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Business Segments - Income Statement Items (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2016 USD ($) segment | Jun. 30, 2015 USD ($)
Information concerning revenue, gross profit and income from operations by segment |  |  |  |  |  |  |  |  |
Number of reportable operating business segments | segment |  |  |  |  |  | 3 |  |  |
Revenue: |  |  |  |  |  |  |  |  |
Total revenue |  | $ 6,633.0 | [1] | $ 8,496.4 | [2] | $ 11,823.9 | [1] | $ 15,837.1 | [2]
Gross profit: |  |  |  |  |  |  |  |  |
Gross profit |  | 218.5 | [1] | 190.4 | [2] | 440.0 | [1] | 404.0 | [2]
Income from operations: |  |  |  |  |  |  |  |  |
Income from operations |  | 45.6 | [1] | 41.6 | [2] | 106.6 | [1] | 109.2 | [2]
Aviation Segment |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |
Total revenue | [3] | 2,621.6 |  | 3,185.3 |  | 4,841.0 |  | 6,082.3 |
Gross profit: |  |  |  |  |  |  |  |  |
Gross profit | [3] | 98.6 |  | 85.0 |  | 187.3 |  | 166.1 |
Land Segment |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |
Total revenue | [3] | 2,171.0 |  | 2,505.7 |  | 3,866.0 |  | 4,628.7 |
Gross profit: |  |  |  |  |  |  |  |  |
Gross profit | [3] | 80.2 |  | 63.6 |  | 173.9 |  | 142.2 |
Marine segment |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |
Total revenue | [3] | 1,840.4 |  | 2,805.4 |  | 3,116.9 |  | 5,126.1 |
Gross profit: |  |  |  |  |  |  |  |  |
Gross profit | [3] | 39.7 |  | 41.8 |  | 78.8 |  | 95.7 |
Operating Segments |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |
Income from operations | [3] | 64.4 |  | 56.1 |  | 143.8 |  | 138.0 |
Operating Segments | Aviation Segment |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |
Income from operations | [3] | 37.2 |  | 26.0 |  | 71.2 |  | 52.0 |
Operating Segments | Land Segment |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |
Income from operations | [3] | 16.2 |  | 16.5 |  | 50.1 |  | 46.2 |
Operating Segments | Marine segment |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |
Income from operations | [3] | 11.0 |  | 13.6 |  | 22.5 |  | 39.8 |
Corporate |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |
Income from operations | [3] | $ (18.8) |  | $ (14.5) |  | $ (37.2) |  | $ (28.7) |
[1] | Amounts may not add due to rounding
[2] | Amounts may not add due to rounding
[3] | Amounts may not add due to rounding

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