Derivative Instruments and Hedging Activities, Pre-Tax Effects of Derivative Instruments on AOCL and Income (Details) - Interest Rate Swaps [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jul. 30, 2021 |
Jul. 31, 2020 |
|
| Interest Rate Cash Flow Hedges [Abstract] | ||
| Amount of income (loss) recognized in AOCL on derivatives (effective portion) | $ 27,110 | $ (17,740) |
| Interest Expense [Member] | ||
| Interest Rate Cash Flow Hedges [Abstract] | ||
| Amount of loss reclassified from AOCL into income (effective portion) | $ 25,420 | $ 1,165 |