Basis Of Presentation Basis of Presentation (Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Sep. 29, 2018	Sep. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle
Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings	$ 0	$ 0	$ 47,077	$ 0
Accounting Standards Update 2017-07 | Operating Expense
New Accounting Pronouncements or Change in Accounting Principle
Anticipated Impact of Adoption						$ 12,600
Accounting Standards Update 2017-07 | Other Nonoperating Income (Expense)
New Accounting Pronouncements or Change in Accounting Principle
Anticipated Impact of Adoption						$ 12,600
Scenario, Forecast | Accounting Standards Update 2017-07 | Operating Expense
New Accounting Pronouncements or Change in Accounting Principle
Anticipated Impact of Adoption					$ 6,800
Scenario, Forecast | Accounting Standards Update 2017-07 | Other Nonoperating Income (Expense)
New Accounting Pronouncements or Change in Accounting Principle
Anticipated Impact of Adoption					$ 6,800