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Business Segments - Income Statement Items (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2016 USD ($) segment | Mar. 31, 2015 USD ($)
Information concerning revenue, gross profit and income from operations by segment |  |  |
Number of reportable operating business segments | segment |  | 3 |
Revenue: |  |  |
Total revenue | [1] | $ 5,192.6 | $ 7,340.7
Gross profit: |  |  |
Gross profit | [1] | 223.8 | 215.4
Income from operations: |  |  |
Income from operations | [1] | 63.3 | 71.5
Aviation Segment |  |  |
Revenue: |  |  |
Total revenue | [2] | 2,221.1 | 2,897.0
Gross profit: |  |  |
Gross profit | [2] | 91.0 | 82.9
Land Segment |  |  |
Revenue: |  |  |
Total revenue | [2] | 1,695.0 | 2,123.0
Gross profit: |  |  |
Gross profit | [2] | 93.6 | 78.6
Marine segment |  |  |
Revenue: |  |  |
Total revenue | [2] | 1,276.5 | 2,320.7
Gross profit: |  |  |
Gross profit | [2] | 39.2 | 53.9
Operating Segments |  |  |
Income from operations: |  |  |
Income from operations | [2] | 81.7 | 85.7
Operating Segments | Aviation Segment |  |  |
Income from operations: |  |  |
Income from operations | [2] | 36.3 | 27.8
Operating Segments | Land Segment |  |  |
Income from operations: |  |  |
Income from operations | [2] | 34.0 | 31.8
Operating Segments | Marine segment |  |  |
Income from operations: |  |  |
Income from operations | [2] | 11.4 | 26.1
Corporate |  |  |
Income from operations: |  |  |
Income from operations | [2] | $ (18.4) | $ (14.2)
[1] | Amounts may not add due to rounding
[2] | Amounts may not add due to rounding

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