RESTRUCTURING, ACQUISITION AND INTEGRATION RELATED EXPENSES - Restructuring Programs (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 03, 2019	Jul. 28, 2018
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 1,084	$ 4,298
Restructuring program charge	74,414	2,219
Acquired restructuring liability	12,573
Cash payments	(75,130)	(5,433)
Ending balance	12,941	1,084
Cumulative program charges incurred from inception to date	83,497
SUPERVALU
Restructuring Cost and Reserve [Line Items]
Beginning balance	0	0
Restructuring program charge	74,414	0
Acquired restructuring liability	12,573
Cash payments	(75,130)	0
Ending balance	11,857	0
Cumulative program charges incurred from inception to date	74,414
Earth Origins Market
Restructuring Cost and Reserve [Line Items]
Beginning balance	383	0
Restructuring program charge	0	2,219
Acquired restructuring liability	0
Cash payments	0	(1,836)
Ending balance	383	383
Cumulative program charges incurred from inception to date	2,219
2017 Cost Saving and Efficiency Initiatives
Restructuring Cost and Reserve [Line Items]
Beginning balance	701	4,298
Restructuring program charge	0	0
Acquired restructuring liability	0
Cash payments	0	(3,597)
Ending balance	701	$ 701
Cumulative program charges incurred from inception to date	6,864
Employee Severance | SUPERVALU
Restructuring Cost and Reserve [Line Items]
Restructuring program charge	$ 43,000