Earnings Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Earnings Per Share [Abstract]
Net income as reported	$ 146,318	$ 193,258	$ 387,692	$ 437,175
Basic weighted-average shares	144,750	151,257	146,041	153,290
Common stock equivalents	1,525	1,916	1,438	2,443
Diluted weighted-average shares	146,275	153,173	147,479	155,733
Debt Instrument [Line Items]
Shares issued under stock incentive and employee stock purchase plans	205	19	860	899
Restricted Stock Units RSU And Employee Stock Option Member [Member]
Debt Instrument [Line Items]
Weighted-average number of antidilutive options and restricted stock units	754	635	1,378	486

Shares issued under stock incentive and employee stock purchase plans.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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