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RESTRUCTURING AND OTHER RELATED COSTS - ROLLFORWARD (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2025 | Jan. 31, 2025 | Apr. 30, 2024 | Apr. 30, 2025 | Apr. 30, 2024
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Income statement expense | $ 56 |  | $ 1 | $ 57 | $ 4
Restructuring expense since inception | 179 |  |  | 179 |
FY25 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense since inception | 56 |  |  | 56 |
FY24 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense since inception | 73 |  |  | 73 |
FY23 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense since inception | 50 |  |  | 50 |
Employee Severance |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve, Beginning Balance | 5 | $ 13 |  | 13 |
Income statement expense | 56 | 1 |  |  |
Non-cash settlement | (5) |  |  |  |
Cash Payments | (5) | (9) |  |  |
Currency translation impact Gain (Loss) | 1 |  |  |  |
Restructuring Reserve, Ending Balance | 52 | 5 |  | 52 |
Employee Severance | FY25 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve, Beginning Balance | 0 |  |  |  |
Income statement expense | 56 |  |  |  |
Non-cash settlement | (5) |  |  |  |
Cash Payments | (1) |  |  |  |
Currency translation impact Gain (Loss) | 1 |  |  |  |
Restructuring Reserve, Ending Balance | 51 | 0 |  | 51 |
Employee Severance | FY24 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve, Beginning Balance | 4 | 11 |  | 11 |
Income statement expense |  | 1 |  | 1 |
Cash Payments | (3) | (8) |  |  |
Restructuring Reserve, Ending Balance | 1 | $ 4 |  | 1 |
Employee Severance | FY23 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Cash Payments | $ (1) |  |  | $ (2) |

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