RESTRUCTURING, ACQUISITION, AND INTEGRATION RELATED EXPENSES Restructuring Reserves (Details) $ in Thousands	9 Months Ended
	Apr. 27, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Balances at July 28, 2018	$ 2,219
Restructuring program charges	66,423	[1]
Restructuring Reserve Acquired	6,193
Payments for Restructuring	(60,224)
Balances at January 26, 2018	14,611
Restructuring and Related Cost, Cost Incurred to Date	68,642
Supervalu
Restructuring Cost and Reserve [Line Items]
Balances at July 28, 2018	0
Restructuring program charges	66,423	[1]
Restructuring Reserve Acquired	6,193
Payments for Restructuring	(58,005)
Balances at January 26, 2018	14,611
Restructuring and Related Cost, Cost Incurred to Date	66,423
Earth Origins Market
Restructuring Cost and Reserve [Line Items]
Balances at July 28, 2018	2,219
Restructuring program charges	0
Restructuring Reserve Acquired	0
Payments for Restructuring	(2,219)
Balances at January 26, 2018	0
Restructuring and Related Cost, Cost Incurred to Date	2,219
Employee Severance | Supervalu
Restructuring Cost and Reserve [Line Items]
Restructuring program charges	$ 40,000

[1] Includes $40.0 million of charges related to change-in-control expense to satisfy outstanding equity awards and severance related costs.