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v3.20.2

Basis of Presentation and New Accounting Standards - Narrative (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 31, 2020 USD ($) | Sep. 27, 2020 USD ($) reportable_segments | Jun. 28, 2020 USD ($) | Sep. 29, 2019 USD ($) | Jun. 30, 2019 USD ($)
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |
Number of reportable segments | reportable_segments |  | 2 |  |  |
Accounting Standards Update [Extensible List] |  |  | us-gaap:AccountingStandardsUpdate201613Member |  |
Change in Accounting Principle, Accounting Standards Update, Transition Option Elected [Extensible List] |  |  | us-gaap:AccountingStandardsUpdate201602ModifiedRetrospectiveMember |  |
Stockholders' equity |  | $ 1,915,100,000 | $ 2,089,200,000 | $ 2,025,600,000 | $ 2,041,200,000
Maximum | LED Products | Subsequent Event |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |
Proceeds from divestiture of business | $ 300,000,000 |  |  |  |
Retained Earnings |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |
Stockholders' equity |  | $ (1,223,600,000) | (1,039,200,000) | $ (885,300,000) | $ (847,500,000)
Accounting Standards Update 2016-13 | Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Basis of Presentation and Changes in Significant Accounting Policies [Line Items] |  |  |  |  |
Stockholders' equity |  |  | $ 0 |  |

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