XML 145 R127.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Business Segments (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 segment | Dec. 31, 2017 USD ($)
Business Segment Information |  |
Number of business segments | segment | 5 |
Percentage of net sales for countries that centralized sales districts to overall international net sales | 70.00% |
Business Segments. | Business Segments in Aggregate |  |
Business Segment Information |  |
Increase (decrease) in net sales due to dual credit reporting change from consolidation of U.S. customer account activity |  | $ 1,568.0
Increase (decrease) in operating income due to dual credit reporting change from consolidation of U.S. customer account activity |  | 402.0
Business Segments. | Electronics And Energy |  |
Business Segment Information |  |
Increase (decrease) in net sales due to centralization of manufacturing and supply technology platforms |  | (1.0)
Increase (decrease) in operating income due to centralization of manufacturing and supply technology platforms |  | 42.0
Corporate and Unallocated |  |
Business Segment Information |  |
Increase (decrease) in net sales due to centralization of manufacturing and supply technology platforms |  | 1.0
Increase (decrease) in operating income due to centralization of manufacturing and supply technology platforms |  | (42.0)
Elimination of Dual Credit | Business Segments in Aggregate |  |
Business Segment Information |  |
Increase (decrease) in net sales due to dual credit reporting change from consolidation of U.S. customer account activity |  | 1,568.0
Increase (decrease) in operating income due to dual credit reporting change from consolidation of U.S. customer account activity |  | $ 402.0

X
- Definition The increase or decrease in net sales related to the centralization of manufacturing and supply technology platforms. + References No definition available. + Details
Name: | mmm_IncreaseDecreaseInNetSalesDueToCentralizationOfManufacturingAndSupplyTechnologyPlatforms
Namespace Prefix: | mmm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The element represents the increase or decrease in net sales related to the dual credit reporting change that resulted from consolidating U.S. customer account activity. + References No definition available. + Details
Name: | mmm_IncreaseDecreaseInNetSalesDueToDualCreditReportingChange
Namespace Prefix: | mmm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase or decrease in operating income related to the centralization of manufacturing and supply technology platforms. + References No definition available. + Details
Name: | mmm_IncreaseDecreaseInOperatingIncomeDueToCentralizationOfManufacturingAndSupplyTechnologyPlatforms
Namespace Prefix: | mmm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the increase or decrease in net sales related to the dual credit reporting change that resulted from consolidating U.S. customer account activity. + References No definition available. + Details
Name: | mmm_IncreaseDecreaseInOperatingIncomeDueToDualCreditReportingChange
Namespace Prefix: | mmm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The ratio of net sales related to countries that expanded dual credit to overall international net sales. + References No definition available. + Details
Name: | mmm_PercentOfCountryNetSalesToOverallInternationalNetSalesRelatedToCentralizedSalesDistricts
Namespace Prefix: | mmm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mmm_BusinessSegmentsInAggregateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mmm_ElectronicsAndEnergySegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |