BENEFIT PLANS - Net Periodic Benefit (Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 01, 2020	Aug. 03, 2019
Net Periodic Benefit (Income) Cost
Net periodic benefit (income) cost	$ 2,296
Pension Plan
Net Periodic Benefit (Income) Cost
Service cost	0	$ 0
Interest cost	57,495	75,706
Expected return on plan assets	(105,596)	(111,695)
Amortization of net actuarial gain	0	0
Pension settlement charge	11,303	0
Net periodic benefit (income) cost	(36,798)	(35,989)
Other Changes in Plan Assets and Benefits Obligations Recognized in Other Comprehensive (Loss) Income
Prior service benefit	0	0
Amortization of prior service benefit	0	0
Net actuarial loss (gain)	108,990	57,902
Amortization of net actuarial loss	0	0
Total expense (benefit) recognized in Other comprehensive (loss) income	108,990	57,902
Total expense (benefit) recognized in net periodic benefit cost (income) and Other comprehensive (loss) income	72,192	21,913
Other Postretirement Benefits
Net Periodic Benefit (Income) Cost
Service cost	54	173
Interest cost	943	1,447
Expected return on plan assets	(215)	(184)
Amortization of net actuarial gain	(3,107)	0
Pension settlement charge	0	0
Net periodic benefit (income) cost	(2,325)	1,436
Other Changes in Plan Assets and Benefits Obligations Recognized in Other Comprehensive (Loss) Income
Prior service benefit	0	(4,199)
Amortization of prior service benefit	1,400	0
Net actuarial loss (gain)	89	(9,912)
Amortization of net actuarial loss	1,707	0
Total expense (benefit) recognized in Other comprehensive (loss) income	3,196	(14,111)
Total expense (benefit) recognized in net periodic benefit cost (income) and Other comprehensive (loss) income	$ 871	$ (12,675)