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Segment and Geographic Data, Operating Margin Reconciliation (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 28, 2019 | Jun. 29, 2019 | Mar. 30, 2019 | Dec. 31, 2018 | Sep. 29, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Segment Operating Income |  |  |  |  |  |  |  |  | $ 543,696 | $ 755,888 | $ 581,740
Restructuring and Severance Costs | $ (16,884) | $ (7,255) | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | (24,139) | 0 | (11,273)
Consolidated Operating Income (Loss) | $ 24,178 | $ 51,028 | $ 79,489 | $ 107,735 | $ 119,667 | $ 138,098 | $ 123,293 | $ 104,062 | 262,430 | 485,120 | 324,005
Unallocated Other Income (Expense) |  |  |  |  |  |  |  |  | (36,132) | (68,344) | (44,641)
Consolidated Income Before Taxes |  |  |  |  |  |  |  |  | 226,298 | 416,776 | 279,364
Unallocated Amount to Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Operating margin reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Segment Operating Income |  |  |  |  |  |  |  |  | $ (257,127) | $ (270,768) | $ (246,462)

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