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Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 29, 2020 | Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning Balance | $ 1,815,705 | [1] | $ 1,772,278
Other comprehensive income/(loss) | (93,987) |  | 6,048
Ending Balance | 1,755,441 |  | 1,801,139
Foreign Currency Items |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning Balance | (241,994) |  | (251,102)
Other comprehensive income/(loss) before reclassifications | (93,575) |  | (2,852)
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax | 0 |  |
Other comprehensive income/(loss) | (93,575) |  | (2,852)
Ending Balance | (335,569) |  | (253,954)
Foreign Currency Items | Fixed Assets |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax |  |  | 0
Foreign Currency Items | Net Income |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax |  |  | 0
Defined Benefit Pension Items |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning Balance | (574,413) |  | (487,380)
Other comprehensive income/(loss) before reclassifications | 197 |  | (508)
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax | 5,583 |  |
Other comprehensive income/(loss) | 5,780 |  | 7,156
Ending Balance | (568,633) |  | (480,224)
Defined Benefit Pension Items | Fixed Assets |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax |  |  | 0
Defined Benefit Pension Items | Net Income |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax |  |  | 7,664
Cash Flow Hedges |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning Balance | (396) |  | (2,431)
Other comprehensive income/(loss) before reclassifications | (5,620) |  | 2,256
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax | 1,065 |  |
Other comprehensive income/(loss) | (4,555) |  | 1,864
Ending Balance | (4,951) |  | (567)
Cash Flow Hedges | Fixed Assets |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax |  |  | (45)
Cash Flow Hedges | Net Income |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax |  |  | (347)
Accumulated Other Comprehensive Loss |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Beginning Balance | (816,803) |  | (740,913)
Other comprehensive income/(loss) before reclassifications | (98,998) |  | (1,104)
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax | 6,648 |  |
Other comprehensive income/(loss) | (92,350) |  | 6,168
Ending Balance | $ (909,153) |  | (734,745)
Accumulated Other Comprehensive Loss | Fixed Assets |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax |  |  | (45)
Accumulated Other Comprehensive Loss | Net Income |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |
Amounts reclassified from accumulated other comprehensive income/(loss) net of tax |  |  | $ 7,317
[1] | The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.

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