Earnings Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Earnings Per Share [Abstract]
Net income as reported	$ 127,866	$ 75,670	$ 224,365	$ 132,546
Basic weighted-average shares	124,295	128,205	125,177	133,175
Common stock equivalents	1,704	604	1,603	1,174
Diluted weighted-average shares	125,999	128,809	126,780	134,349
Debt Instrument [Line Items]
Shares issued under stock incentive and employee stock purchase plans	418	60	874	608
Restricted Stock Units RSU And Employee Stock Option Member [Member]
Debt Instrument [Line Items]
Weighted-average number of antidilutive options and restricted stock units	36	3,967	311	2,321