RESTRUCTURING, ACQUISITION, AND INTEGRATION RELATED EXPENSES Restructuring, Acquisition, and Integration Related Expenses (Details) $ in Thousands		3 Months Ended			9 Months Ended	12 Months Ended
		Apr. 27, 2019 USD ($)	Jul. 28, 2018 USD ($) store	Jan. 27, 2018 store	Apr. 27, 2019 USD ($)	Jul. 28, 2018 USD ($) store
Restructuring Cost and Reserve [Line Items]
Restructuring program charges	[1]				$ 66,423
Restructuring Charges		$ 19,438			134,567
Additional restructuring expense		2,000			2,000
Restructuring, Settlement and Impairment Provisions [Member]
Restructuring Cost and Reserve [Line Items]
Acquisition and integration costs		6,084			47,500
Supervalu
Restructuring Cost and Reserve [Line Items]
Restructuring program charges	[1]				66,423
Restructuring Charges		12,257
Earth Origins Market
Restructuring Cost and Reserve [Line Items]
Restructuring program charges					0
Restructuring Charges						$ 2,200
Number of Stores Closed | store				3
Number of Stores | store			12			12
Gain (Loss) on Disposition of Business			$ (2,700)
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 1,097			$ 20,644

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