BENEFIT PLANS - Net Periodic Benefit Cost (Income) Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 01, 2021	May 02, 2020	May 01, 2021	May 02, 2020
Pension Benefits
Net Periodic Benefit (Income) Cost
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	9,164	13,602	27,492	43,894
Expected return on plan assets	(25,965)	(25,765)	(77,894)	(79,834)
Amortization of prior service credit	0	0	0	0
Amortization of net actuarial loss (gain)	261	3	878	9
Pension settlement charge			0	10,303
Net periodic benefit income	(16,540)	(12,160)	(49,524)	(25,628)
Contributions to benefit plans	(375)	(1,500)	(1,125)	(6,750)
Other Postretirement Benefits
Net Periodic Benefit (Income) Cost
Service cost	12	14	36	42
Interest cost	103	236	309	708
Expected return on plan assets	(26)	(54)	(78)	(162)
Amortization of prior service credit	(350)	(350)	(1,050)	(1,050)
Amortization of net actuarial loss (gain)	(315)	(430)	(945)	(1,287)
Pension settlement charge			0	0
Net periodic benefit income	(576)	(584)	(1,728)	(1,749)
Contributions to benefit plans	$ (950)	$ (175)	$ (2,850)	$ (335)