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Commitments and Contingencies - Environmental (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended
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Sep. 30, 2024 USD ($) party lawsuit | Jul. 31, 2024 case | Mar. 31, 2024 plaintiff | Feb. 29, 2024 lawsuit | Jan. 31, 2024 lawsuit | Dec. 31, 2023 plaintiff case | Nov. 30, 2023 party | May 31, 2023 EUR (€) action party lawsuit | Mar. 31, 2023 lawsuit party | Dec. 31, 2022 action | Jul. 31, 2022 EUR (€) | Jun. 30, 2020 lawsuit | Jun. 30, 2019 lawsuit | May 31, 2019 lawsuit | Mar. 31, 2019 facility lawsuit | Jul. 31, 2018 USD ($) facility defendant chemical mi | Oct. 31, 2023 lawsuit | Sep. 30, 2023 USD ($) | Jun. 30, 2024 lawsuit | Jun. 30, 2022 USD ($) | Sep. 30, 2024 USD ($) party lawsuit plaintiff perfluorinated_material
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of actions taken from lawsuits | action |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Increase in liabilities, gross |  |  |  |  |  |  |  |  |  |  | € 571,000,000 |  |  |  |  |  |  |  |  | $ 500,000,000 |
Illinois |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits filed | party | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of class action lawsuits | party |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
MAINE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Claims dismissed | party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9
New plaintiffis added to property damage claims | plaintiff |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 106
Total plaintiffis | plaintiff |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 112
Belgian Civil Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits pending | party | 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PFAS Contamination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  |  | 2 | 2 |  |  | 2 | 2 |  |  |  |  |  |  |  | 2 |  |  |  |
Number of cases transferred to MDL |  |  |  |  | 1 |  |  | 1 | 1 |  |  |  |  |  |  |  | 1 |  |  |  |
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
Pre-tax charge on settlement | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,300,000,000 |  |  |
Present value of possible loss | 5.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.20%
Number of cases to undergo further discovery | case |  | 9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of cases | case |  |  |  |  |  | 25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PWS Settlement | Minimum | Pending Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible settlement amount | $ | $ 10,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,500,000,000
PWS Settlement | Maximum | Pending Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible settlement amount | $ | $ 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 lawsuits filed |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Number of cases transferred to MDL |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |
Environmental Matters - Litigation | Vermont |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits filed |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Number of cases transferred to MDL |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |
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 |  | 6,000
Number of pre-suits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Environmental Matters - Aqueous Film Forming Foam Litigation | Various state courts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits pending | 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
Claims dismissed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Environmental Matters - Other PFAS-related Environmental Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) accrued loss contingency reserve | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000
Litigation payments | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000,000,000
Environmental Matters - Other PFAS-related Environmental Litigation | Alabama and Georgia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of putative class action and other lawsuits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6
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 Environmental Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued loss contingency reserve | $ | $ 8,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,500,000,000
Environmental Matters - Other Environmental Litigation | Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued loss contingency reserve | $ | 1,900,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,900,000,000
Environmental Matters - Other Environmental Litigation | Other liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued loss contingency reserve | $ | 6,600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,600,000,000
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
Insurance receivables | $ | 27,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,000,000
Environmental Matters - Remediation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product Liability Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued loss contingency reserve | $ | $ 37,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 37,000,000
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
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- 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
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Namespace Prefix: | mmm_
Data Type: | xbrli:durationItemType
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- Definition Loss Contingency, Accrual, Discount Rate + References No definition available. + Details
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Namespace Prefix: | mmm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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- Definition The total number of additional new claims filed pertaining to a loss contingency during the period. + References No definition available. + Details
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Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- Definition The approximate number of miles of the river plaintiffs are seeking to be cleaned. + References No definition available. + Details
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Data Type: | dtr-types1:lengthItemType
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- Definition Loss Contingency, Number Of Actions Taken From Lawsuits + References No definition available. + Details
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Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- Definition Loss Contingency, Number Of Cases + References No definition available. + Details
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Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- Definition Loss Contingency, Number Of Cases To Undergo Further Discovery + References No definition available. + Details
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Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- Definition Loss Contingency, Number Of Cases Transferred To MDL + References No definition available. + Details
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Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- Definition Loss Contingency, Number Of Pre-Suits + References No definition available. + Details
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Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition New Plaintiffis Added To Property Damage Claims + References No definition available. + Details
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Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
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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
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Namespace Prefix: | mmm_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- Definition The number of facilities related to the manufacture and disposal of PFAS. + References No definition available. + Details
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Balance Type: | na
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- Definition The number of perfluorinated materials (FBSA and FBSEE) the company cannot release into "the waters of the United States." + References No definition available. + Details
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Namespace Prefix: | mmm_
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Balance Type: | na
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- Definition The number of putative class action and other lawsuits. + References No definition available. + Details
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Balance Type: | na
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- Definition The number of unnamed defendants. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Number of years after phase-out decision in May 2000 that the Company stopped manufacturing and using vast majority of perfluorooctanyl compounds. + References No definition available. + Details
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- Definition Total Plaintiffis Added To Property Damage Claims + References No definition available. + Details
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- Definition Amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. + References No definition available. + Details
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Balance Type: | debit
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- Definition The increase (decrease) during the reporting period in asbestos and environmental claims reserve, before estimated recoveries from reinsurers. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 + Details
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- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
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