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Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2022
Defined Benefit Plan [Abstract]  
Schedule of Defined Benefit Plans Disclosures
 U.S. Pension BenefitsNon-U.S. Pension BenefitsOther BenefitsTotal
 20222021202220212022202120222021
Change in benefit obligation:      
Benefit obligation at beginning of year
$141,906 $149,947 $1,027,333 $1,091,811 $875 $1,030 $1,170,114 $1,242,788 
Service cost, gross1,665 1,498 36,640 35,675 — — 38,305 37,173 
Interest cost2,696 2,194 5,927 3,347 12 8 8,635 5,549 
Actuarial losses (gains)(27,541)(3,399)(219,304)1,904 206 37 (246,639)(1,458)
Plan amendments and other— — 13 (23,196)— — 13 (23,196)
Benefits paid(8,433)(8,334)(34,949)(39,911)(423)(200)(43,805)(48,445)
Impact of foreign currency— — (30,365)(42,297)— — (30,365)(42,297)
Benefit obligation at end of year
$110,293 $141,906 $785,295 $1,027,333 $670 $875 $896,258 $1,170,114 
Change in plan assets:      
Fair value of plan assets at beginning of year
$113,523 $109,462 $1,008,261 $984,322 $— $— $1,121,784 $1,093,784 
Actual return on plan assets(17,863)12,307 (96,866)52,922 — — (114,729)65,229 
Employer contributions114 88 24,441 27,088 423 200 24,978 27,376 
Plan participants’ contributions
— — 17,600 16,102 — — 17,600 16,102 
Benefits paid(8,433)(8,334)(34,949)(39,911)(423)(200)(43,805)(48,445)
Impact of foreign currency— — (23,622)(32,262)— — (23,622)(32,262)
Fair value of plan assets at end of year
$87,341 $113,523 $894,865 $1,008,261 $— $— $982,206 $1,121,784 
Funded status$(22,952)$(28,383)$109,570 $(19,072)$(670)$(875)$85,948 $(48,330)
Schedule of Amounts Recognized in Balance Sheet
 U.S. Pension BenefitsNon-U.S. Pension BenefitsOther BenefitsTotal
 20222021202220212022202120222021
Other non-current assets$— $— $202,368 $122,049 $— $— $202,368 $122,049 
Accrued and other liabilities(131)(136)(4,986)(5,289)(115)(129)(5,232)(5,554)
Pension and other post-retirement liabilities
(22,821)(28,246)(90,342)(135,833)(555)(746)(113,718)(164,825)
Accumulated other comprehensive loss (income)
50,822 56,648 151,924 259,714 (430)(742)202,316 315,620 
Total$27,870 $28,266 $258,964 $240,641 $(1,100)$(1,617)$285,734 $267,290 
Schedule of Net Periodic Benefit Cost Not yet Recognized
U.S. Pension
Benefits		Non-U.S. Pension
Benefits		Other BenefitsTotalTotal, After Tax
2022202120222021202220212022202120222021
Plan amendments and prior service cost$— $— $(24,701)$(29,446)$(351)$(426)$(25,052)$(29,872)$(20,237)$(24,118)
Actuarial losses (gains)50,822 56,648 176,625 289,160 (79)(316)227,368 345,492 180,278 $272,118 
Total$50,822 $56,648 $151,924 $259,714 $(430)$(742)$202,316 $315,620 $160,041 $248,000 
Schedule of Changes in Accumulated Postemployment Benefit Obligations
U.S. Pension
Benefits		Non-U.S. Pension
Benefits		Other BenefitsTotalTotal, After Tax
Net actuarial losses (gains)$(3,489)$(86,130)$206 $(89,413)$(70,672)
Plan amendment— 13 — 13 9 
Amortization of:
Actuarial (losses) gains(2,337)(18,896)31 (21,202)(16,777)
Plan amendments and prior service cost— 4,231 75 4,306 3,499 
Impact of foreign currency— (7,008)— (7,008)(3,094)
Total$(5,826)$(107,790)$312 $(113,304)$(87,035)
Schedule of Assumptions Used in Computing Benefit Obligation
 U.S.Non-U.S.
 2022202120222021
Discount rate4.87 %2.57 %2.57 %0.40 %
Compensation increase raten/an/a0.87 %0.85 %
Expected long-term rate of return on plan assets6.75 %5.75 %3.84 %3.78 %
Interest crediting raten/an/a1.50 %1.00 %
Schedule of Assumptions Used in Computing Pension Cost
 U.S.Non-U.S.
 202220212020202220212020
Discount rate2.57 %2.22 %3.03 %0.40 %0.63 %0.51 %
Compensation increase raten/an/an/a0.85 %0.85 %0.86 %
Expected long-term rate of return on plan assets5.75 %5.75 %6.25 %3.78 %3.78 %3.76 %
Schedule of Net Benefit Costs [Table Text Block]
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 BenefitsTotal
202220212020202220212020202220212020202220212020
Service cost, net$1,665 $1,498 $1,304 $19,040 $19,558 $18,314 $— $— $— $20,705 $21,056 $19,618 
Interest cost on projected benefit obligations
2,696 2,194 3,556 5,927 3,347 4,778 12 8 25 8,635 5,549 8,359 
Expected return on plan assets(6,189)(5,974)(6,094)(36,308)(35,511)(33,067)— — — (42,497)(41,485)(39,161)
Recognition of actuarial losses/(gains) and prior service cost2,337 2,916 2,578 14,665 21,725 16,134 (106)(112)(103)16,896 24,529 18,609 
Net periodic pension cost/(benefit)$509 $634 $1,344 $3,324 $9,119 $6,159 $(94)$(104)$(78)$3,739 $9,649 $7,425 
Schedule of Allocation of Plan Assets
 December 31, 2022December 31, 2021
Quoted
Prices in
Active
Markets for
Identical
Assets
(Level 1)		Observable
Inputs for
Identical
Assets
(Level 2)		Unobservable
Inputs
(Level 3)		TotalQuoted
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$99,535 $— $— $99,535 $92,207 $— $— $92,207 
Equity Securities:        
Mettler-Toledo Stock3,107 — — 3,107 3,639 — — 3,639 
Equity Mutual Funds:        
U.S.(1)
5,753 24,133 — 29,886 8,197 43,287 — 51,484 
International(2)
89,247 9,496 — 98,743 100,197 23,022 — 123,219 
Emerging Markets(3)
127,506 — — 127,506 157,814 3,315 — 161,129 
Fixed Income Securities:        
Corporate/Government Bonds(4)
79,221 — — 79,221 87,772 — — 87,772 
Fixed Income Mutual Funds:       
Insurance Contracts(5)
— 25,126 1,775 26,901 — 38,555 1,787 40,342 
Core Bond(6)
73,315 62,956 — 136,271 107,394 71,608 — 179,002 
Real Asset Mutual Funds:        
Real Estate(7)
— 167,693 — 167,693 — 153,954 — 153,954 
Commodities(8)
49,603 — — 49,603 50,525 — — 50,525 
Other Types of Investments:        
Debt Securities (9)
41,099 — — 41,099 41,628 — — 41,628 
Global Allocation Funds(10)
4,370 — — 4,370 5,680 — — 5,680 
Multi-Strategy Fund of Hedge Funds (11)
— 17,702 — 17,702 — 16,103 — 16,103 
Insurance Linked Securities(12)
13,243— — 13,243 19,287 — — 19,287 
Total assets in fair value hierarchy
$585,999 $307,106 $1,775 $894,880 $674,340 $349,844 $1,787 $1,025,971 
Investments measured at net asset value:
International(13)
2,4093,568 
Emerging Markets (13)
5,9807,211
Multi-Strategy Fund of Hedge Funds (13)
78,93785,034
Total pension assets at fair value
$982,206 $1,121,784 
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Insurance
Contracts
Balance at December 31, 2020$1,793 
Actual return on plan assets related to assets held at end of year26 
Purchases70 
Impact of foreign currency(102)
Balance at December 31, 2021$1,787 
Actual return on plan assets related to assets held at end of year(1)
Purchases80 
Impact of foreign currency(91)
Balance at December 31, 2022$1,775 
Schedule of Expected Benefit Payments
U.S. Pension
Benefits		Non-U.S. Pension
Benefits		Other Benefits, Net of
Subsidy		Total
2023$8,737 $48,449 $115 $57,301 
20248,777 51,196 102 60,075 
20258,804 51,332 90 60,226 
20268,768 49,982 79 58,829 
20278,712 52,391 70 61,173 
2028-203241,633 257,800 235 299,668