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Joint Ventures and VIE's (Narrative) (Details) - USD ($) $ in Thousands | Oct. 02, 2020 | Sep. 27, 2019 | Sep. 28, 2018
--- | --- | --- | ---
Variable Interest Entity [Line Items] |  |  |
VIE unconsolidated assets | $ 12,354,353 | $ 11,462,711 |
Equity method investments exceeds its share of venture net assets | 71,100 |  |
AWE ML |  |  |
Variable Interest Entity [Line Items] |  |  |
Investment in equity securities | $ 38,000 |  |
Ownership percentage | 24.50% |  |
Unconsolidated Joint Venture | VIE, not primary beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
VIE unconsolidated assets | $ 64,100 | 61,100 |
VIE unconsolidated liabilities | 63,000 | 63,700 |
Investment in equity securities | 161,300 | 157,900 |
Unconsolidated Joint Venture | VIE, not primary beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
VIE unconsolidated assets | 1,731,900 | 1,473,400 |
VIE unconsolidated liabilities | 1,520,700 | 1,165,700 |
Equity method investments exceeds its share of venture net assets | 82,200 | 48,500 | $ 47,900
Accounts receivable from unconsolidated joint venture | $ 8,300 | $ 19,500 |

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