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Business Segments - Income Statement Items (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) segment | Jun. 30, 2017 USD ($)
Information concerning revenue, gross profit and income from operations by segment |  |  |  |
Number of reportable operating business segments | segment |  |  | 3 |
Revenue: |  |  |  |
Total revenue | $ 10,150.8 | $ 8,086.2 | $ 19,332.2 | $ 16,280.4
Gross profit: |  |  |  |
Gross profit | 246.2 | 231.0 | 489.6 | 462.4
Income from operations: |  |  |  |
Income from operations | 61.1 | 51.2 | 118.3 | 101.6
Aviation segment |  |  |  |
Revenue: |  |  |  |
Total revenue | 4,900.7 | 3,508.4 | 9,193.6 | 6,825.8
Gross profit: |  |  |  |
Gross profit | 127.4 | 110.9 | 237.3 | 210.8
Land segment |  |  |  |
Revenue: |  |  |  |
Total revenue | 2,960.2 | 2,564.0 | 5,820.9 | 5,347.4
Gross profit: |  |  |  |
Gross profit | 88.6 | 87.2 | 190.8 | 185.0
Marine segment |  |  |  |
Revenue: |  |  |  |
Total revenue | 2,289.9 | 2,013.8 | 4,317.7 | 4,107.3
Gross profit: |  |  |  |
Gross profit | 30.2 | 32.9 | 61.5 | 66.6
Operating Segments |  |  |  |
Income from operations: |  |  |  |
Income from operations | 82.3 | 69.2 | 158.3 | 139.3
Operating Segments | Aviation segment |  |  |  |
Income from operations: |  |  |  |
Income from operations | 64.2 | 49.7 | 112.0 | 90.2
Operating Segments | Land segment |  |  |  |
Income from operations: |  |  |  |
Income from operations | 10.2 | 12.2 | 29.9 | 33.6
Operating Segments | Marine segment |  |  |  |
Income from operations: |  |  |  |
Income from operations | 7.9 | 7.2 | 16.4 | 15.5
Corporate |  |  |  |
Income from operations: |  |  |  |
Income from operations | $ (21.2) | $ (17.9) | $ (40.0) | $ (37.7)

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