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Business Segments, Geographic Information, and Major Customers - Income Statement Items (Details) $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) segment | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Information concerning revenue, gross profit and income from operations by segment |  |  |  |  |  |  |  |  |  |  |
Number of reportable operating business segments | segment |  |  |  |  |  |  |  |  | 3 |  |
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 7,792.1 | $ 7,399.8 | $ 6,633.0 | $ 5,190.8 | $ 6,733.6 | $ 7,810.7 | $ 8,496.4 | $ 7,340.7 | $ 27,015.8 | $ 30,381.4 | $ 43,391.8
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit | $ 222.3 | $ 236.7 | $ 218.5 | $ 221.5 | $ 230.2 | $ 226.7 | $ 190.4 | $ 213.6 | 899.0 | 861.0 | 819.1
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 188.9 | 245.7 | 276.7
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 82.3 | 65.5 | 57.3
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 37.7 | 48.4 | 51.8
Aviation segment |  |  |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 10,914.4 | 11,739.8 | 17,268.8
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 401.0 | 361.9 | 323.4
Marine segment |  |  |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 7,182.5 | 9,367.2 | 13,843.3
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 149.5 | 189.6 | 207.8
Land segment |  |  |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 8,918.8 | 9,274.3 | 12,279.6
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 348.5 | 309.5 | 287.9
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 261.5 | 306.5 | 330.2
Operating Segments | Aviation segment |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 160.5 | 132.2 | 144.1
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 24.2 | 22.6 | 15.4
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 4.9 | 13.4 | 9.0
Operating Segments | Marine segment |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 30.2 | 73.0 | 92.2
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 6.6 | 6.4 | 5.6
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 6.1 | 8.0 | 13.9
Operating Segments | Land segment |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 70.8 | 101.4 | 93.9
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 47.1 | 32.9 | 32.5
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 12.3 | 16.4 | 16.0
Corporate |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | (72.7) | (60.9) | (53.5)
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 4.4 | 3.7 | 3.7
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | $ 14.5 | $ 10.6 | $ 12.9

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