Earnings Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Earnings Per Share [Abstract]
Net income as reported	$ 114,761	$ 146,318	$ 247,307	$ 387,692
Basic weighted-average shares	126,722	144,750	131,024	146,041
Common stock equivalents	677	1,525	1,008	1,438
Diluted weighted-average shares	127,399	146,275	132,032	147,479
Debt Instrument [Line Items]
Shares issued under stock incentive and employee stock purchase plans	342	205	950	860
Restricted Stock Units RSU And Employee Stock Option Member [Member]
Debt Instrument [Line Items]
Weighted-average number of antidilutive options and restricted stock units	3,640	754	2,761	1,378