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Summary Quarterly Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Summary of unaudited quarterly result |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 7,792.1 | $ 7,399.8 | $ 6,633.0 | $ 5,190.8 | $ 6,733.6 | $ 7,810.7 | $ 8,496.4 | $ 7,340.7 | $ 27,015.8 | $ 30,381.4 | $ 43,391.8
Gross profit | 222.3 | 236.7 | 218.5 | 221.5 | 230.2 | 226.7 | 190.4 | 213.6 | 899.0 | 861.0 | 819.1
Net income including noncontrolling interest | 2.1 | 43.0 | 29.8 | 51.6 | 49.6 | 42.7 | 29.0 | 49.3 | 126.4 | 170.5 | 221.1
Net income attributable to World Fuel | $ 2.2 | $ 42.7 | $ 30.0 | $ 51.8 | $ 49.9 | $ 43.7 | $ 30.5 | $ 50.3 | $ 126.5 | $ 174.5 | $ 224.5
Basic earnings per common share (in dollars per share) | $ 0.03 | $ 0.62 | $ 0.43 | $ 0.74 | $ 0.72 | $ 0.62 | $ 0.43 | $ 0.71 | $ 1.82 | $ 2.49 | $ 3.17
Diluted earnings per common share (in dollars per share) | $ 0.03 | $ 0.61 | $ 0.43 | $ 0.74 | $ 0.71 | $ 0.62 | $ 0.43 | $ 0.70 | $ 1.81 | $ 2.47 | $ 3.15
Employment Agreement |  |  |  |  |  |  |  |  |  |  |
Summary of unaudited quarterly result |  |  |  |  |  |  |  |  |  |  |
Severance termination charge, net of tax |  |  |  |  |  |  |  | $ 2.3 |  |  |
Severance termination charge, impact on basic and diluted earnings per share (in dollars per share) |  |  |  |  |  |  |  | $ 0.03 |  |  |

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