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Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2020
Significant Accounting Policies |
Earnings per share |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three months ended |
​ | ​ | March 31, | ​
(Amounts in millions, except per share amounts) |  | 2020 |  | 2019 |
Numerator: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income attributable to 3M | ​ | $ | 1,292 | ​ | $ | 891 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator for weighted average 3M common shares outstanding – basic | ​ |  | 576.8 | ​ |  | 577.5 | ​
Dilution associated with the Company’s stock-based compensation plans | ​ |  | 4.7 | ​ |  | 11.0 | ​
Denominator for weighted average 3M common shares outstanding – diluted | ​ |  | 581.5 | ​ |  | 588.5 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per share attributable to 3M common shareholders – basic | ​ | $ | 2.24 | ​ | $ | 1.54 | ​
Earnings per share attributable to 3M common shareholders – diluted | ​ | $ | 2.22 | ​ | $ | 1.51 | ​

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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