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Business Segments - Income Statement Items (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2017 USD ($) segment | Mar. 31, 2016 USD ($)
Information concerning revenue, gross profit and income from operations by segment |  |  |
Number of reportable operating business segments | segment |  | 3 |
Revenue: |  |  |
Total revenue | [1] | $ 8,194.3 | $ 5,190.8
Gross profit: |  |  |
Gross profit | [1] | 231.4 | 221.5
Income from operations: |  |  |
Income from operations | [1] | 50.3 | 61.0
Aviation segment |  |  |
Revenue: |  |  |
Total revenue |  | 3,317.4 | 2,219.4
Gross profit: |  |  |
Gross profit |  | 100.0 | 88.7
Land segment |  |  |
Revenue: |  |  |
Total revenue |  | 2,783.4 | 1,695.0
Gross profit: |  |  |
Gross profit |  | 97.8 | 93.6
Marine segment |  |  |
Revenue: |  |  |
Total revenue |  | 2,093.5 | 1,276.5
Gross profit: |  |  |
Gross profit |  | 33.6 | 39.2
Operating Segments |  |  |
Income from operations: |  |  |
Income from operations |  | 70.1 | 79.4
Operating Segments | Aviation segment |  |  |
Income from operations: |  |  |
Income from operations |  | 40.4 | 34.0
Operating Segments | Land segment |  |  |
Income from operations: |  |  |
Income from operations |  | 21.4 | 34.0
Operating Segments | Marine segment |  |  |
Income from operations: |  |  |
Income from operations |  | 8.3 | 11.4
Corporate |  |  |
Income from operations: |  |  |
Income from operations |  | $ (19.8) | $ (18.4)
[1] | Amounts may not add due to rounding

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