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Pension and Other Post-retirement Benefits - Changes In Fair Value (Details) - Pension Benefits - USD ($) $ in Thousands | 12 Months Ended
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Oct. 25, 2020 | Oct. 27, 2019
Change in Plan Assets |  |
Fair Value of Plan Assets at Beginning of Year | $ 1,477,288 | $ 1,313,380
Fair Value of Plan Assets at End of Year | 1,553,532 | 1,477,288
Significant Unobservable Inputs (Level 3) |  |
Change in Plan Assets |  |
Fair Value of Plan Assets at Beginning of Year | 84,901 | 76,257
Purchases, Issuances, and Settlements (Net) | (10,151) | (2,894)
Unrealized Gains (Losses) | (4,577) | 1,182
Realized Gains | 8,130 | 9,738
Interest and Dividend Income | 5,535 | 618
Fair Value of Plan Assets at End of Year | $ 83,838 | $ 84,901

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