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PENSION PLANS - Assumptions Used (Details)
12 Months Ended
Jul. 25, 2020
Jul. 27, 2019
Compensation Related Costs [Abstract]    
Assumed discount rate — net periodic pension cost 3.41% 3.99%
Assumed discount rate — benefit obligation 2.26% 3.41%
Assumed rate of increase in compensation levels 4.50% 4.50%
Expected rate of return on plan assets 4.82% 5.50%