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Supplemental Equity and Comprehensive Income Information - Dividends and Transfer of Ownership Interest (Details) - $ / shares | 3 Months Ended | 12 Months Ended
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Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Dividends declared in current period (in dollars per share) | $ 1.36 | $ 1.36 | $ 1.36 | $ 1.36 | $ 1.175 | $ 1.175 | $ 1.175 | $ 1.175 | $ 1.11 | $ 1.11 | $ 1.11 | $ 1.11 | $ 5.44 | $ 4.70 | $ 4.44
3M India Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
3M's ownership (as a percent) | 75.00% |  |  |  |  |  |  |  |  |  |  |  | 75.00% |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |