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Quarterly Data (Unaudited) (Details) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 USD ($) $ / shares | Sep. 30, 2017 USD ($) $ / shares | Jun. 30, 2017 USD ($) $ / shares | Mar. 31, 2017 USD ($) $ / shares | Dec. 31, 2016 USD ($) $ / shares | Sep. 30, 2016 USD ($) $ / shares | Jun. 30, 2016 USD ($) $ / shares | Mar. 31, 2016 USD ($) $ / shares | Dec. 31, 2017 USD ($) $ / shares | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 USD ($) $ / shares
Quarterly Data (Unaudited) |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 7,990 | $ 8,172 | $ 7,810 | $ 7,685 | $ 7,329 | $ 7,709 | $ 7,662 | $ 7,409 | $ 31,657 | $ 30,109 | $ 30,274
Cost of sales | 4,094 | 4,059 | 4,020 | 3,882 | 3,736 | 3,867 | 3,817 | 3,698 | 16,055 | 15,118 | 15,351
Net income including noncontrolling interest | 525 | 1,433 | 1,585 | 1,326 | 1,156 | 1,331 | 1,293 | 1,278 | 4,869 | 5,058 | 4,841
Net income attributable to 3M | $ 523 | $ 1,429 | $ 1,583 | $ 1,323 | $ 1,155 | $ 1,329 | $ 1,291 | $ 1,275 | $ 4,858 | $ 5,050 | $ 4,833
Earnings per share attributable to 3M common shareholders - basic (in dollars per share) | $ / shares | $ 0.88 | $ 2.39 | $ 2.65 | $ 2.21 | $ 1.93 | $ 2.20 | $ 2.13 | $ 2.10 | $ 8.13 | $ 8.35 | $ 7.72
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share) | $ / shares | $ 0.85 | $ 2.33 | $ 2.58 | $ 2.16 | $ 1.88 | $ 2.15 | $ 2.08 | $ 2.05 | $ 7.93 | $ 8.16 | $ 7.58
Provisional income tax expense (benefit) from enactment of Tax Cuts and Jobs Act of 2017 | $ 762 |  |  |  |  |  |  |  |  |  |
Impact on diluted earnings per share as a result of the Tax Cuts And Jobs Act Of 2017 | $ / shares | 1.25 |  |  |  |  |  |  |  | 1.24 |  |

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