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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Net recognized gains losses on equity securities) (Tables) | 6 Months Ended
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Apr. 30, 2019
Investments, Debt and Equity Securities [Abstract] |
Gain (Loss) on Securities [Table Text Block] | Net recognized gains (losses) on equity investments were as follows:
| Three Months Ended | Six Months Ended
| April 30, 2019
| (in millions)
Net realized gains on investments sold | $ | 1 |  |  | $ | 1 |
Net unrealized gains (losses) on investments still held | (2 | ) |  | 3 |
Other-than-temporary impairments of investments | — |  |  | — |
Total | $ | (1 | ) |  | $ | 4 |

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