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Goodwill and Intangible Assets - Narrative (Details) | Jun. 30, 2024
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Goodwill and Intangible Assets Disclosure [Abstract] |
Tradenames not amortized, period of existence | 60 years

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- Definition Finite-Lived Intangible Asset, Not Amortized, Period Of Time + References No definition available. + Details
Name: | mmm_FiniteLivedIntangibleAssetNotAmortizedPeriodOfTime
Namespace Prefix: | mmm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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