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Pension and Other Post-retirement Benefits - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 25, 2020
Oct. 27, 2019
Oct. 28, 2018
Pension and Other Post-retirement Benefits      
Total costs, defined contribution benefit plans $ 44.5 $ 43.0 $ 44.2
Pension Benefits      
Pension and Other Post-retirement Benefits      
Pension plans accumulated benefit obligation 1,600.0 $ 1,600.0  
Expected contribution representing benefit payments for unfunded plans during next fiscal year 29.4    
Pension Benefits | Private Equity      
Pension and Other Post-retirement Benefits      
Commitments for investments $ 125.0    
Post-retirement Benefits      
Pension and Other Post-retirement Benefits      
Increase in per capita cost of covered health care benefits assumed for next fiscal year (as a percent) 8.00%    
Expected ultimate pre-Medicare and post-Medicare rate (as a percent) 5.00%    
Year that reaches the ultimate trend rate 2026    
Minimum | Pension Benefits      
Pension and Other Post-retirement Benefits      
Amortization period of actuarial gains and losses and any adjustments resulting from plan amendments 8 years    
Minimum | Post-retirement Benefits      
Pension and Other Post-retirement Benefits      
Amortization period of actuarial gains and losses and any adjustments resulting from plan amendments 4 years    
Maximum | Pension Benefits      
Pension and Other Post-retirement Benefits      
Amortization period of actuarial gains and losses and any adjustments resulting from plan amendments 20 years    
Maximum | Post-retirement Benefits      
Pension and Other Post-retirement Benefits      
Amortization period of actuarial gains and losses and any adjustments resulting from plan amendments 16 years