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Other Comprehensive Income Changes in accumulated other comprehensive income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Apr. 01, 2017
Accumulated Other Comprehensive Income/(Loss) [Line Items] |  |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax | $ (1,300) |
Other than Temporary Impairment Loss, Investments, Portion in Other Comprehensive Loss, Tax, Attributable to Parent, Held-to-maturity Securities | (44,900) |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax | 4,300 |
Currency Translation Adjustment | 21,802 | $ 10,835
Accumulated Other Comprehensive Income [Roll Forward] |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (266,419) |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 20,627 |
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax | 8,874 | $ 2,527
Reclassification from accumulated other comprehensive income, current period, net of tax | (12) |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 19,483 |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (246,936) |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax | 100 |
Stranded Tax Effects Reclassified from OCI to Retained Earnings | 1,132 |
Accumulated Translation Adjustment [Member] |  |
Accumulated Other Comprehensive Income/(Loss) [Line Items] |  |
Currency Translation Adjustment | 21,802 |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (69,721) |
Reclassification from accumulated other comprehensive income, current period, net of tax | 0 |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 21,802 |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (47,919) |
Stranded Tax Effects Reclassified from OCI to Retained Earnings | 0 |
Accumulated Defined Benefit Plans Adjustment [Member] |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (203,063) |
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax | (9,361) |
Reclassification from accumulated other comprehensive income, current period, net of tax | 0 |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | (8,874) |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (211,937) |
Stranded Tax Effects Reclassified from OCI to Retained Earnings | (500) |
Interest Rate Swap [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | 6,365 |
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax | 8,186 |
Reclassification from accumulated other comprehensive income, current period, net of tax | (12) |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 6,555 |
Accumulated Other Comprehensive Income (Loss), Net of Tax | 12,920 |
Stranded Tax Effects Reclassified from OCI to Retained Earnings | $ 1,600 |

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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- Definition Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 + Details
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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b,c) -URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 + Details
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