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Accumulated other comprehensive loss - Summary of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2024 | Jan. 31, 2024 | Apr. 30, 2023 | Jan. 31, 2023 | Apr. 30, 2024 | Apr. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | $ 2,723,967 | $ 2,598,060 | $ 2,446,685 | $ 2,294,375 | $ 2,598,060 | $ 2,294,375
Pension and other postretirement plan adjustments, net of tax of $135 | 19 |  | (173) |  | (440) | (749)
Foreign currency translation adjustments (a) | (32,620) | 43,943 | (290) | 76,821 | 11,323 | 76,531
Ending balance | 2,788,271 | 2,723,967 | 2,497,002 | 2,446,685 | 2,788,271 | 2,497,002
Amortization of prior service costs and net actuarial losses, tax |  |  |  |  | 135 |
Other Comprehensive Income (Loss), Net Investment Hedge, Tax |  |  |  |  | 1,347 |
Other Comprehensive Income (Loss), Net Investment Hedge, Gross |  |  |  |  | (4,507) |
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance | (152,957) | (196,441) | (131,537) | (207,782) | (196,441) | (207,782)
Foreign currency translation adjustments (a) | (32,620) | 43,943 | (290) | 76,821 |  |
Ending balance | (185,558) | (152,957) | $ (132,000) | $ (131,537) | (185,558) | $ (132,000)
Cumulative translation adjustments |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  | (133,280) |  |  | (133,280) |
Pension and other postretirement plan adjustments, net of tax of $135 |  |  |  |  | 0 |
Foreign currency translation adjustments (a) |  |  |  |  | 11,323 |
Ending balance | (121,957) |  |  |  | (121,957) |
Pension and postretirement benefit plan adjustments |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Beginning balance |  | $ (63,161) |  |  | (63,161) |
Pension and other postretirement plan adjustments, net of tax of $135 |  |  |  |  | (440) |
Foreign currency translation adjustments (a) |  |  |  |  | 0 |
Ending balance | $ (63,601) |  |  |  | $ (63,601) |

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