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