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Stockholders' Deficit - Tax Effects Related to Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2021 | Apr. 30, 2020 | Apr. 30, 2021 | Apr. 30, 2020
Components of accumulated other comprehensive income, net of taxes |  |  |  |
Tax provision on other comprehensive income | $ (41) | $ (22) | $ (9) | $ (33)
Tax provision on unrealized gains arising during the period |  |  |  |
Components of accumulated other comprehensive income, net of taxes |  |  |  |
Tax effects on change arising during the period | 0 | 0 | (1) | 0
Net unrealized (losses) gains on cash flow hedges |  |  |  |
Components of accumulated other comprehensive income, net of taxes |  |  |  |
Tax effects on change arising during the period | (7) | (33) | 40 | (49)
Tax effects on reclassification into earnings | (17) | 16 | (21) | 26
Tax provision on other comprehensive income | (24) | (17) | 19 | (23)
Tax provision on gains arising during the period |  |  |  |
Components of accumulated other comprehensive income, net of taxes |  |  |  |
Tax effects on change arising during the period | (11) | 0 | (11) | 0
Tax benefit on amortization of actuarial loss and prior service benefit |  |  |  |
Components of accumulated other comprehensive income, net of taxes |  |  |  |
Tax effects on reclassification into earnings | (5) | (5) | (10) | (10)
Unrealized components of defined benefit plans |  |  |  |
Components of accumulated other comprehensive income, net of taxes |  |  |  |
Tax provision on other comprehensive income | (16) | (5) | (21) | (10)
Change in cumulative translation adjustment |  |  |  |
Components of accumulated other comprehensive income, net of taxes |  |  |  |
Tax provision on other comprehensive income | $ (1) | $ 0 | $ (6) | $ 0

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