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INCOME TAXES INCOME TAXES - Uncertain Tax Positions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Unrecognized Tax Benefits Rollforward |  |  |
Balance, beginning of year | $ 206 | $ 214 | $ 224
Additions for tax positions related to the current year | 6 | 7 | 27
Additions for tax positions from prior years | 0 | 12 | 2
Reductions for tax positions from prior years | 0 | 2 | 13
Statute of limitations expirations | 17 | 25 | 26
Balance, end of year | 195 | 206 | 214
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract] |  |  |
Unrecognized tax benefit including interest and penalties | 240 |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 215 |  |
Unrecognized tax benefits that would not impact the effective tax rate | 25 |  |
Interest and penalties accrued related to unrecognized tax benefits accrued and reported | 45 | 36 |
Tax Interest and Penalties |  |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract] |  |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | $ 8 | $ 9 | $ 11

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=120406818&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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