Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares shares in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Statement of Stockholders' Equity [Abstract]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member	us-gaap:AccountingStandardsUpdate201409Member	us-gaap:AccountingStandardsUpdate201802Member
Purchase of treasury shares (in shares)	384,498	998,004	180,735
Dividends declared (in dollars per share)	$ 1.53	$ 1.43	$ 1.25