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	4 Months Ended
	Jun. 14, 2014	Jun. 15, 2013
Earnings Per Share [Abstract]
Net earnings (loss) from continuing operations	$ 48	$ (102)
Less Net earnings attributable to noncontrolling interests	2	3
Net earnings (loss) from continuing operations attributable to SUPERVALU INC.	46	(105)
(Loss) income from discontinued operations, net of tax	(3)	190
Net earnings attributable to SUPERVALU INC.	$ 43	$ 85
Weighted average number of shares outstanding-basic	260	246
Dilutive impact of stock-based awards	2	4
Weighted average number of shares outstanding-diluted	262	250
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