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Stockholders' Deficit - Schedule of Changes and Reclassifications Related to Other Comprehensive Income, Net of Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2020 | Jul. 31, 2019 | Jul. 31, 2020 | Jul. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Unrealized gains arising during the period |  |  | $ (238) |
Gains reclassified into earnings |  |  | (145) |
Other comprehensive (loss) income, net of taxes | $ (555) | $ 37 | (380) | $ (18)
Change in unrealized gains (losses) on available-for-sale securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Unrealized gains arising during the period | 2 | 0 | 1 | 0
Gains reclassified into earnings | 0 | 0 | 0 | 3
Other comprehensive (loss) income, net of taxes | 2 | 0 | 1 | 3
Net unrealized gains (losses) on cash flow hedges |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Unrealized gains arising during the period | (480) |  | (238) |
Gains reclassified into earnings | (105) |  | (191) |
Other comprehensive (loss) income, net of taxes | (585) |  | (429) |
Net unrealized gains (losses) on cash flow hedges |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Unrealized gains arising during the period |  | 173 |  | 248
Gains reclassified into earnings |  | (72) |  | (225)
Other comprehensive (loss) income, net of taxes |  | 101 |  | 23
Tax benefit on losses arising during the period |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Unrealized gains arising during the period | (4) | (12) | (5) | (15)
Tax provision on amortization of actuarial loss and prior service benefit |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Gains reclassified into earnings | 15 | 8 | 46 | 25
Curtailments, settlements and other |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Gains reclassified into earnings | 2 | (38) | 3 | (38)
Change in unrealized components of defined benefit plans |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Unrealized gains arising during the period |  |  | (5) |
Gains reclassified into earnings |  |  | 46 |
Other comprehensive (loss) income, net of taxes | 13 | (42) | 44 | (28)
Change in cumulative translation adjustment |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Unrealized gains arising during the period |  |  | 4 |
Gains reclassified into earnings |  |  | 0 |
Change in cumulative translation adjustment | $ 15 | $ (22) | $ 4 | $ (16)

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