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NEW ACCOUNTING PRONOUNCEMENTS- Textuals (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Nov. 01, 2018 | Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2019 | Jul. 31, 2018 | Oct. 31, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | 21.00% |  |  |  |
Accumulated deficit | $ (303) | $ (122) |  | $ (122) |  | $ (336)
Long-term Investments | 75 | 99 |  | 99 |  | $ 68
Impact of adoption of new guidance | (7) |  |  | (7) |  |
Impact of Adopting New Revenue Guidance |  |  |  |  |  |
Accumulated deficit | 23 |  |  |  |  |
Long-term Investments | 0 |  |  |  |  |
Impact of Adopting New Tax Effects in AOCI Guidance |  |  |  |  |  |
Accumulated deficit | 7 |  |  |  |  |
Long-term Investments | 0 |  |  |  |  |
Impact of Adopting New Intra-Entity Tax Guidance |  |  |  |  |  |
Accumulated deficit | (2) |  |  |  |  |
Long-term Investments | 0 |  |  |  |  |
Impact of Adopting New Investments Valuation Guidance |  |  |  |  |  |
Accumulated deficit | 5 |  |  |  |  |
Long-term Investments | $ 7 |  |  |  |  |
Impact of Adopting New Retirement Benefits Guidance |  |  |  |  |  |
Impact of adoption of new guidance |  | $ 2 | $ 4 | $ 7 | $ 19 |

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