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Capital Shares (Tables) | 12 Months Ended
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Oct. 31, 2018
Equity [Abstract] |
Capital Shares | Common shares repurchased as part of publicly announced programs during 2018, 2017 and 2016 were as follows:
|  | Number |  |  | Total |  |  | Average |
Year |  | of Shares |  |  | Amount |  |  | per Share |
2018 |  |  | 145 |  |  | $ | 18,939 |  |  | $ | 130.21 |
2017 |  |  | — |  |  | $ | — |  |  | $ | — |
2016 |  |  | 447 |  |  | $ | 31,877 |  |  | $ | 71.37 |

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