Income Taxes Effective Income Tax Rate Reconciliation (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 29, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
New Accounting Pronouncement, Early Adoption [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 236,900,000
Undistributed Earnings of Foreign Subsidiaries					$ 306,200,000
Transition Tax Charge			$ 22,100,000		$ 47,700,000
Federal statutory rate	21.00%	35.00%		35.00%	21.00%	21.00%	28.10%
State tax, net of federal benefit					0.50%	(1.40%)	(0.20%)
General Business Tax Credit					(1.80%)	(0.90%)	(0.80%)
Foreign earnings and losses taxed or benefitted at different rates					(17.10%)	(15.80%)	(16.70%)
Stock-based compensation					1.00%	0.70%	0.40%
Interest accrual for unrecognized tax benefits					0.90%	1.10%	2.10%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent					1.00%	9.00%	28.70%
Effective Income Tax Rate Reconciliation Tax On Global Intangible Low Taxed Income					7.90%	7.40%	0.00%
Effective Income Tax Rate Reconciliation, Deferred tax remeasurement					0.00%	0.00%	1.60%
Effective income tax rate reconciliation, settlement					(7.50%)	(33.40%)	0.00%
Other					(1.40%)	(0.20%)	(0.30%)
Income tax rate					3.50%	(9.70%)	43.30%