Employee Benefits (Schedule of Weighted-Average Asset Allocations by Asset Category) (Details)	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation	100.00%	100.00%	100.00%
Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation	0.90%	4.90%	2.20%
Corporate common stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation	12.20%	8.90%	9.00%
Equity mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation	49.90%	47.20%	52.00%
Real estate funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation	2.90%	4.30%	3.30%
Bond mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation	34.10%	34.70%	33.50%