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Acquisitions - GCA Preliminary Purchase Price Allocation (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017
Business Acquisition [Line Items] |  |  |
Goodwill | $ 1,835.4 | $ 1,834.8 | $ 1,864.2
Acquired Intangible Assets |  |  |
Amortization period for acquired intangible assets | 12 years |  |
GCA Holding Corp. |  |  |
Business Acquisition [Line Items] |  |  |
Cash and cash equivalents |  | 0.2 |
Trade accounts receivable |  | 116.3 |
Prepaid expenses and other current assets |  | 12.0 |
Property, plant and equipment |  | 37.3 |
Goodwill |  | 926.9 |
Other assets |  | 4.0 |
Trade accounts payable |  | (9.6) |
Insurance reserves |  | (35.2) |
Income taxes payable |  | (8.6) |
Accrued liabilities |  | (38.8) |
Deferred income tax liability, net |  | (85.6) |
Other liabilities |  | (8.1) |
Net assets acquired |  | 1,258.8 |
Acquired Receivables |  |  |
Trade accounts receivable, gross |  | 121.9 |
Estimated uncollectible trade accounts receivable |  | 5.6 |
GCA Holding Corp. | Customer relationships |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | $ 340.0 |
Acquired Intangible Assets |  |  |
Amortization period for acquired intangible assets |  | 15 years |
GCA Holding Corp. | Trade names |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets |  | $ 8.0 |
Acquired Intangible Assets |  |  |
Amortization period for acquired intangible assets |  | 2 years |

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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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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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- Definition Amount of other liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e31917-109318 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=116868840&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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