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Commitments and Contingencies (Details) |  |  |  |  |  | 12 Months Ended
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Aug. 12, 2019 statement | May 17, 2019 patent | May 01, 2019 patent | Oct. 05, 2018 statement | Jan. 03, 2018 executive | Aug. 31, 2019 USD ($) | Aug. 31, 2018 USD ($) | Aug. 31, 2017 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |  |
Minimum lease payments under noncancelable lease for fiscal 2020 |  |  |  |  |  | $ 16,700,000 |  |
Minimum lease payments under noncancelable lease for fiscal 2021 |  |  |  |  |  | 13,500,000 |  |
Minimum lease payments under noncancelable lease for fiscal 2022 |  |  |  |  |  | 9,900,000 |  |
Minimum lease payments under noncancelable lease for fiscal 2023 |  |  |  |  |  | 7,200,000 |  |
Minimum lease payments under noncancelable lease for fiscal 2024 |  |  |  |  |  | 4,600,000 |  |
Minimum lease payments under noncancelable lease for fiscal year after 2023 |  |  |  |  |  | 16,800,000 |  |
Operating Leases, Rent Expense, Net [Abstract] |  |  |  |  |  |  |  |
Total rent expense |  |  |  |  |  | 22,600,000 | $ 22,300,000 | $ 20,000,000.0
Recorded Unconditional Purchase Obligation, Fiscal Year Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Purchase obligations in fiscal 2020 |  |  |  |  |  | 347,200,000 |  |
Purchase obligations in fiscal 2021 |  |  |  |  |  | 5,000,000.0 |  |
Purchase obligations in fiscal 2022 |  |  |  |  |  | 5,000,000.0 |  |
Purchase obligations extending beyond August 31, 2022 |  |  |  |  |  | $ 0 |  |
Standard product warranty period |  |  |  |  |  | 5 years |  |
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  | $ 27,300,000 | 22,000,000.0 | 15,500,000
Warranty and recall costs |  |  |  |  |  | 18,700,000 | 32,400,000 | 39,800,000
Payments and other deductions |  |  |  |  |  | (19,700,000) | (27,700,000) | (33,300,000)
Acquired warranty and recall liabilities |  |  |  |  |  | 0 | 600,000 | 0
ASC 606 adjustments |  |  |  |  |  | (14,800,000) | 0 | 0
Ending balance |  |  |  |  |  | $ 11,500,000 | $ 27,300,000 | $ 22,000,000.0
Total work force covered by collective bargaining agreements |  |  |  |  |  |  |  |
Recorded Unconditional Purchase Obligation, Fiscal Year Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Portion of revenues (percent) |  |  |  |  |  | 67.00% |  |
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year |  |  |  |  |  |  |  |
Recorded Unconditional Purchase Obligation, Fiscal Year Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Portion of revenues (percent) |  |  |  |  |  | 57.00% |  |
Lighting Science Group Patent Litigation |  |  |  |  |  |  |  |
Recorded Unconditional Purchase Obligation, Fiscal Year Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Number of patents under alleged infringement claims (patents) | patent |  | 7 | 8 |  |  |  |  |
Number of patents under dropped claims (patents) | patent |  | 1 |  |  |  |  |  |
Securities Class Action |  |  |  |  |  |  |  |
Recorded Unconditional Purchase Obligation, Fiscal Year Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Number of initial claims under class action | statement | 42 |  |  |  |  |  |  |
Number of claims dismissed | statement |  |  |  | 47 |  |  |  |
Number of claims allowed | statement | 5 |  |  |  |  |  |  |
Former Executive | Securities Class Action |  |  |  |  |  |  |  |
Recorded Unconditional Purchase Obligation, Fiscal Year Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Number of former executives accused | executive |  |  |  |  | 1 |  |  |

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