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Earnings Per Share | 9 Months Ended
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Jul. 31, 2020
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share
Periods Ended July 31, | Three Months |  | Nine Months
(In millions, except per share amounts) | 2020 |  | 2019 |  | 2020 |  | 2019
Net income | $ | 55.2 |  |  | $ | 120.1 |  |  | $ | 157.2 |  |  | $ | 345.7 |
Basic: |  |  |  |  |  |  |
Weighted average common shares | 49.1 |  |  | 49.5 |  |  | 49.1 |  |  | 49.4 |
Basic earnings per share | $ | 1.13 |  |  | $ | 2.43 |  |  | $ | 3.20 |  |  | $ | 7.00 |
Diluted: |  |  |  |  |  |  |
Weighted average common shares | 49.1 |  |  | 49.5 |  |  | 49.1 |  |  | 49.4 |
Effect of dilutive stock options | 0.4 |  |  | 0.6 |  |  | 0.5 |  |  | 0.6 |
Diluted weighted average common shares | 49.5 |  |  | 50.1 |  |  | 49.6 |  |  | 50.0 |
Diluted earnings per share | $ | 1.12 |  |  | $ | 2.40 |  |  | $ | 3.17 |  |  | $ | 6.91 |
The following table sets forth stock options to purchase our common stock and restricted stock units that were not included in the diluted earnings per share calculation because their effect would have been antidilutive for the periods presented:
Periods Ended July 31, | Three Months |  | Nine Months
(In thousands, except exercise prices) | 2020 |  | 2019 |  | 2020 |  | 2019
Stock option shares excluded | 392 |  |  | — |  |  | 207 |  |  | 198 |
Range of exercise prices | $254.77-$304.54 |  |  | n/a |  |  | $ | 304.54 |  |  | $ | 254.77 |
Restricted stock units excluded | 1 |  |  | 18 |  |  | 1 |  |  | 19 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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