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v3.25.2

Other Charges , Net Other Charges, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Other Income and Expenses [Abstract] |  |  |  |
Non-service pension costs (benefits) | $ 3.4 | $ 1.9 | $ 6.5 | $ 3.8

X
- Definition Represents the pension costs (benefits) excluding service costs. + References No definition available. + Details
Name: | mtd_NonServicePensionCostsBenefits
Namespace Prefix: | mtd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OtherIncomeAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration