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Earnings Per Share Information (Tables) | 9 Months Ended
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Jul. 31, 2018
Earnings Per Share [Abstract] |
Income per share calculation | The table below provides, for the periods indicated, information pertaining to the calculation of earnings per share, common stock equivalents, weighted-average number of antidilutive options, and shares issued (amounts in thousands):
|  | Nine months ended July 31, |  | Three months ended July 31,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Numerator: |  |  |  |  |  |  |  |
Net income as reported |  | $ | 437,175 |  |  | $ | 343,617 |  |  | $ | 193,258 |  |  | $ | 148,563 |
Plus interest and costs attributable to 0.5% Exchangeable Senior Notes, net of income tax benefit (a) |  |  |  |  | 1,147 |  |  |  |  |  | 378 |
Numerator for diluted earnings per share |  | $ | 437,175 |  |  | $ | 344,764 |  |  | $ | 193,258 |  |  | $ | 148,941 |
Denominator: |  |  |  |  |  |  |  |
Basic weighted-average shares |  | 153,290 |  |  | 163,186 |  |  | 151,257 |  |  | 163,478 |
Common stock equivalents (b) |  | 2,443 |  |  | 2,077 |  |  | 1,916 |  |  | 2,210 |
Shares attributable to 0.5% Exchangeable Senior Notes (a) |  |  |  |  | 5,864 |  |  |  |  |  | 5,874 |
Diluted weighted-average shares |  | 155,733 |  |  | 171,127 |  |  | 153,173 |  |  | 171,562 |
Other information: |  |  |  |  |  |  |  |
Weighted-average number of antidilutive options and restricted stock units (c) |  | 486 |  |  | 2,556 |  |  | 635 |  |  | 600 |
Shares issued under stock incentive and employee stock purchase plans |  | 899 |  |  | 2,762 |  |  | 19 |  |  | 788 |
(a) | On September 15, 2017, we redeemed these notes for cash.
(b) | Common stock equivalents represent the dilutive effect of outstanding in-the-money stock options using the treasury stock method and shares expected to be issued upon the conversion of restricted stock units under our equity award programs.
(c) | Weighted-average number of antidilutive options and restricted stock units are based upon the average closing price of our common stock on the New York Stock Exchange for the period.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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