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QUARTERLY INFORMATION (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Quarterly information by segments |  |  |  |  |  |  |  |  |  |  |
Total Operating Revenue | $ 540.7 | $ 572.1 | $ 557.9 | $ 532.4 | $ 564.9 | $ 589.4 | $ 557.1 | $ 511.4 | $ 2,203.1 | $ 2,222.8 | $ 2,046.9
Operating Income | 25.4 | 55.2 | 31.0 | 17.5 | 30.5 | 58.6 | 46.0 | 28.7 | 129.1 | 163.8 | 147.3
Interest expense, net | (5.6) | (6.2) | (6.1) | (4.6) | (4.3) | (4.4) | (5.0) | (5.0) | (22.5) | (18.7) | (24.2)
Other income (expense), net | 0.3 | (0.5) | 0.8 | 0.6 | 0.7 | 0.7 | 0.4 | 0.8 | 1.2 | 2.6 | 2.1
Income before Income Taxes | 20.1 | 48.5 | 25.7 | 13.5 | 26.9 | 54.9 | 41.4 | 24.5 | 107.8 | 147.7 | 125.2
Income tax expense | (4.5) | (12.3) | (7.3) | (1.0) | (6.3) | (13.3) | (8.8) | (10.3) | (25.1) | (38.7) | 105.8
Net Income | $ 15.6 | $ 36.2 | $ 18.4 | 12.5 | 20.6 | $ 41.6 | 32.6 | 14.2 | $ 82.7 | $ 109.0 | 231.0
Income taxes - Discrete adjustments related to the Tax Act |  |  |  | $ 2.9 | $ 0.2 |  | $ 0.2 | $ (3.3) |  |  | $ (154.0)
Net Income, Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |
Basic Earnings Per-Share: (in dollars per share) | $ 0.36 | $ 0.84 | $ 0.43 | $ 0.29 | $ 0.48 | $ 0.97 | $ 0.76 | $ 0.33 | $ 1.93 | $ 2.55 | $ 5.38
Diluted Earnings Per-Share: (in dollars per share) | $ 0.36 | $ 0.84 | $ 0.43 | $ 0.29 | $ 0.48 | $ 0.97 | $ 0.76 | $ 0.33 | $ 1.91 | $ 2.53 | $ 5.35
Ocean Transportation |  |  |  |  |  |  |  |  |  |  |
Quarterly information by segments |  |  |  |  |  |  |  |  |  |  |
Total Operating Revenue | $ 416.1 | $ 437.2 | $ 415.4 | $ 397.9 | $ 418.1 | $ 437.3 | $ 406.6 | $ 379.3 |  |  |
Operating Income | 17.8 | 43.9 | 19.7 | 9.4 | 21.4 | 48.7 | 36.5 | 24.5 |  |  |
Logistics |  |  |  |  |  |  |  |  |  |  |
Quarterly information by segments |  |  |  |  |  |  |  |  |  |  |
Total Operating Revenue | 124.6 | 134.9 | 142.5 | 134.5 | 146.8 | 152.1 | 150.5 | 132.1 |  |  |
Operating Income | $ 7.6 | $ 11.3 | $ 11.3 | $ 8.1 | $ 9.1 | $ 9.9 | $ 9.5 | $ 4.2 |  |  |

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