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

Finite-Lived Intangible Asset, Not Amortized, Period Of Time

No definition available.

Name:	mmm_FiniteLivedIntangibleAssetNotAmortizedPeriodOfTime
Namespace Prefix:	mmm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant