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Commitments and Contingencies - Environmental (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended | 7 Months Ended
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Jul. 31, 2024 case | Mar. 31, 2024 plaintiff | Feb. 29, 2024 lawsuit | Jan. 31, 2024 lawsuit | Dec. 31, 2023 plaintiff case | Oct. 31, 2023 lawsuit | Aug. 31, 2023 lawsuit | May 31, 2023 EUR (€) party action | Mar. 31, 2023 party | Dec. 31, 2022 action | Jul. 31, 2022 EUR (€) | Jun. 30, 2020 lawsuit | Jun. 30, 2019 lawsuit | May 31, 2019 lawsuit | Mar. 31, 2019 facility lawsuit | Jul. 31, 2018 USD ($) defendant chemical facility mi | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) lawsuit case perfluorinated_material party | Jun. 30, 2022 USD ($) | Jun. 30, 2024 USD ($) lawsuit plaintiff party | Jun. 30, 2024 USD ($) lawsuit case party | Jun. 30, 2024 USD ($) lawsuit injury party
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of actions taken from lawsuits | action |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Increase in liabilities, gross |  |  |  |  |  |  |  |  |  |  | € 571,000,000 |  |  |  |  |  |  |  | $ 500,000,000 |  |  |
Belgian Civil Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits pending | party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17 |  | 17 | 17 | 17
Number of cases settled | action |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement amount paid | € |  |  |  |  |  |  |  | € 500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of family members awarded | party |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of named claimants | plaintiff |  |  |  |  | 1,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
City of Muscle Shoals, Alabama vs. 3M | Pending Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of named claimants | plaintiff |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29 |  |
Number of personal injury actions against 3M |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 | 9
Number of cases transferred to MDL | case |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 |
Number of cases pending transfer | case |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |
PFAS Contamination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  | 2 | 2 |  | 2 | 2 | 2 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
PWS Settlement | Pending Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of named claimants | plaintiff |  | 25 |  |  | 25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible settlement amount | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,500,000,000 |  | $ 12,500,000,000 | $ 12,500,000,000 | $ 12,500,000,000
Pre-tax charge on settlement | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,300,000,000 |  |  |  |  |
Present value of possible loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.20% |  | 5.20% | 5.20% | 5.20%
Number of cases | case |  |  |  |  | 25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PWS Settlement | Pending Litigation | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of cases to undergo further discovery | case | 9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PWS Settlement | Pending Litigation | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible settlement amount | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,500,000,000 |  | $ 10,500,000,000 | $ 10,500,000,000 | $ 10,500,000,000
PWS Settlement | Pending Litigation | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible settlement amount | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,500,000,000 |  | $ 12,500,000,000 | $ 12,500,000,000 | $ 12,500,000,000
Environmental Matters - Regulatory Activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years after phase-out decision in May 2000 that the Company stopped manufacturing and using vast majority of perfluorooctanyl compounds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |
Environmental Matters - Litigation | New Jersey |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  | 2 |  |  |  |  |  |  |
Number of additional new claims filed |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Environmental Matters - Litigation | Salem County, New Jersey |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of facilities related to the manufacture and disposal of PFAS | facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Environmental Matters - Litigation | New Hampshire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of cases transferred to MDL |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Environmental Matters - Litigation | Vermont |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of cases transferred to MDL |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |
Environmental Matters - Litigation | Illinois |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |
Environmental Matters - Aqueous Film Forming Foam Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of putative class action and other lawsuits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,017 |  |  |  |
Number of class action lawsuits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 49 |  |  |  |
Number of public water system lawsuits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 741 |  | 741 | 741 | 741
Number of pre-suits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |
Environmental Matters - Aqueous Film Forming Foam Litigation | Various state courts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits pending |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  | 5 | 5 | 5
Number of lawsuits filed |  |  |  |  |  |  |  |  |  |  |  |  | 8 |  |  |  |  |  |  |  |  |
Environmental Matters - Aqueous Film Forming Foam Litigation | Federal court |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits pending |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  | 2 | 2 | 2
Claims dismissed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |
Environmental Matters - Other PFAS-related Environmental Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) accrued loss contingency reserve | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |  |  |  |
Litigation payments | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 |  |  |  |
Environmental Matters - Other PFAS-related Environmental Litigation | New Jersey |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28 |  |  |  |
Number of lawsuits seeking medical monitoring and damages | case |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 |  |  |  |
Environmental Matters - Other PFAS-related Environmental Litigation | Alabama and Georgia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of putative class action and other lawsuits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |  |
Environmental Matters - Other PFAS-related Environmental Litigation | Delaware. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of putative class action and other lawsuits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |
Environmental Matters - Other PFAS-related Environmental Litigation | Decatur, Alabama |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of perfluorinated materials (FBSA and FBSEE) | perfluorinated_material |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |
Environmental Matters Other Pfc Related Environmental Litigation, Individual Cases | New Jersey |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18 |  |  |  |
Environmental Matters - Other Environmental Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued loss contingency reserve | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,300,000,000 |  | $ 11,300,000,000 | $ 11,300,000,000 | $ 11,300,000,000
Environmental Matters - Other Environmental Litigation | Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued loss contingency reserve | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,800,000,000 |  | 4,800,000,000 | 4,800,000,000 | 4,800,000,000
Environmental Matters - Other Environmental Litigation | Other liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued loss contingency reserve | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,500,000,000 |  | 6,500,000,000 | 6,500,000,000 | 6,500,000,000
Environmental Matters - Other Environmental Litigation | New Jersey |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Approximate number of miles of a river seeking to be cleaned | mi |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8 |  |  |  |  |  |
The value the award the plaintiff seeks | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 165,000,000 |  |  |  |  |  |
Number of chemicals of concern in the sediment | chemical |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8 |  |  |  |  |  |
Number of commercial drum conditioning facilities | facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Environmental Matters - Other Environmental Litigation | New Jersey | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of unnamed defendant | defendant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 120 |  |  |  |  |  |
Environmental Matters - Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued loss contingency reserve | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 | 0 | 0
Environmental Matters - Remediation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued loss contingency reserve | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 35,000,000 |  | $ 35,000,000 | $ 35,000,000 | $ 35,000,000
Number of years remediation payments expected to be paid for applicable sites |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 years |  |  |  |

X
- Definition Litigation Settlement, Amount Awarded To Other Party, Number Of Plaintiffs Awarded + References No definition available. + Details
Name: | mmm_LitigationSettlementAmountAwardedToOtherPartyNumberOfPlaintiffsAwarded
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of years the Company expects it will pay the amounts recorded over the periods of remediation for the applicable sites. + References No definition available. + Details
Name: | mmm_LossContingencyAccrualAtCarryingValueRemediationPaymentsYears
Namespace Prefix: | mmm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Accrual, Discount Rate + References No definition available. + Details
Name: | mmm_LossContingencyAccrualDiscountRate
Namespace Prefix: | mmm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total number of additional new claims filed pertaining to a loss contingency during the period. + References No definition available. + Details
Name: | mmm_LossContingencyAdditionalNewClaimsFiledNumber
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The approximate number of miles of the river plaintiffs are seeking to be cleaned. + References No definition available. + Details
Name: | mmm_LossContingencyApproximateMilesOfRiverToBeCleanedNumber
Namespace Prefix: | mmm_
Data Type: | dtr-types1:lengthItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of cases in which medical monitoring and damages is sought. + References No definition available. + Details
Name: | mmm_LossContingencyMedicalMonitoringAndDamages
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Number Of Actions Taken From Lawsuits + References No definition available. + Details
Name: | mmm_LossContingencyNumberOfActionsTakenFromLawsuits
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Loss Contingency, Number Of Cases + References No definition available. + Details
Name: | mmm_LossContingencyNumberOfCases
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Number Of Cases Pending Transfer + References No definition available. + Details
Name: | mmm_LossContingencyNumberOfCasesPendingTransfer
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Loss Contingency, Number Of Cases To Undergo Further Discovery + References No definition available. + Details
Name: | mmm_LossContingencyNumberOfCasesToUndergoFurtherDiscovery
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Loss Contingency, Number Of Cases Transferred To MDL + References No definition available. + Details
Name: | mmm_LossContingencyNumberOfCasesTransferredToMDL
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Loss Contingency, Number of Personal Injury Actions Against Company + References No definition available. + Details
Name: | mmm_LossContingencyNumberOfPersonalInjuryActionsAgainstCompany
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Loss Contingency, Number Of Pre-Suits + References No definition available. + Details
Name: | mmm_LossContingencyNumberOfPreSuits
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Loss Contingency, Number Of Public Water System Lawsuits + References No definition available. + Details
Name: | mmm_LossContingencyNumberOfPublicWaterSystemLawsuits
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of chemicals of concern in the sediment. + References No definition available. + Details
Name: | mmm_NumberOfChemicalsOfConcern
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of class action lawsuits involved. + References No definition available. + Details
Name: | mmm_NumberOfClassActionLawsuits
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of commercial drum conditioning facilities. + References No definition available. + Details
Name: | mmm_NumberOfCommercialDrumConditioningFacilities
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of facilities related to the manufacture and disposal of PFAS. + References No definition available. + Details
Name: | mmm_NumberOfFacilitiesRelatedToManufactureAndDisposalOfPFS
Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
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