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Performance Graph - Unaudited | 12 Months Ended
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Dec. 31, 2017
Performance Graph [Abstract] |
Cumulative Total Shareholder Return [Text Block] | PERFORMANCE GRAPH (UNAUDITED) The following graph presents the cumulative total shareholder return for the five years ending December 31, 2017 for our common stock, as compared to the Standard & Poor's 500 Stock Index and to the Dow Jones 30 Industrial Average. Our common stock price is a component of both indices. These figures assume that all dividends paid over the five-year period were reinvested, and that the starting value of each index and the investment in common stock was $100.00 on December 31, 2012. COMPARISON OF CUMULATIVE FIVE YEAR TOTAL RETURN
|  | December
|  | 2012 |  | 2013 |  | 2014 |  | 2015 |  | 2016 |  | 2017
United Technologies Corporation |  | $ | 100.00 |  |  | $ | 141.87 |  |  | $ | 146.39 |  |  | $ | 125.30 |  |  | $ | 146.66 |  |  | $ | 174.62 |
S&P 500 Index |  | $ | 100.00 |  |  | $ | 132.39 |  |  | $ | 150.51 |  |  | $ | 152.59 |  |  | $ | 170.84 |  |  | $ | 208.14 |
Dow Jones Industrial Average |  | $ | 100.00 |  |  | $ | 129.65 |  |  | $ | 142.67 |  |  | $ | 142.98 |  |  | $ | 166.56 |  |  | $ | 213.38 |

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- Definition Disclosures the cumulative total shareholder return for the current year baselined to five years prior. + References No definition available. + Details
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