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ACQUISITIONS - Erwin Hymer - Additional Information (Details) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Feb. 02, 2019 | Feb. 01, 2019 | Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2019
Business Acquisition [Line Items] |  |  |  |  |
Measurement period adjustment |  |  | $ 2,728,000 | $ 871,000 |
Goodwill |  |  | 1,563,255,000 | 1,476,541,000 | $ 1,358,032,000
Impairment charges |  |  | 0 | 10,057,000 | 0
Payments to acquire interest in joint venture |  |  | $ 0 | 0 | 6,500,000
North America | Subsidary Loan |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Impairment charges |  |  |  |  | 52,501,000
Fair Value Adjustment to Inventory | Proforma Income |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Fair value adjustment | $ 61,418,000 |  |  |  |
Other Expense |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquisition related costs |  |  |  |  | 44,089,000
Backlog |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life |  |  | 9 months |  |
Erwin Hymer Group |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Measurement period adjustment |  |  |  | 1,282,000 |
Acquired finite-lived intangible assets, weighted average useful life |  | 17 years |  |  |
Goodwill |  | $ 1,009,754,000 |  |  |
Business acquisition, goodwill, expected tax deductible amount |  | 311,000,000 |  |  |
Guarantee liabilities related to former EHG North American subsidiaries |  | $ 115,668,000 |  |  |
Guarantee liabilities |  |  | $ 0 | $ 0 |
Erwin Hymer Group | Acquisition Costs |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquisition related costs |  |  |  |  | 114,866,000
Erwin Hymer Group | Acquisition Costs | Foreign Currency Contract Losses |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquisition related costs |  |  |  |  | $ 70,777,000
Erwin Hymer Group | Dealer network |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life |  | 20 years |  |  |
Erwin Hymer Group | Trademarks |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life |  | 20 years |  |  |
Erwin Hymer Group | Technology-Based Intangible Assets |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life |  | 10 years |  |  |
Erwin Hymer Group | Backlog |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life |  | 5 months |  |  |

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