Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 02, 2017	Dec. 03, 2016	Dec. 02, 2017	Dec. 03, 2016
Income Statement [Abstract]
Net sales	$ 3,938	$ 3,003	$ 11,742	$ 9,573
Cost of sales	3,529	2,596	10,354	8,221
Gross profit	409	407	1,388	1,352
Selling and administrative expenses	370	391	1,289	1,189
Goodwill impairment charge	0	15	0	15
Operating earnings	39	1	99	148
Interest expense, net	29	40	103	141
Equity in earnings of unconsolidated affiliates	0	(1)	(2)	(3)
Earnings (loss) from continuing operations before income taxes	10	(38)	(2)	10
Income tax benefit	(8)	(27)	(7)	(11)
Net earnings (loss) from continuing operations	18	(11)	5	21
Income (loss) from discontinued operations, net of tax	8	(14)	8	33
Net earnings (loss) including noncontrolling interests	26	(25)	13	54
Less net earnings attributable to noncontrolling interests	0	1	1	3
Net earnings (loss) attributable to SUPERVALU INC.	$ 26	$ (26)	$ 12	$ 51
Basic net earnings (loss) per share attributable to SUPERVALU INC.:(1)
Continuing operations (in dollars per share)	$ 0.47	$ (0.31)	$ 0.12	$ 0.49
Discontinued operations (in dollars per share)	0.21	(0.39)	0.20	0.85
Basic net earnings per share (in dollars per share)	0.67	(0.69)	0.32	1.34
Diluted net earnings (loss) per share attributable to SUPERVALU INC.:(1)
Continuing operations (in dollars per share)	0.46	(0.31)	0.12	0.48
Discontinued operations (in dollars per share)	0.21	(0.39)	0.20	0.84
Diluted net earnings per share (in dollars per share)	$ 0.67	$ (0.69)	$ 0.31	$ 1.33
Weighted average number of shares outstanding:
Basic (in shares)	38	38	38	38
Diluted (in shares)	38	38	38	38