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Pension And Postretirement Benefits (Weighted-Average Assumptions To Determine Net Periodic Benefit Costs) (Details) - Pension Plan, Defined Benefit [Member]
12 Months Ended
Jul. 31, 2022
Aug. 01, 2021
Aug. 02, 2020
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate 3.13% 2.47% 3.46%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets 5.82% 6.01% 6.85%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 3.23% 3.23% 3.20%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate 4.00% 4.00% 4.00%