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Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 27, 2019 | Sep. 28, 2018 | Sep. 29, 2017
Statement of Stockholders' Equity [Abstract] |  |  |
Change in pension and retiree medical plan liabilities | $ (30,750) | $ 17,058 | $ 24,380
(Gain) loss on derivative deferred taxes | 568 | (859) | 90
Issuances of equity securities deferred taxes |  | $ 1,015 | $ 1,015
Disposition of business, deferred taxes | 5,402 |  |
Deferred tax from ASC 606 | (10,285) |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Excluding Disposition of Business, Tax | $ 25,348 |  |

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