Business Acquisitions Schedule of Pro-Forma Information (Details) - SUPERVALU Inc. - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
Sep. 09, 2017	Sep. 09, 2017
Business Combination Segment Allocation [Line Items]
Net sales	$ 3,663	$ 8,532
Net earnings from continuing operations attributable to SUPERVALU INC.	$ 0	$ 5
Basic net (loss) earnings from continuing operations per share attributable to SUPERVALU INC. (earnings per share)	$ (0.01)	$ 0.13
Diluted net (loss) earnings from continuing operations per share attributable to SUPERVALU INC. (earnings per share)	$ (0.01)	$ 0.13

Per basic share amount of pro forma income from continuing operations, after tax, as if the business combination had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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Per diluted share amount of pro forma income from continuing operations, after tax, as if the business combination had been completed at the beginning of a period.

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Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.

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