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Employee Retirement Plans Summary of the Plans' Net Periodic Pension Cost, Benefit Obligations, Funded Status, and Net Balance Sheet Position (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Net Periodic Pension Cost: |  |  |
Service cost | $ 4,400 | $ 3,800 | $ 1,700
Defined Benefit Plan, Net Periodic Benefit Cost | 27,300 | 23,400 | 1,500
Change in Benefit Obligation: |  |  |
Service cost | 4,400 | 3,800 | 1,700
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment | 3,305 |  |
Amounts recognized in balance sheet at year end: |  |  |
Accrued pension benefits | $ (334,511) | $ (322,988) |
Non US Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase | 0.60% | 1.60% |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 100.00% |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 100.00% | 100.00% |
Net Periodic Pension Cost: |  |  |
Service cost | $ 4,013 | $ 3,364 |
Interest cost | 32,748 | 41,606 |
Expected return on assets | (70,630) | (68,845) |
Amortization of net (gain) loss | (3,073) | (35) |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | (3,305) | 632 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement | (313) | 0 |
Defined Benefit Plan, Net Periodic Benefit Cost | (27,804) | (24,472) |
Change in Benefit Obligation: |  |  |
Benefit obligation – beginning of year | 1,478,493 | 1,476,370 |
Service cost | 4,013 | 3,364 |
Interest cost | 32,748 | 41,606 |
Employee contributions | 345 | 404 |
Actuarial (gain) loss | 21,058 | 297,754 |
Pension settlement gain | (4,017) | 0 |
Defined Benefit Plan, Plan Assets, Payment for Settlement | (3,254) | 0 |
Net benefit payments | (65,160) | (64,466) |
Benefit obligation – end of year | 1,615,244 | 1,478,493 | 1,476,370
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment |  | (706) |
Change in Plan Assets: |  |  |
Plan assets at fair value – beginning of year | 1,173,865 | 1,287,723 |
Company contributions | 3,062 | 17,758 |
Investment gain | 72,342 | 161,405 |
Employee contributions | 345 | 404 |
Benefit payments and plan expenses | (65,160) | (64,466) |
Exchange effect | 115,339 | (228,959) |
Plan assets at fair value – end of year | 1,296,539 | 1,173,865 | 1,287,723
Funded Status: |  |  |
Unfunded benefit obligation | (318,705) | (304,628) |
Amounts recognized in balance sheet at year end: |  |  |
Accrued pension benefits | (318,705) | (304,628) |
Pre-tax components in accumulated other comprehensive income at period end: |  |  |
Net actuarial loss | 243,315 | 206,490 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax | 44,316 | 181,384 |
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax | (7,041) | (35) |
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax | (763) | 0 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax | 313 | 0 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax | (36,825) | (181,349) |
Accumulated Benefit Obligation | $ 1,615,157 | $ 1,478,435 |
Assumed discount rate | 2.30% | 2.50% |
Expected return on assets | 6.20% | 6.20% |
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) | $ 144,459 | $ (275,833) |
USPlans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 100.00% |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 100.00% | 100.00% |
Net Periodic Pension Cost: |  |  |
Service cost | $ 402 | $ 456 |
Interest cost | 1,240 | 1,280 |
Expected return on assets | (821) | (777) |
Amortization of net (gain) loss | 330 | (126) |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 0 | 0 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement | 0 | 0 |
Defined Benefit Plan, Net Periodic Benefit Cost | 491 | 1,085 |
Change in Benefit Obligation: |  |  |
Benefit obligation – beginning of year | 31,949 | 31,830 |
Service cost | 402 | 456 |
Interest cost | 1,240 | 1,280 |
Employee contributions | 0 | 0 |
Actuarial (gain) loss | (760) | (722) |
Pension settlement gain | 0 | 0 |
Defined Benefit Plan, Plan Assets, Payment for Settlement | 0 | 0 |
Net benefit payments | (923) | (895) |
Benefit obligation – end of year | 31,908 | 31,949 | 31,830
Defined Benefit Plan, Accumulated Benefit Obligation, (Increase) Decrease for Settlement and Curtailment | 0 | 0 |
Change in Plan Assets: |  |  |
Plan assets at fair value – beginning of year | 13,589 | 12,987 |
Company contributions | 1,476 | 754 |
Investment gain | 1,960 | 743 |
Employee contributions | 0 | 0 |
Benefit payments and plan expenses | (923) | (895) |
Exchange effect | 0 | 0 |
Plan assets at fair value – end of year | 16,102 | 13,589 | $ 12,987
Funded Status: |  |  |
Unfunded benefit obligation | (15,806) | (18,360) |
Amounts recognized in balance sheet at year end: |  |  |
Accrued pension benefits | (15,806) | (18,360) |
Pre-tax components in accumulated other comprehensive income at period end: |  |  |
Net actuarial loss | 3,340 | 4,908 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax | (1,898) | (691) |
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax | 330 | (126) |
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax | 0 | 0 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax | 0 | 0 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax | 1,568 | 817 |
Accumulated Benefit Obligation | $ 31,908 | $ 31,041 |
Assumed discount rate | 3.50% | 3.90% |
Expected return on assets | 6.00% | 6.00% |
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) | $ 0 | $ 0 |
Money Market Instruments [Member] | Non US Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 32.00% |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 12.00% | 8.00% |
Money Market Instruments [Member] | USPlans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 4.00% |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 3.00% | 3.00% |
Other (real estate & commodities) [Member] | Non US Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 13.00% |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 11.00% | 12.00% |
Other (real estate & commodities) [Member] | USPlans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 8.00% |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 7.00% | 7.00% |
Cash and Cash Equivalents [Member] | Non US Plans [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage | 0.00% |  |
Defined Benefit Plan, Actual Plan Asset Allocations | 3.00% | 5.00% |

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of contributions received by defined benefit plan from participant which increase benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of contributions received by defined benefit plan from participant which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(i) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(ii) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(iv)(01) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(8) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount, before tax, of increase (decrease) to other comprehensive income from settlement and curtailment gain (loss) of defined benefit plan. + 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 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e689-108580 + Details
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- Definition Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + 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 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan. + References Reference 1: 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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