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Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) | 12 Months Ended
--- | ---
Oct. 31, 2021 | Oct. 31, 2020
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 814,100,000 | $ 583,500,000
Accumulated Amortization | (389,300,000) | (343,800,000)
Total | 424,800,000 | 239,700,000
Net impairment charge | $ 0 | $ 9,000,000
Intangible assets weighted average life | 12 years | 12 years
Aviation |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Net impairment charge |  | $ 5,600,000
Reduction in carrying amount |  | 13,800,000
Amortization of intangible assets |  | 8,200,000
Technical Solutions |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Net impairment charge |  | 3,400,000
Reduction in carrying amount |  | 8,700,000
Amortization of intangible assets |  | 5,300,000
Customer contracts and relationships |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 793,800,000 | 573,100,000
Accumulated Amortization | (378,500,000) | (333,600,000)
Total | 415,300,000 | 239,600,000
Trademarks and trade names |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 19,800,000 | 9,800,000
Accumulated Amortization | (10,400,000) | (9,800,000)
Total | 9,500,000 | 0
Contract rights and other |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 500,000 | 500,000
Accumulated Amortization | (400,000) | (400,000)
Total | $ 100,000 | $ 100,000

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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