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	12 Months Ended
	Feb. 25, 2017	Feb. 27, 2016	Feb. 28, 2015
Earnings Per Share [Abstract]
Net earnings from continuing operations	$ 27	$ 84	$ 25
Less net earnings attributable to noncontrolling interests	(4)	(8)	(7)
Net earnings from continuing operations attributable to SUPERVALU INC.	23	76	18
Income from discontinued operations, net of tax	627	102	174
Net earnings attributable to SUPERVALU INC.	$ 650	$ 178	$ 192
Weighted average number of shares outstanding—basic (shares)	265	263	260
Dilutive impact of stock-based awards (shares)	3	5	4
Weighted average number of shares outstanding—diluted (shares)	268	268	264
Basic net earnings per share attributable to SUPERVALU INC.:
Continuing operations (usd per share)	$ 0.09	$ 0.29	$ 0.07
Discontinued operations (usd per share)	2.37	0.39	0.67
Basic net earnings per share (usd per share)	2.45	0.68	0.74
Diluted net earnings per share attributable to SUPERVALU INC.:
Continuing operations (usd per share)	0.09	0.28	0.07
Discontinued operations (usd per share)	2.34	0.38	0.66
Diluted net earnings per share (usd per share)	$ 2.43	$ 0.66	$ 0.73