XML 72 R56.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Significant Accounting Policies - Internal-use Software (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021
Minimum |
Research and Development Assets Acquired Other than Through Business Combination [Line Items] |
Capitalized internal-use software amortization period (in years) | 3 years
Maximum |
Research and Development Assets Acquired Other than Through Business Combination [Line Items] |
Capitalized internal-use software amortization period (in years) | 7 years

X
- Definition The capitalized internal-use software amortization period. + References No definition available. + Details
Name: | mmm_CapitalizedComputerSoftwareAmortizationPeriod
Namespace Prefix: | mmm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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_ResearchAndDevelopmentAssetsAcquiredOtherThanThroughBusinessCombinationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |