Income Taxes Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 30, 2017	Dec. 30, 2017	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
New Accounting Pronouncement, Early Adoption [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	$ 236.9
Effective Income Tax Rate Reconciliation, Transition Tax Liability, Amount		$ 248.0
Deferred Tax Liabilities, Undistributed Foreign Earnings		11.1
Effective Income Tax Rate Reconciliation, Deferred tax remeasurement, Amount		$ 13.7
Undistributed Earnings of Foreign Subsidiaries			$ 513.7
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries			$ 25.5
Federal statutory rate			28.10%	35.00%	35.00%
State tax, net of federal benefit			(0.20%)	0.20%	0.60%
General business credits			(0.80%)	(1.30%)	(2.80%)
Foreign earnings and losses taxed or benefitted at different rates			16.70%	20.20%	21.70%
Stock-based compensation			0.40%	0.10%	4.70%
Interest accrual for unrecognized tax benefits			2.10%	2.10%	3.20%
Effective Income Tax Rate Reconciliation, Non-deductible Goodwill, Percent			0.00%	0.00%	2.50%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent			28.70%	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Deferred tax remeasurement			1.60%	0.00%	0.00%
Other			(0.30%)	0.40%	(0.10%)
Income tax rate			43.30%	15.90%	20.20%