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Acquisitions - Additional Information (Detail) € in Thousands, $ in Thousands |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 02, 2019 USD ($) | Feb. 01, 2019 USD ($) shares | Feb. 01, 2019 EUR (€) shares | Jul. 31, 2019 USD ($) | Jul. 31, 2019 USD ($) | Jul. 31, 2018 USD ($) | Jul. 31, 2017 USD ($) | Feb. 01, 2019 EUR (€)
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  | $ 7,864,758 | $ 8,328,909 | $ 7,246,952 |
Gross Profit |  |  |  |  | 973,094 | 1,164,666 | 1,043,583 |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |  |  |  |  | 184,666 | 633,029 | 556,386 |
Amortization of Intangible Assets |  |  |  |  | 75,638 | 55,118 | 63,925 |
Goodwill |  |  |  | $ 1,358,032 | 1,358,032 | 377,693 | $ 377,693 |
Step-up Costs [Member] |  |  |  |  |  |  |  |
Purchase accounting of acquired inventory | $ 61,418 |  |  |  |  |  |  |
Subsidary Loan [Member] | North America [Member] |  |  |  |  |  |  |  |
Asset Impairment Charges |  |  |  |  | 52,501 | 106,561 |  |
Proforma Income [Member] |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  | 114,866 |  |  |
Proforma Income [Member] | Fair Value Adjustment to Inventory [Member] |  |  |  |  |  |  |  |
Assets, Fair Value Adjustment | $ 61,418 |  |  |  |  |  |  |
Asset Based Credit Facility [Member] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 750,000 |  | 750,000 | 750,000 |  |  |
Other Expense [Member] |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  | $ 44,089 |  |  |
Trademarks [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  | 18 years |  |  |
Term Loan [Member] |  |  |  |  |  |  |  |
Debt Instrument, Term |  | 7 years | 7 years |  |  |  |  |
Amount of debt financing |  |  |  | 1,832,341 | $ 1,832,341 |  |  |
Us Tranche [Member] | Term Loan [Member] |  |  |  |  |  |  |  |
Amount of debt financing |  |  |  | 849,550 | 849,550 |  |  |
Euro Tranche [Member] | Term Loan [Member] |  |  |  |  |  |  |  |
Amount of debt financing |  | $ 708,584 |  | 685,373 | 685,373 |  |  | € 617,718
Erwin Hymer Group [Member] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  | $ 1,760,000 | € 1,530,000 |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares |  | 2,256,492 | 2,256,492 |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned |  | $ 144,200 |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Subsidiaries Guarantee Obligations |  | 115,668 |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  |  |  |  | 1,486,978 |  |  |
Gross Profit |  |  |  |  | 150,039 |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |  |  |  |  | (5,946) |  |  |
Amortization of Intangible Assets |  |  |  |  | 11,239 |  |  |
Business Combination Available Cash |  | $ 95,000 |  |  |  |  |  |
Debt Instrument, Term |  | 7 years | 7 years |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  | 17 years | 17 years |  |  |  |  |
Goodwill |  | $ 1,008,472 |  |  |  |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  |  | 242,000 | 242,000 |  |  |
Business Acquisition Pro Forma Professional Fee |  |  |  |  | 1,677 | $ 19,376 |  |
Increase In Goodwill |  |  |  | 14,045 |  |  |  |
Erwin Hymer Group [Member] | Asset Based Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument, Term |  | 5 years | 5 years |  |  |  |  |
Amount of debt financing |  | $ 100,000 |  |  |  |  |  |
Erwin Hymer Group [Member] | Acquisition Costs [Member] |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  | 114,866 |  |  |
Erwin Hymer Group [Member] | Acquisition Costs [Member] | Foreign Currency Contract Losses [Member] |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  | 70,777 |  |  |
Erwin Hymer Group [Member] | Other Current Liabilities [Member] |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Accrued Liabilities Current |  |  |  | $ 5,576 | 5,576 |  |  |
Erwin Hymer Group [Member] | Trademarks [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 20 years | 20 years |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Method | straight-line basis |  |  |  |  |  |  |
Erwin Hymer Group [Member] | Technology-Based Intangible Assets [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 10 years | 10 years |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Method | straight-line basis |  |  |  |  |  |  |
Erwin Hymer Group [Member] | Dealer Network [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 20 years |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Method | accelerated basis |  |  |  |  |  |  |
Erwin Hymer Group [Member] | Backlog [Member] |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 5 months |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Method | straight-line basis |  |  |  |  |  |  |
Erwin Hymer Group [Member] | Other Intangible Assets [Member] |  |  |  |  |  |  |  |
Amortization of Intangible Assets |  |  |  |  | $ 14,355 |  |  |
Finite-Lived Intangible Assets, Amortization Method |  | straight-line basis | straight-line basis |  |  |  |  |
Erwin Hymer Group [Member] | Term Loan [Member] |  |  |  |  |  |  |  |
Amount of debt financing |  | $ 2,100,000 |  |  |  |  |  |
Erwin Hymer Group [Member] | Us Tranche [Member] |  |  |  |  |  |  |  |
Amount of debt financing |  | 1,400,000 |  |  |  |  |  |
Erwin Hymer Group [Member] | Euro Tranche [Member] |  |  |  |  |  |  |  |
Amount of debt financing | € |  |  |  |  |  |  |  | € 600,000
Erwin Hymer Group [Member] | Euro Tranche [Member] | Term Loan [Member] |  |  |  |  |  |  |  |
Amount of debt financing |  | $ 700,000 |  |  |  |  |  |

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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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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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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e961-128460 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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