BENEFIT PLANS - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 27, 2019 USD ($) employee agreement	Apr. 28, 2018 USD ($)	Apr. 27, 2019 USD ($) employee agreement	Apr. 28, 2018 USD ($)	Aug. 01, 2020 agreement employee	Aug. 03, 2019 agreement employee	Oct. 22, 2018
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Multiemployer Plans, Withdrawal Obligation	$ 35.7		$ 35.7
Impact to service and interest cost with a 100 basis point increase in the trend rate			0.0
Company's accumulated postretirement benefit obligation would impact due to a 100 basis point decrease in the trend rate			2.7
Company's accumulated postretirement benefit obligation would impact due to a 100 basis point increase in the trend rate			3.2
Employer contribution in defined contribution plans			$ 20.8	$ 8.6
Company's number of employees (employees) | employee	19,000		19,000
Number of employees covered by collective bargaining agreements (employees) | employee	5,000		5,000
Number of collective bargaining agreements for covered employees (agreements) | agreement	47		47
Number of initial collective bargaining agreements (agreements) | agreement	2		2
Number of employees covered by initial collective bargaining agreements (employees) | employee	24		24
Number of collective bargaining agreements covering employees renegotiated (agreements) | agreement			9
Number of employees renegotiated collective bargaining agreement (employees) | employee			800
Number of collective bargaining agreements covering employees expired without renegotiated (agreements) | agreement			400
Maximum
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Expected employer contributions in current fiscal year	$ 10.0		$ 10.0
Minimum
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Expected employer contributions in current fiscal year	5.0		5.0
Multiemployer Postretirement Benefit
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Contribution to multi-employer plans	$ 13.8	$ 0.1	27.4	$ 0.4
Post-Employment Benefits | Retirement Plan, Before Age 65 [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Assumed healthcare cost trend rate							7.80%
Assumed healthcare cost ultimate trend rate							4.50%
Post-Employment Benefits | Retirement Plan, After Age 65 [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Assumed healthcare cost trend rate							8.70%
Assumed healthcare cost ultimate trend rate							4.50%
Scenario, Forecast [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Number of collective bargaining agreements covering employees expired (agreements) | agreement					6	6
Number of employee expire collective bargaining agreement (employees) | employee					500	670
Health and Welfare Plan | Multiemployer Postretirement Benefit
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Contribution to multi-employer plans			$ 42.3