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Post Retirement Benefit Plans - Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
--- | --- | --- | ---
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | $ 149.7 | $ 171.0 |
Unrecognized prior service cost | 0.7 | (2.9) |
Accumulated other comprehensive loss (Pre-tax) | 150.4 | 168.1 | $ 199.8
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 10.4 | 10.3 |
Accrued benefit liability | (78.0) | (159.5) |
Accumulated other comprehensive loss | 150.4 | 168.1 | $ 199.8
Net amount recognized | 82.8 | 18.9 |
United States |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 82.9 | 94.7 |
Unrecognized prior service cost | (1.1) | (1.2) |
Accumulated other comprehensive loss (Pre-tax) | 81.8 | 93.5 |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 0.0 | 0.0 |
Accrued benefit liability | (39.9) | (119.0) |
Accumulated other comprehensive loss | 81.8 | 93.5 |
Net amount recognized | 41.9 | (25.5) |
Foreign Plan | Germany |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 13.1 | 14.9 |
Unrecognized prior service cost | 0.0 | 0.0 |
Accumulated other comprehensive loss (Pre-tax) | 13.1 | 14.9 |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 0.0 | 0.0 |
Accrued benefit liability | (38.1) | (39.9) |
Accumulated other comprehensive loss | 13.1 | 14.9 |
Net amount recognized | (25.0) | (25.0) |
Foreign Plan | United Kingdom |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 49.5 | 57.0 |
Unrecognized prior service cost | 3.5 | 0.0 |
Accumulated other comprehensive loss (Pre-tax) | 53.0 | 57.0 |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 2.3 | 1.9 |
Accrued benefit liability | 0.0 | 0.0 |
Accumulated other comprehensive loss | 53.0 | 57.0 |
Net amount recognized | 55.3 | 58.9 |
Foreign Plan | Netherlands |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 1.5 | 0.8 |
Unrecognized prior service cost | (1.7) | (1.7) |
Accumulated other comprehensive loss (Pre-tax) | (0.2) | (0.9) |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 5.0 | 5.7 |
Accrued benefit liability | 0.0 | 0.0 |
Accumulated other comprehensive loss | (0.2) | (0.9) |
Net amount recognized | 4.8 | 4.8 |
Foreign Plan | Other International |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 2.7 | 3.6 |
Unrecognized prior service cost | 0.0 | 0.0 |
Accumulated other comprehensive loss (Pre-tax) | 2.7 | 3.6 |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 3.1 | 2.7 |
Accrued benefit liability | 0.0 | (0.6) |
Accumulated other comprehensive loss | 2.7 | 3.6 |
Net amount recognized | $ 5.8 | $ 5.7 |

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