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Discontinued Operations - Loss from Discontinued Operations, Net of Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 27, 2020 | Sep. 27, 2020 | Dec. 29, 2019 | Dec. 27, 2020 | Dec. 29, 2019
Operating expenses: |  |  |  |  |
Net (loss) income | $ (28.4) |  | $ 3.9 | $ (137.2) | $ 5.4
Net income from discontinued operations attributable to noncontrolling interest | 0.3 |  | 0.3 | 0.6 | 0.3
Net (loss) income from discontinued operations attributable to controlling interest | (28.7) |  | 3.6 | (137.8) | 5.1
Discontinued Operations, Held-for-sale | LED Business |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Revenue, net | 105.2 |  | 119.2 | 206.3 | 234.3
Cost of revenue, net | 80.4 |  | 92.9 | 163.0 | 186.3
Gross profit | 24.8 |  | 26.3 | 43.3 | 48.0
Operating expenses: |  |  |  |  |
Research and development | 8.0 |  | 8.6 | 16.4 | 17.1
Sales, general and administrative | 9.0 |  | 7.8 | 16.9 | 16.4
Goodwill impairment | 6.9 | $ 105.7 | 0.0 | 112.6 | 0.0
Impairment on assets held for sale | 19.5 |  | 0.0 | 19.5 | 0.0
(Gain) loss on disposal or impairment of long-lived assets | (0.5) |  | 0.0 | (1.0) | 0.2
Other operating expense | 7.7 |  | 2.9 | 12.5 | 4.0
Operating (loss) income | (25.8) |  | 7.0 | (133.6) | 10.3
Non-operating income | (0.1) |  | (0.1) | 0.0 | (0.1)
(Loss) income before income taxes | (25.7) |  | 7.1 | (133.6) | 10.4
Income tax expense | 2.7 |  | 3.2 | 3.6 | 5.0
Net (loss) income | (28.4) |  | 3.9 | (137.2) | 5.4
Net income from discontinued operations attributable to noncontrolling interest | 0.3 |  | 0.3 | 0.6 | 0.3
Net (loss) income from discontinued operations attributable to controlling interest | $ (28.7) |  | $ 3.6 | $ (137.8) | $ 5.1

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