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Other Comprehensive Income (Loss) - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 28, 2020 | Mar. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Amortization of prior service and net actuarial loss | $ 222,384 | $ 250,272
Amortization of prior service and net actuarial loss | Reclassification out of Accumulated Other Comprehensive Income |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |
Amortization of prior service and net actuarial loss | $ 345 | $ 62

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