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Quarterly Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Data (Unaudited) |
Schedule of Quarterly Financial Information |
(Millions, except per-share amounts) |  | First |  | Second |  | Third |  | Fourth |  | Year |
2017 |  | Quarter |  | Quarter |  | Quarter |  | Quarter |  | 2017 |
Net sales |  | $ | 7,685 |  | $ | 7,810 |  | $ | 8,172 |  | $ | 7,990 |  | $ | 31,657 |
Cost of sales |  |  | 3,882 |  |  | 4,020 |  |  | 4,059 |  |  | 4,094 |  |  | 16,055 |
Net income including noncontrolling interest |  |  | 1,326 |  |  | 1,585 |  |  | 1,433 |  |  | 525 |  |  | 4,869 |
Net income attributable to 3M |  |  | 1,323 |  |  | 1,583 |  |  | 1,429 |  |  | 523 |  |  | 4,858 |
Earnings per share attributable to 3M common shareholders - basic |  |  | 2.21 |  |  | 2.65 |  |  | 2.39 |  |  | 0.88 |  |  | 8.13 |
Earnings per share attributable to 3M common shareholders - diluted |  |  | 2.16 |  |  | 2.58 |  |  | 2.33 |  |  | 0.85 |  |  | 7.93 |
(Millions, except per-share amounts) |  | First |  | Second |  | Third |  | Fourth |  | Year |
2016 |  | Quarter |  | Quarter |  | Quarter |  | Quarter |  | 2016 |
Net sales |  | $ | 7,409 |  | $ | 7,662 |  | $ | 7,709 |  | $ | 7,329 |  | $ | 30,109 |
Cost of sales |  |  | 3,698 |  |  | 3,817 |  |  | 3,867 |  |  | 3,736 |  |  | 15,118 |
Net income including noncontrolling interest |  |  | 1,278 |  |  | 1,293 |  |  | 1,331 |  |  | 1,156 |  |  | 5,058 |
Net income attributable to 3M |  |  | 1,275 |  |  | 1,291 |  |  | 1,329 |  |  | 1,155 |  |  | 5,050 |
Earnings per share attributable to 3M common shareholders - basic |  |  | 2.10 |  |  | 2.13 |  |  | 2.20 |  |  | 1.93 |  |  | 8.35 |
Earnings per share attributable to 3M common shareholders - diluted |  |  | 2.05 |  |  | 2.08 |  |  | 2.15 |  |  | 1.88 |  |  | 8.16 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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