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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 |

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