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Benefit Plans | 12 Months Ended
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Dec. 31, 2020
Defined Benefit Plan [Abstract] |
Benefits Plans Disclosure | BENEFIT PLANS The Company maintains a number of retirement and other post-retirement employee benefit plans. Certain subsidiaries sponsor defined contribution plans. Benefits are determined and funded annually based upon the terms of the plans. Amounts recognized as cost under these plans amounted to $19.3 million, $18.8 million, and $18.9 million for the years ended December 31, 2020, 2019, and 2018, respectively. Certain subsidiaries sponsor defined benefit plans. Benefits are provided to employees primarily based upon years of service and employees’ compensation for certain periods during the last years of employment. Prior to 2002, the Company’s U.S. operations also provided post-retirement medical benefits to their employees. Contributions for medical benefits are related to employee years of service. The following tables set forth the change in benefit obligation, the change in plan assets, the funded status, and amounts recognized in the consolidated financial statements for the Company’s defined benefit plans and post-retirement plan at December 31, 2020 and 2019:
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits |  | Total
| 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of year | $ | 142,450 |  |  | $ | 130,202 |  |  | $ | 961,263 |  |  | $ | 864,095 |  |  | $ | 1,295 |  |  | $ | 2,186 |  |  | $ | 1,105,008 |  |  | $ | 996,483 |
Service cost, gross | 1,304 |  |  | 1,063 |  |  | 33,995 |  |  | 30,665 |  |  | — |  |  | — |  |  | 35,299 |  |  | 31,728 |
Interest cost | 3,556 |  |  | 4,585 |  |  | 4,778 |  |  | 10,192 |  |  | 25 |  |  | 64 |  |  | 8,359 |  |  | 14,841 |
Actuarial losses (gains) | 10,733 |  |  | 14,449 |  |  | 43,508 |  |  | 84,262 |  |  | (70) |  |  | (129) |  |  | 54,171 |  |  | 98,582 |
Plan amendments and other | — |  |  | — |  |  | 112 |  |  | — |  |  | — |  |  | (576) |  |  | 112 |  |  | (576) |
Benefits paid | (8,096) |  |  | (7,849) |  |  | (39,412) |  |  | (38,181) |  |  | (220) |  |  | (250) |  |  | (47,728) |  |  | (46,280) |
Impact of foreign currency | — |  |  | — |  |  | 87,567 |  |  | 10,230 |  |  | — |  |  | — |  |  | 87,567 |  |  | 10,230 |
Benefit obligation at end of year | $ | 149,947 |  |  | $ | 142,450 |  |  | $ | 1,091,811 |  |  | $ | 961,263 |  |  | $ | 1,030 |  |  | $ | 1,295 |  |  | $ | 1,242,788 |  |  | $ | 1,105,008 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year | $ | 102,812 |  |  | $ | 95,541 |  |  | $ | 861,962 |  |  | $ | 767,410 |  |  | $ | — |  |  | $ | — |  |  | $ | 964,774 |  |  | $ | 862,951 |
Actual return on plan assets | 9,223 |  |  | 15,037 |  |  | 39,535 |  |  | 76,732 |  |  | — |  |  | — |  |  | 48,758 |  |  | 91,769 |
Employer contributions | 5,523 |  |  | 83 |  |  | 26,249 |  |  | 25,323 |  |  | 220 |  |  | 250 |  |  | 31,992 |  |  | 25,656 |
Plan participants’ contributions | — |  |  | — |  |  | 15,681 |  |  | 15,130 |  |  | — |  |  | — |  |  | 15,681 |  |  | 15,130 |
Benefits paid | (8,096) |  |  | (7,849) |  |  | (39,412) |  |  | (38,181) |  |  | (220) |  |  | (250) |  |  | (47,728) |  |  | (46,280) |
Impact of foreign currency and other | — |  |  | — |  |  | 80,307 |  |  | 15,548 |  |  | — |  |  | — |  |  | 80,307 |  |  | 15,548 |
Fair value of plan assets at end of year | $ | 109,462 |  |  | $ | 102,812 |  |  | $ | 984,322 |  |  | $ | 861,962 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,093,784 |  |  | $ | 964,774 |
Funded status | $ | (40,485) |  |  | $ | (39,638) |  |  | $ | (107,489) |  |  | $ | (99,301) |  |  | $ | (1,030) |  |  | $ | (1,295) |  |  | $ | (149,004) |  |  | $ | (140,234) |
The change in the benefit obligation for 2020 and 2019 includes an actuarial loss primarily related to a decline in discount rates, offset in part by plan asset returns. The accumulated benefit obligations at December 31, 2020 and 2019 were $149.9 million and $142.5 million, respectively, for the U.S. defined benefit pension plan and $920.3 million and $812.0 million, respectively, for all non-U.S. plans. Certain of the plans included within non-U.S. pension benefits have accumulated benefit obligations which exceed the fair value of plan assets. The projected benefit obligation, the accumulated benefit obligation, and fair value of assets of these plans as of December 31, 2020 were $216.7 million, $205.3 million, and $57.4 million, respectively. The projected benefit obligation, the accumulated benefit obligation, and fair value of assets of these plans as of December 31, 2019 were $195.3 million, $184.4 million, and $51.5 million, respectively. Amounts recognized in the consolidated balance sheets consist of:
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits |  | Total
| 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Other non-current assets | $ | — |  |  | $ | — |  |  | $ | 51,619 |  |  | $ | 44,536 |  |  | $ | — |  |  | $ | — |  |  | $ | 51,619 |  |  | $ | 44,536 |
Accrued and other liabilities | (133) |  |  | (126) |  |  | (5,549) |  |  | (5,023) |  |  | (153) |  |  | (239) |  |  | (5,835) |  |  | (5,388) |
Pension and other post-retirement liabilities | (40,353) |  |  | (39,512) |  |  | (153,559) |  |  | (138,813) |  |  | (877) |  |  | (1,057) |  |  | (194,789) |  |  | (179,382) |
Accumulated other comprehensive loss (income) | 69,296 |  |  | 64,269 |  |  | 332,280 |  |  | 286,370 |  |  | (891) |  |  | (924) |  |  | 400,685 |  |  | 349,715 |
Total | $ | 28,810 |  |  | $ | 24,631 |  |  | $ | 224,791 |  |  | $ | 187,070 |  |  | $ | (1,921) |  |  | $ | (2,220) |  |  | $ | 251,680 |  |  | $ | 209,481 |
The following amounts have been recognized in accumulated other comprehensive income (loss), before taxes, at December 31, 2020 and have not yet been recognized as a component of net periodic pension cost:
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits |  | Total |  | Total, After Tax
Plan amendments and prior service cost | $ | — |  |  | $ | (9,857) |  |  | $ | (501) |  |  | $ | (10,358) |  |  | $ | (8,262) |
Actuarial losses (gains) | 69,296 |  |  | 342,137 |  |  | (390) |  |  | 411,043 |  |  | 322,947 |
Total | $ | 69,296 |  |  | $ | 332,280 |  |  | $ | (891) |  |  | $ | 400,685 |  |  | $ | 314,685 |
The following changes in plan assets and benefit obligations were recognized in other comprehensive income (loss), before taxes, for the year ended December 31, 2020:
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits |  | Total |  | Total, After Tax
Net actuarial losses (gains) | $ | 7,605 |  |  | $ | 37,041 |  |  | $ | (70) |  |  | $ | 44,576 |  |  | $ | 35,662 |
Plan amendment | — |  |  | 112 |  |  | — |  |  | 112 |  |  | 93 |
Amortization of: |  |  |  |  |  |  |  |  |
Actuarial (losses) gains | (2,578) |  |  | (23,251) |  |  | 28 |  |  | (25,801) |  |  | (20,370) |
Plan amendments and prior service cost | — |  |  | 7,117 |  |  | 75 |  |  | 7,192 |  |  | 5,823 |
Impact of foreign currency | — |  |  | 24,891 |  |  | — |  |  | 24,891 |  |  | 19,701 |
Total | $ | 5,027 |  |  | $ | 45,910 |  |  | $ | 33 |  |  | $ | 50,970 |  |  | $ | 40,909 |
The assumed discount rates and rates of increase in future compensation levels used in calculating the projected benefit obligations vary according to the economic conditions of the country in which the retirement plans are situated. The weighted average rates used for the purposes of the Company’s plans are as follows:
| U.S. |  | Non-U.S.
| 2020 |  | 2019 |  | 2020 |  | 2019
Discount rate | 2.22 | % |  | 3.03 | % |  | 0.32 | % |  | 0.51 | %
Compensation increase rate | n/a |  | n/a |  | 0.86 | % |  | 0.86 | %
Expected long-term rate of return on plan assets | 5.75 | % |  | 6.25 | % |  | 3.73 | % |  | 3.76 | %
Interest crediting risk | n/a |  | n/a |  | 0.50 | % |  | 0.80 | %
The assumed discount rates, rates of increase in future compensation levels, and the long-term rate of return used in calculating the net periodic pension cost vary according to the economic conditions of the country in which the retirement plans are situated. The weighted average rates used for the purposes of the Company’s plans are as follows:
| U.S. |  | Non-U.S.
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Discount rate | 3.03 | % |  | 4.11 | % |  | 3.49 | % |  | 0.51 | % |  | 1.22 | % |  | 0.97 | %
Compensation increase rate | n/a |  | n/a |  | n/a |  | 0.86 | % |  | 0.87 | % |  | 0.87 | %
Expected long-term rate of return on plan assets | 6.25 | % |  | 6.50 | % |  | 6.50 | % |  | 3.76 | % |  | 3.84 | % |  | 3.86 | %
Net periodic pension cost and net periodic post-retirement benefit for the defined benefit plans and U.S. post-retirement plan include the following components for the years ended December 31:
| U.S. |  | Non-U.S. |  | Other Benefits |  | Total
2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Service cost, net | $ | 1,304 |  |  | $ | 1,063 |  |  | $ | 1,090 |  |  | $ | 18,314 |  |  | $ | 15,534 |  |  | $ | 15,545 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 19,618 |  |  | $ | 16,597 |  |  | $ | 16,635 |
Interest cost on projected benefit obligations | 3,556 |  |  | 4,585 |  |  | 4,242 |  |  | 4,778 |  |  | 10,192 |  |  | 8,630 |  |  | 25 |  |  | 64 |  |  | 66 |  |  | 8,359 |  |  | 14,841 |  |  | 12,938 |
Expected return on plan assets | (6,094) |  |  | (5,887) |  |  | (6,929) |  |  | (33,067) |  |  | (29,162) |  |  | (31,005) |  |  | — |  |  | — |  |  | — |  |  | (39,161) |  |  | (35,049) |  |  | (37,934) |
Recognition of actuarial losses/(gains) and prior service costs | 2,578 |  |  | 2,374 |  |  | 5,804 |  |  | 16,134 |  |  | 13,784 |  |  | 14,575 |  |  | (103) |  |  | (691) |  |  | (1,623) |  |  | 18,609 |  |  | 15,467 |  |  | 18,756 |
Net periodic pension cost / (benefit) | $ | 1,344 |  |  | $ | 2,135 |  |  | $ | 4,207 |  |  | $ | 6,159 |  |  | $ | 10,348 |  |  | $ | 7,745 |  |  | $ | (78) |  |  | $ | (627) |  |  | $ | (1,557) |  |  | $ | 7,425 |  |  | $ | 11,856 |  |  | $ | 10,395 |
The projected post-retirement benefit obligation was principally determined using discount rates of 1.47% in 2020 and 2.54% in 2019. Net periodic post-retirement benefit cost was principally determined using discount rates of 2.54% in 2020, 3.75% in 2019, and 3.15% in 2018. The health care cost trend rate was 6.0% in 2020, 6.2% in 2019, and 6.4% in 2018, decreasing to 4.50% in 2029. The Company’s overall asset investment strategy is to achieve long-term growth while minimizing volatility by widely diversifying among asset types and strategies. Target asset allocations and investment return criteria are established by the pension committee or designated officers of each plan. Target asset allocation ranges for the U.S. pension plan include 40-60% in equity securities, 23-33% in fixed income securities, and 15-25% in other types of investments. International plan assets relate primarily to the Company’s Swiss plan with target allocations of 24-45% in equities, 35-55% in fixed income securities, and 15-25% in other types of investments. Actual results are monitored against targets and the trustees are required to report to the members of each plan, including an analysis of investment performance on an annual basis at a minimum. Day-to-day asset management is typically performed by third-party asset managers, reporting to the pension committees or designated officers. The long-term rate of return on plan asset assumptions used to determine pension expense under U.S. GAAP is generally based on estimated future returns for the target investment mix determined by the trustees as well as historical investment performance. The following table presents the fair value measurement of the Company’s plan assets by hierarchy level:
| December 31, 2020 |  | December 31, 2019
| 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 | $ | 166,614 |  |  | $ | — |  |  | $ | — |  |  | $ | 166,614 |  |  | $ | 104,144 |  |  | $ | — |  |  | $ | — |  |  | $ | 104,144 |
Equity Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mettler-Toledo Stock | 3,767 |  |  | — |  |  | — |  |  | 3,767 |  |  | 2,620 |  |  | — |  |  | — |  |  | 2,620 |
Equity Mutual Funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S.(1) | 7,467 |  |  | 30,460 |  |  | — |  |  | 37,927 |  |  | 7,245 |  |  | 29,885 |  |  | — |  |  | 37,130 |
International(2) | 83,309 |  |  | 41,027 |  |  | — |  |  | 124,336 |  |  | 62,569 |  |  | 53,188 |  |  | — |  |  | 115,757 |
Emerging Markets(3) | 131,103 |  |  | 966 |  |  | — |  |  | 132,069 |  |  | 110,972 |  |  | 822 |  |  | — |  |  | 111,794 |
Fixed Income Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate/Government Bonds(4) | 92,085 |  |  | — |  |  | — |  |  | 92,085 |  |  | 84,020 |  |  | — |  |  | — |  |  | 84,020 |
Fixed Income Mutual Funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance Contracts(5) | — |  |  | 43,055 |  |  | 1,793 |  |  | 44,848 |  |  | — |  |  | 37,459 |  |  | 1,486 |  |  | 38,945 |
Core Bond(6) | 72,061 |  |  | 64,111 |  |  | — |  |  | 136,172 |  |  | 116,629 |  |  | 61,960 |  |  | — |  |  | 178,589 |
Real Asset Mutual Funds: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate(7) | 117,089 |  |  | 15,864 |  |  | — |  |  | 132,953 |  |  | 95,580 |  |  | 14,185 |  |  | — |  |  | 109,765 |
Commodities(8) | 53,088 |  |  | — |  |  | — |  |  | 53,088 |  |  | 47,697 |  |  | — |  |  | — |  |  | 47,697 |
Other Types of Investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Securities (9) | 43,060 |  |  | — |  |  | — |  |  | 43,060 |  |  | 39,275 |  |  | — |  |  | — |  |  | 39,275 |
Global Allocation Funds(10) | 12,359 |  |  | — |  |  | — |  |  | 12,359 |  |  | 12,269 |  |  | — |  |  | — |  |  | 12,269 |
Insurance Linked Securities(11) | 19,038 |  | — |  |  | — |  |  | 19,038 |  |  | 18,434 |  |  | — |  |  | — |  |  | 18,434 |
Total assets in fair value hierarchy | $ | 801,040 |  |  | $ | 195,483 |  |  | $ | 1,793 |  |  | $ | 998,316 |  |  | $ | 701,454 |  |  | $ | 197,499 |  |  | $ | 1,486 |  |  | $ | 900,439 |
Investments measured at net asset value: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
International(12) |  |  |  |  |  |  | 2,930 |  |  |  |  |  |  |  | 3,288 |
Emerging Markets (12) |  |  |  |  |  |  | 7,262 |  |  |  |  |  |  |  | 6,650
Multi-Strategy Fund of Hedge Funds (12) |  |  |  |  |  |  | 85,276 |  |  |  |  |  |  |  | 54,397
Total pension assets at fair value |  |  |  |  |  |  | $ | 1,093,784 |  |  |  |  |  |  |  |  | $ | 964,774 |
_______________________________________ (1)Represents primarily large capitalization equity mutual funds tracking the S&P 500 Index. (2)Represents all capitalization core and value equity mutual funds located primarily in Switzerland, the United Kingdom, and Canada. (3)Represents core and growth mutual funds and funds of mutual funds invested in emerging markets primarily in Eastern Europe, Latin America, and Asia. (4)Represents investments in high-grade corporate and government bonds located in Switzerland and the European Union. (5)Represents fixed and variable rate annuity contracts provided by insurance companies. (6)Represents fixed income mutual funds invested in the U.S., the United Kingdom, Switzerland, and European government bonds, high-grade corporate bonds, mortgage-backed securities, and collateralized mortgage obligations. (7)Represents mutual funds invested in real estate located primarily in Switzerland. (8)Represents commodity funds invested across a broad range of sectors. (9)Represents a loan to a wholly owned subsidiary of the Company. See Note 10 for additional disclosure. (10)Represents mutual funds invested globally in both equities and fixed income securities. (11)Represents a broadly diversified portfolio of assets that carry exposure to insurance risks, particularly insurance linked securities. (12)Investments that are measured using the net asset value (NAV) per share practical expedient have not been categorized in the fair value hierarchy. The amounts presented above are intended to permit reconciliation of the fair value hierarchy to the fair value of total plan assets in order to determine the amounts included in the consolidated balance sheet. The fair value of the Company’s stock and corporate and government bonds are valued at the year-end closing price as reported on the securities exchange on which they are traded. Mutual funds are valued at the exchange-listed year-end closing price or at the net asset value of shares held by the fund at the end of the year. Insurance contracts are valued by discounting the related cash flows using a current year-end market rate or at cash surrender value, which is presumed to equal fair value. Funds of hedge funds are valued at the net asset value of shares held by the fund at the end of the year. The following table presents a roll-forward of activity for the years ended December 31, 2020 and 2019 for Level 3 asset categories:
| Insurance Contracts
Balance at December 31, 2018 | $ | 1,461 |
Actual return on plan assets related to assets held at end of year | 14 |
Sales | (54) |
Purchases | 83 |
Impact of foreign currency | (18) |
Balance at December 31, 2019 | $ | 1,486 |
Actual return on plan assets related to assets held at end of year | 22 |
Purchases | 99 |
Impact of foreign currency | 186 |
Balance at December 31, 2020 | $ | 1,793 |
There were no transfers between any asset levels during the years ended December 31, 2020 and 2019. The following benefit payments, which reflect expected future service as appropriate, are expected to be paid:
| U.S. Pension Benefits |  | Non-U.S. Pension Benefits |  | Other Benefits Net of Subsidy |  | Total
2021 | $ | 8,382 |  |  | $ | 49,784 |  |  | $ | 153 |  |  | $ | 58,319 |
2022 | 8,507 |  |  | 48,687 |  |  | 128 |  |  | 57,322 |
2023 | 8,666 |  |  | 49,242 |  |  | 110 |  |  | 58,018 |
2024 | 8,750 |  |  | 50,370 |  |  | 98 |  |  | 59,218 |
2025 | 8,778 |  |  | 50,415 |  |  | 87 |  |  | 59,280 |
2026-2030 | 42,808 |  |  | 246,920 |  |  | 303 |  |  | 290,031 |
In 2020, the Company expects to make employer pension contributions of approximately $27.9 million to its non-U.S. pension plan and employer contributions of approximately $0.2 million to its U.S. post-retirement medical plan.

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Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration