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Pension and Postretirement Benefit Plans - Plan Amount Narrative (Details) - Qualified and Non-Pension Benefits | Dec. 31, 2021 country standardPlan
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Benefit Plan Information |
Company-sponsored retirement plans, minimum number of worldwide plans | standardPlan | 75
Company-sponsored retirement plans, number of countries | country | 28

X
- Definition The number of company-sponsored worldwide plans aggregated together for disclosures purposes. + References No definition available. + Details
Name: | mmm_DefinedBenefitPlanNumberOfPlansWorldwideMinimum
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition This element represents the number of countries in which company has company-sponsored plans. + References No definition available. + Details
Name: | mmm_NumberOfCountriesInWhichRetirementPlansSponsored
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |