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BENEFIT PLANS - Net Periodic Benefit Cost (Income) Recognized in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jan. 30, 2021
Feb. 01, 2020
Jan. 30, 2021
Feb. 01, 2020
Pension Benefits        
Net Periodic Benefit (Income) Cost        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 9,164 13,602 18,328 30,292
Expected return on plan assets (25,964) (26,587) (51,929) (54,069)
Amortization of prior service credit 0 0 0 0
Amortization of net actuarial loss (gain) 261 3 617 6
Pension settlement charge 0 10,303 0 10,303
Net periodic benefit income (16,539) (2,679) (32,984) (13,468)
Contributions to benefit plans (375) (1,150) (750) (5,250)
Other Postretirement Benefits        
Net Periodic Benefit (Income) Cost        
Service cost 12 14 24 28
Interest cost 103 236 206 472
Expected return on plan assets (26) (54) (52) (108)
Amortization of prior service credit (350) (350) (700) (700)
Amortization of net actuarial loss (gain) (315) (430) (630) (857)
Pension settlement charge 0 0 0 0
Net periodic benefit income (576) (584) (1,152) (1,165)
Contributions to benefit plans $ (950) $ (60) $ (1,900) $ (160)