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	12 Months Ended
Feb. 28, 2015	Feb. 22, 2014	Feb. 23, 2013
Earnings Per Share [Abstract]
Net earnings (loss) from continuing operations	$ 127	$ 13	$ (253)
Less net earnings attributable to noncontrolling interests	(7)	(7)	(10)
Net earnings (loss) from continuing operations attributable to SUPERVALU INC.	120	6	(263)
Income (loss) from discontinued operations, net of tax	72	176	(1,203)
Net earnings (loss) attributable to SUPERVALU INC.	$ 192	$ 182	$ (1,466)
Weighted average number of shares outstanding—basic (shares)	260	255	212
Dilutive impact of stock-based awards (shares)	4	3	0
Weighted average number of shares outstanding—diluted (shares)	264	258	212
Basic net earnings (loss) per share attributable to SUPERVALU INC.:
Continuing operations (usd per share)	$ 0.46	$ 0.02	$ (1.24)
Discontinued operations (usd per share)	$ 0.28	$ 0.69	$ (5.67)
Basic net earnings (loss) per share (usd per share)	$ 0.74us-gaap_EarningsPerShareBasic	$ 0.71us-gaap_EarningsPerShareBasic	$ (6.91)us-gaap_EarningsPerShareBasic
Diluted net earnings (loss) per share attributable to SUPERVALU INC.:
Continuing operations (usd per share)	$ 0.45	$ 0.02	$ (1.24)
Discontinued operations (usd per share)	$ 0.27	$ 0.68	$ (5.67)
Diluted net earnings (loss) per share (usd per share)	$ 0.73us-gaap_EarningsPerShareDiluted	$ 0.70us-gaap_EarningsPerShareDiluted	$ (6.91)us-gaap_EarningsPerShareDiluted

Incremental common shares attributable to options and restricted stock.

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After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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