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Acquisition - Erwin Hymer Group - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 01, 2019 | Oct. 31, 2019 | Oct. 31, 2018 | Jul. 31, 2019 | Jul. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |
Goodwill, purchase accounting adjustments |  | $ 3,054 |  |  |
Goodwill |  | 1,361,265 | $ 377,693 | $ 1,358,032 | $ 377,693
Acquisition-related costs |  | $ 0 | 57,089 |  |
Other Expense |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquisition-related costs |  |  | 14,534 |  |
Trademarks |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Weighted average remaining life |  | 18 years |  |  |
Erwin Hymer Group |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill, purchase accounting adjustments |  | $ 3,054 |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 17 years |  |  |  |
Goodwill | $ 1,011,526 |  |  |  |
Business acquisition, goodwill, expected tax deductible amount | $ 242,000 |  |  |  |
Erwin Hymer Group | Acquisition costs |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquisition-related costs |  | $ 57,089 | 57,089 |  |
Erwin Hymer Group | Foreign Currency Contract Losses | Acquisition costs |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquisition-related costs |  |  | $ 42,555 |  |
Erwin Hymer Group | Trademarks |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible assets, amortization method | 20 years |  |  |  |
Erwin Hymer Group | Technology assets |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible assets, amortization method | 10 years |  |  |  |
Erwin Hymer Group | Dealer network |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible assets, amortization method | 20 years |  |  |  |
Erwin Hymer Group | Backlog |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Weighted average remaining life | 5 months |  |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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