Pension and Other Post-retirement Benefits - Plan Assets Allocations (Details) - Pension Benefits	Oct. 27, 2019	Oct. 28, 2018
Fixed Income
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	44.90%	33.60%
Global Stocks
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	38.00%
Private equity
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	5.70%	5.80%
Real estate
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	5.40%	5.70%
Hedge Funds
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	4.80%
Cash and cash equivalents
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage	1.20%	1.20%
Large capitalization equity
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage		13.70%
Small capitalization equity
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage		12.70%
International equity
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage		14.90%
Global equity
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage		12.40%
Total Equity Securities
Pension and Other Post-retirement Benefits
Actual weighted-average asset allocations, percentage		59.50%
Minimum | Fixed Income
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	35.00%	25.00%
Minimum | Global Stocks
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	20.00%
Minimum | Private equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	0.00%	0.00%
Minimum | Real estate
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	0.00%	0.00%
Minimum | Hedge Funds
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	0.00%
Minimum | Large capitalization equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		12.00%
Minimum | Small capitalization equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		3.00%
Minimum | International equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		10.00%
Minimum | Global equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		5.00%
Minimum | Total Equity Securities
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		50.00%
Maximum | Fixed Income
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	60.00%	45.00%
Maximum | Global Stocks
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	55.00%
Maximum | Private equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	10.00%	15.00%
Maximum | Real estate
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	10.00%	10.00%
Maximum | Hedge Funds
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage	10.00%
Maximum | Large capitalization equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		22.00%
Maximum | Small capitalization equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		13.00%
Maximum | International equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		20.00%
Maximum | Global equity
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		20.00%
Maximum | Total Equity Securities
Pension and Other Post-retirement Benefits
Target range of weighted-average asset allocations, percentage		75.00%