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Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2023
Accounting Policies [Abstract] |
Schedule of Earnings (Loss) Per Share Computations | Earnings (Loss) Per Share Computations
|  | Three months ended June 30, |  | Six months ended June 30, |
(Amounts in millions, except per share amounts) |  | 2023 |  | 2022 |  | 2023 |  | 2022 |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to 3M |  | $ | (6,841) |  |  | $ | 78 |  |  | $ | (5,865) |  |  | $ | 1,377 |  |  |  |  |  |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for weighted average 3M common shares outstanding – basic |  | 553.9 |  |  | 571.0 |  |  | 553.3 |  |  | 571.6 |  |  |  |  |  |
Dilution associated with the Company’s stock-based compensation plans |  | — |  |  | 1.7 |  |  | — |  |  | 2.2 |  |  |  |  |  |
Denominator for weighted average 3M common shares outstanding – diluted |  | 553.9 |  |  | 572.7 |  |  | 553.3 |  |  | 573.8 |  |  |  |  |  |
Earnings (loss) per share attributable to 3M common shareholders — basic |  | $ | (12.35) |  |  | $ | 0.14 |  |  | $ | (10.60) |  |  | $ | 2.41 |  |  |  |  |  |
Earnings (loss) per share attributable to 3M common shareholders — diluted |  | $ | (12.35) |  |  | $ | 0.14 |  |  | $ | (10.60) |  |  | $ | 2.40 |  |  |  |  |  |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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