ACQUISITIONS ACQUISITIONS - Schedule of Pro Forma Information (Details) - Supervalu - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 27, 2018	[1]	Jan. 26, 2019	[2]	Jan. 27, 2018	[1]
Business Acquisition [Line Items]
Net sales	$ 6,159,106		$ 12,134,176		$ 12,056,161
Net loss from continuing operations	$ (25,388)		$ (411,196)		$ (34,349)
Basic net loss continuing operations per share	$ (0.50)		$ (8.11)		$ (0.68)
Diluted net loss from continuing operations per share	$ (0.50)		$ (8.11)		$ (0.68)

[1] Includes 13 and 26 weeks of pro forma Supervalu results for the period ended December 2, 2017 and 6 and 19 weeks of pro forma Associated Grocers of Florida, Inc. results for the period ended November 4, 2017, which was acquired by Supervalu on December 8, 2017.

[2] Includes 12 weeks of pro forma Supervalu results for the period ended September 8, 2018.