	191
Net earnings attributable to SUPERVALU INC.	$ 31	$ 40	$ 74	$ 125
Weighted average number of shares outstanding-basic	260	258	260	251
Dilutive impact of stock-based awards	4	3	3	4
Weighted average number of shares outstanding-diluted	264	261	263	255
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