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Post Retirement Benefit Plans - Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions | Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015
--- | --- | --- | ---
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | $ 171.0 | $ 202.5 |
Unrecognized prior service cost | (2.9) | (2.7) |
Unrecognized initial net obligation | 0.0 | 0.0 |
Accumulated other comprehensive loss (Pre-tax) | 168.1 | 199.8 | $ 188.6
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 10.3 | 22.2 |
Accrued benefit liability | (159.5) | (179.7) |
Accumulated other comprehensive loss | 168.1 | 199.8 | $ 188.6
Net amount recognized | 18.9 | 42.3 |
United States |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 94.7 | 145.4 |
Unrecognized prior service cost | (1.2) | (1.2) |
Unrecognized initial net obligation | 0.0 | 0.0 |
Accumulated other comprehensive loss (Pre-tax) | 93.5 | 144.2 |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 0.0 | 0.0 |
Accrued benefit liability | (119.0) | (137.7) |
Accumulated other comprehensive loss | 93.5 | 144.2 |
Net amount recognized | (25.5) | 6.5 |
Foreign Plan | Germany |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 14.9 | 18.4 |
Unrecognized prior service cost | 0.0 | 0.0 |
Unrecognized initial net obligation | 0.0 | 0.0 |
Accumulated other comprehensive loss (Pre-tax) | 14.9 | 18.4 |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 0.0 | 0.0 |
Accrued benefit liability | (39.9) | (41.8) |
Accumulated other comprehensive loss | 14.9 | 18.4 |
Net amount recognized | (25.0) | (23.4) |
Foreign Plan | United Kingdom |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 57.0 | 36.4 |
Unrecognized prior service cost | 0.0 | 0.0 |
Unrecognized initial net obligation | 0.0 | 0.0 |
Accumulated other comprehensive loss (Pre-tax) | 57.0 | 36.4 |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 1.9 | 13.7 |
Accrued benefit liability | 0.0 | 0.0 |
Accumulated other comprehensive loss | 57.0 | 36.4 |
Net amount recognized | 58.9 | 50.1 |
Foreign Plan | Netherlands |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 0.8 | (0.1) |
Unrecognized prior service cost | (1.7) | (1.5) |
Unrecognized initial net obligation | 0.0 | 0.0 |
Accumulated other comprehensive loss (Pre-tax) | (0.9) | (1.6) |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 5.7 | 6.0 |
Accrued benefit liability | 0.0 | 0.0 |
Accumulated other comprehensive loss | (0.9) | (1.6) |
Net amount recognized | 4.8 | 4.4 |
Foreign Plan | Other International |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |
Unrecognized net actuarial loss | 3.6 | 2.4 |
Unrecognized prior service cost | 0.0 | 0.0 |
Unrecognized initial net obligation | 0.0 | 0.0 |
Accumulated other comprehensive loss (Pre-tax) | 3.6 | 2.4 |
Amounts recognized in the Consolidated Balance Sheets consist of: |  |  |
Prepaid benefit cost | 2.7 | 2.5 |
Accrued benefit liability | (0.6) | (0.2) |
Accumulated other comprehensive loss | 3.6 | 2.4 |
Net amount recognized | $ 5.7 | $ 4.7 |

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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