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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 28, 2020 | Jun. 27, 2020 | Jun. 29, 2019 | Jun. 30, 2018
Net operating loss carryforwards |  |  |  |
True-up adjustment to capitalized research costs deferred tax asset balance |  | $ 37.5 |  |
Undistributed earnings of certain foreign subsidiaries |  | 9.3 |  |
Estimated additional U.S. income or foreign withholding taxes that would have to be provided if earnings of foreign subsidiaries were repatriated to the U.S. |  | 1.2 |  |
Chinese withholding tax expense |  | 32.5 |  |
Foreign earnings repatriated | $ 316.4 | 324.0 |  |
Accrual for withholding taxes | $ 31.6 |  |  |
Withholding income tax on repatriation of foreign earnings |  | 19.5 |  |
Change in tax rate, deferred tax asset, tax benefit |  |  |  | $ 4.5
Change in tax rate, tax benefit |  |  |  | 2.0
Change in tax rate, change in deferred tax assets |  |  |  | 734.9
Change in tax rate, operating loss carryforwards |  |  |  | 117.7
Increase (decrease) in deferred tax asset valuation allowances |  | 0.2 | $ 23.2 | (712.9)
Portion of unrecognized tax benefits, if recognized, would impact the effective tax rate |  | 8.5 |  |
Portion of unrecognized tax benefits, if recognized, would impact the valuation allowance |  | 39.9 |  |
Accrued interest and penalties related to unrecognized tax benefits |  | 2.7 | $ 3.7 | $ 1.9
Increase in accrued interest and penalties related to unrecognized tax benefits |  | 0.9 |  |
Federal |  |  |  |
Net operating loss carryforwards |  |  |  |
Operating loss carryforwards |  | 4,752.2 |  |
Research and other tax credit carryforwards |  | 105.8 |  |
State |  |  |  |
Net operating loss carryforwards |  |  |  |
Operating loss carryforwards |  | 575.8 |  |
Research and other tax credit carryforwards |  | 52.6 |  |
Foreign |  |  |  |
Net operating loss carryforwards |  |  |  |
Operating loss carryforwards |  | 590.2 |  |
Research and other tax credit carryforwards |  | $ 0.9 |  |

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