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Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2013
BENEFIT PLANS [Abstract] |
Schedule of Defined Benefit Plans Disclosures |
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits |  | Total
| 2013 |  | 2012 |  | 2013 |  | 2012 |  | 2013 |  | 2012 |  | 2013 |  | 2012
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of year | $ | 156,804 |  |  | $ | 146,492 |  |  | $ | 798,657 |  |  | $ | 717,503 |  |  | $ | 11,267 |  |  | $ | 13,257 |  |  | $ | 966,728 |  |  | $ | 877,252 |
Service cost, gross | 494 |  |  | 455 |  |  | 30,315 |  |  | 27,312 |  |  | 216 |  |  | 333 |  |  | 31,025 |  |  | 28,100 |
Interest cost | 5,755 |  |  | 6,093 |  |  | 19,566 |  |  | 22,104 |  |  | 405 |  |  | 539 |  |  | 25,726 |  |  | 28,736 |
Actuarial losses (gains) | (18,226 | ) |  | 10,184 |  |  | (11,477 | ) |  | 68,807 |  |  | (1,988 | ) |  | (2,059 | ) |  | (31,691 | ) |  | 76,932 |
Plan amendments and other | — |  |  | — |  |  | 293 |  |  | (21,915 | ) |  | (3,733 | ) |  | 75 |  |  | (3,440 | ) |  | (21,840 | )
Benefits paid | (6,680 | ) |  | (6,420 | ) |  | (43,271 | ) |  | (36,861 | ) |  | (872 | ) |  | (878 | ) |  | (50,823 | ) |  | (44,159 | )
Impact of foreign currency | — |  |  | — |  |  | 20,117 |  |  | 21,707 |  |  | — |  |  | — |  |  | 20,117 |  |  | 21,707 |
Benefit obligation at end of year | $ | 138,147 |  |  | $ | 156,804 |  |  | $ | 814,200 |  |  | $ | 798,657 |  |  | $ | 5,295 |  |  | $ | 11,267 |  |  | $ | 957,642 |  |  | $ | 966,728 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year | $ | 94,734 |  |  | $ | 87,904 |  |  | $ | 731,040 |  |  | $ | 665,126 |  |  | $ | — |  |  | $ | — |  |  | $ | 825,774 |  |  | $ | 753,030 |
Actual return on plan assets | 12,073 |  |  | 9,501 |  |  | 42,480 |  |  | 47,797 |  |  | — |  |  | — |  |  | 54,553 |  |  | 57,298 |
Employer contributions | 17,776 |  |  | 3,749 |  |  | 25,147 |  |  | 22,309 |  |  | 723 |  |  | 803 |  |  | 43,646 |  |  | 26,861 |
Plan participants’ contributions | — |  |  | — |  |  | 13,255 |  |  | 12,315 |  |  | 149 |  |  | 75 |  |  | 13,404 |  |  | 12,390 |
Benefits paid | (6,680 | ) |  | (6,420 | ) |  | (43,271 | ) |  | (36,861 | ) |  | (872 | ) |  | (878 | ) |  | (50,823 | ) |  | (44,159 | )
Impact of foreign currency and other | — |  |  | — |  |  | 17,881 |  |  | 20,354 |  |  | — |  |  | — |  |  | 17,881 |  |  | 20,354 |
Fair value of plan assets at end of year | $ | 117,903 |  |  | $ | 94,734 |  |  | $ | 786,532 |  |  | $ | 731,040 |  |  | $ | — |  |  | $ | — |  |  | 904,435 |  |  | 825,774 |
Funded status | $ | (20,244 | ) |  | $ | (62,070 | ) |  | $ | (27,668 | ) |  | $ | (67,617 | ) |  | $ | (5,295 | ) |  | $ | (11,267 | ) |  | $ | (53,207 | ) |  | $ | (140,954 | )
Schedule of Amounts Recognized in Balance Sheet |
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits |  | Total
| 2013 |  | 2012 |  | 2013 |  | 2012 |  | 2013 |  | 2012 |  | 2013 |  | 2012
Other non-current assets | $ | — |  |  | $ | — |  |  | $ | 105,132 |  |  | $ | 64,183 |  |  | $ | — |  |  | $ | — |  |  | $ | 105,132 |  |  | $ | 64,183 |
Pension and other post-retirement liabilities | (20,244 | ) |  | (62,070 | ) |  | (132,800 | ) |  | (131,800 | ) |  | (5,295 | ) |  | (11,267 | ) |  | (158,339 | ) |  | (205,137 | )
Accumulated other comprehensive loss (income) | 59,013 |  |  | 89,940 |  |  | 110,965 |  |  | 130,776 |  |  | (15,910 | ) |  | (10,941 | ) |  | 154,068 |  |  | 209,775 |
Total | $ | 38,769 |  |  | $ | 27,870 |  |  | $ | 83,297 |  |  | $ | 63,159 |  |  | $ | (21,205 | ) |  | $ | (22,208 | ) |  | $ | 100,861 |  |  | $ | 68,821 |
Schedule of Net Periodic Benefit Cost Not yet Recognized |
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits |  | Total |  | Total, After Tax
Plan amendments and prior service cost | $ | — |  |  | $ | (25,137 | ) |  | $ | (3,598 | ) |  | $ | (28,735 | ) |  | $ | (22,413 | )
Actuarial losses (gains) | 59,013 |  |  | 136,102 |  |  | (12,312 | ) |  | 182,803 |  |  | 132,931 |
Total | $ | 59,013 |  |  | $ | 110,965 |  |  | $ | (15,910 | ) |  | $ | 154,068 |  |  | $ | 110,518 |
Schedule of Changes in Accumulated Postemployment Benefit Obligations |
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits |  | Total |  | Total, After Tax
Net actuarial losses (gains) | $ | (23,145 | ) |  | $ | (18,795 | ) |  | $ | (1,988 | ) |  | $ | (43,928 | ) |  | $ | (30,381 | )
Plan amendments and prior service cost, net | — |  |  | 17 |  |  | (3,882 | ) |  | (3,865 | ) |  | (2,371 | )
Amortization of: |  |  |  |  |  |  |  |  |
Actuarial (losses) gains | (7,782 | ) |  | (7,398 | ) |  | 988 |  |  | (14,192 | ) |  | (9,821 | )
Plan amendments and prior service cost | — |  |  | 3,853 |  |  | (87 | ) |  | 3,766 |  |  | 3,046 |
Impact of foreign currency | — |  |  | 2,512 |  |  | — |  |  | 2,512 |  |  | 2,010 |
Total | $ | (30,927 | ) |  | $ | (19,811 | ) |  | $ | (4,969 | ) |  | $ | (55,707 | ) |  | $ | (37,517 | )
Schedule of Assumptions Used in Computing Benefit Obligation |
| U.S. |  | Non-U.S.
| 2013 |  | 2012 |  | 2011 |  | 2013 |  | 2012 |  | 2011
Discount rate | 4.75 | % |  | 3.75 | % |  | 4.25 | % |  | 2.73 | % |  | 2.50 | % |  | 3.10 | %
Compensation increase rate | n/a |  |  | n/a |  |  | n/a |  |  | 1.61 | % |  | 1.60 | % |  | 1.75 | %
Expected long-term rate of return on plan assets | 7.50 | % |  | 7.75 | % |  | 8.00 | % |  | 4.87 | % |  | 4.89 | % |  | 4.80 | %
Schedule of Assumptions Used in Computing Pension Cost |
| U.S. |  | Non-U.S.
| 2013 |  | 2012 |  | 2011 |  | 2013 |  | 2012 |  | 2011
Discount rate | 3.75 | % |  | 4.25 | % |  | 5.25 | % |  | 2.50 | % |  | 3.10 | % |  | 3.60 | %
Compensation increase rate | n/a |  |  | n/a |  |  | n/a |  |  | 1.60 | % |  | 1.75 | % |  | 2.20 | %
Expected long-term rate of return on plan assets | 7.75 | % |  | 8.00 | % |  | 8.00 | % |  | 4.89 | % |  | 4.80 | % |  | 4.94 | %
Schedule of Net Pension Costs |
| U.S. |  | Non-U.S.
| 2013 |  | 2012 |  | 2011 |  | 2013 |  | 2012 |  | 2011
Service cost, net | $ | 494 |  |  | $ | 455 |  |  | $ | 331 |  |  | $ | 17,386 |  |  | $ | 15,011 |  |  | $ | 13,699 |
Interest cost on projected benefit obligations | 5,755 |  |  | 6,093 |  |  | 6,422 |  |  | 19,566 |  |  | 22,104 |  |  | 24,637 |
Expected return on plan assets | (7,154 | ) |  | (6,965 | ) |  | (7,499 | ) |  | (35,048 | ) |  | (32,989 | ) |  | (34,325 | )
Recognition of actuarial losses/(gains) and prior service costs | 7,782 |  |  | 7,664 |  |  | 5,103 |  |  | 3,545 |  |  | 210 |  |  | (339 | )
Net periodic pension cost | $ | 6,877 |  |  | $ | 7,247 |  |  | $ | 4,357 |  |  | $ | 5,449 |  |  | $ | 4,336 |  |  | $ | 3,672 |
Schedule of Net Postretirement Costs |
| 2013 |  | 2012 |  | 2011
Service cost | $ | 216 |  |  | $ | 333 |  |  | $ | 304 |
Interest cost on projected benefit obligations | 405 |  |  | 539 |  |  | 731 |
Net amortization and deferral | (901 | ) |  | (753 | ) |  | (692 | )
Net periodic post-retirement benefit (credit)/cost | $ | (280 | ) |  | $ | 119 |  |  | $ | 343 |
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year |
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits |  | Total
Plan amendments and prior service costs | $ | — |  |  | $ | (3,941 | ) |  | $ | (779 | ) |  | $ | (4,720 | )
Actuarial losses (gains) | 4,845 |  |  | 4,246 |  |  | (1,436 | ) |  | 7,655 |
Total | $ | 4,845 |  |  | $ | 305 |  |  | $ | (2,215 | ) |  | $ | 2,935 |
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates |
| One-Percentage-Point Increase |  | One-Percentage-Point Decrease
Effect on total of service and interest cost components | $ | 56 |  |  | $ | (50 | )
Effect on post-retirement benefit obligation | $ | 208 |  |  | $ | (190 | )
Schedule of Allocation of Plan Assets |
| December 31, 2013 |  | December 31, 2012
| Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Observable Inputs for Identical Assets (Level 2) |  | Unobservable Inputs (Level 3) |  | Total |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Observable Inputs for Identical Assets (Level 2) |  | Unobservable Inputs (Level 3) |  | Total
Asset Category: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and Cash Equivalents | $ | 129,932 |  |  | $ | — |  |  | $ | — |  |  | $ | 129,932 |  |  | $ | 141,020 |  |  | $ | — |  |  | $ | — |  |  | $ | 141,020 |
Equity Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mettler-Toledo Stock | 3,425 |  |  | — |  |  | — |  |  | 3,425 |  |  | 3,284 |  |  | — |  |  | — |  |  | 3,284 |
Equity Mutual Funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S.(1) | 5,960 |  |  | 27,652 |  |  | — |  |  | 33,612 |  |  | 25,880 |  |  | 21,268 |  |  | — |  |  | 47,148 |
International(2) | 44,149 |  |  | 54,120 |  |  | — |  |  | 98,269 |  |  | 37,982 |  |  | 46,312 |  |  | — |  |  | 84,294 |
Emerging Markets(3) | 78,392 |  |  | 5,773 |  |  | — |  |  | 84,165 |  |  | 36,449 |  |  | 5,704 |  |  | — |  |  | 42,153 |
Fixed Income Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate/Government | 129,155 |  |  | — |  |  | — |  |  | 129,155 |  |  | 66,331 |  |  | — |  |  | — |  |  | 66,331 |
Bonds(4) |  |  |  |  |  |  |
Fixed Income Mutual Funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance Contracts(5) | — |  |  | 24,633 |  |  | 1,475 |  |  | 26,108 |  |  | — |  |  | 23,015 |  |  | 1,726 |  |  | 24,741 |
Core Bond(6) | 146,857 |  |  | 36,327 |  |  | — |  |  | 183,184 |  |  | 147,853 |  |  | 35,980 |  |  | — |  |  | 183,833 |
Real Asset Mutual Funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate(7) | 66,431 |  |  | — |  |  | — |  |  | 66,431 |  |  | 62,172 |  |  | — |  |  | — |  |  | 62,172 |
Commodities(8) | 23,293 |  |  | 3,323 |  |  | 23,136 |  |  | 49,752 |  |  | 30,976 |  |  | 3,775 |  |  | 22,986 |  |  | 57,737 |
Other Types of Investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Global Allocation Funds(9) | 12,002 |  |  | 11,088 |  |  | — |  |  | 23,090 |  |  | 29,504 |  |  | 8,572 |  |  | — |  |  | 38,076 |
Multi-Strategy Fund of | — |  |  | — |  |  | 77,312 |  |  | 77,312 |  |  | — |  |  | — |  |  | 74,985 |  |  | 74,985 |
Hedge Funds(10) |  |  |  |  |  |  |
| $ | 639,596 |  |  | $ | 162,916 |  |  | $ | 101,923 |  |  | $ | 904,435 |  |  | $ | 581,451 |  |  | $ | 144,626 |  |  | $ | 99,697 |  |  | $ | 825,774 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation |
| Multi- Strategy Fund of Hedge Funds |  | Commodities |  | Insurance Contract |  | Convertible Preferred Equity Certificates |  | Total
Balance at December 31, 2011 | $ | 78,650 |  |  | $ | 21,816 |  |  | $ | 1,661 |  |  | $ | 14,366 |  |  | $ | 116,493 |
Actual return on plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related to assets held at end of year | 1,099 |  |  | 533 |  |  | 31 |  |  | — |  |  | 1,663 |
Related to assets sold during the year | 317 |  |  | — |  |  | 3 |  |  | 2,240 |  |  | 2,560 |
Purchases | 8,638 |  |  | — |  |  | 161 |  |  | — |  |  | 8,799 |
Sales | (15,418 | ) |  | — |  |  | (165 | ) |  | (16,636 | ) |  | (32,219 | )
Impact of foreign currency | 1,699 |  |  | 637 |  |  | 35 |  |  | 30 |  |  | 2,401 |
Balance at December 31, 2012 | $ | 74,985 |  |  | $ | 22,986 |  |  | $ | 1,726 |  |  | $ | — |  |  | $ | 99,697 |
Actual return on plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related to assets held at end of year | 1,420 |  |  | (449 | ) |  | 69 |  |  | — |  |  | 1,040 |
Purchases | 11,792 |  |  | — |  |  | 127 |  |  | — |  |  | 11,919 |
Sales | (12,691 | ) |  | — |  |  | (519 | ) |  | — |  |  | (13,210 | )
Impact of foreign currency | 1,806 |  |  | 599 |  |  | 72 |  |  | — |  |  | 2,477 |
Balance at December 31, 2013 | $ | 77,312 |  |  | $ | 23,136 |  |  | $ | 1,475 |  |  | $ | — |  |  | $ | 101,923 |
Schedule of Expected Benefit Payments |
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits Net of Subsidy |  | Total
2014 | $ | 7,082 |  |  | $ | 43,703 |  |  | $ | 508 |  |  | $ | 51,293 |
2015 | 7,268 |  |  | 42,903 |  |  | 510 |  |  | 50,681 |
2016 | 7,489 |  |  | 44,259 |  |  | 491 |  |  | 52,239 |
2017 | 7,842 |  |  | 45,016 |  |  | 493 |  |  | 53,351 |
2018 | 8,129 |  |  | 44,480 |  |  | 499 |  |  | 53,108 |
2019-2023 | 44,543 |  |  | 224,801 |  |  | 2,516 |  |  | 271,860 |

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- Definition Tabular disclosure of the change in the accumulated postemployment benefit obligation from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + 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) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28361610&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 3 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=32704760&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2439-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2410-114920 + Details
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- Definition Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits. + 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 (m) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + 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 (f) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income or loss that have not yet been recognized as components of net periodic benefit cost, such as the net gain (loss), net prior service cost or credit, and net transition asset or 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 (j) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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