| Schedule of revenue, gross profit and income from operations by segment |
Information concerning our revenue, gross profit and income from operations by segment is as follows (in millions): | | | | | | | | | | | | For the Three Months Ended | | | March 31, | Revenue: | | 2018 | | 2017 | Aviation segment | | $ | 4,292.9 |
| | $ | 3,317.4 |
| Land segment | | 2,860.7 |
| | 2,783.4 |
| Marine segment | | 2,027.7 |
| | 2,093.5 |
| | | $ | 9,181.3 |
| | $ | 8,194.3 |
| | | | | | Gross profit: | | | | | Aviation segment | | $ | 110.0 |
| | $ | 100.0 |
| Land segment | | 102.2 |
| | 97.8 |
| Marine segment | | 31.2 |
| | 33.6 |
| | | $ | 243.4 |
| | $ | 231.4 |
| Income from operations: | | | | | Aviation segment | | $ | 47.8 |
| | $ | 40.4 |
| Land segment | | 19.6 |
| | 21.4 |
| Marine segment | | 8.6 |
| | 8.3 |
| | | 75.9 |
| | 70.1 |
| Corporate overhead - unallocated | | (18.7 | ) | | (19.8 | ) | | | $ | 57.2 |
| | $ | 50.3 |
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| Schedule of accounts receivable, net and total assets by segment |
Information concerning our accounts receivable, net and total assets by segment is as follows (in millions): | | | | | | | | | | | | As of | | | March 31, | | December 31, | | | 2018 | | 2017 | Accounts receivable, net: | | | | | Aviation segment, net of allowance for bad debt of $11.1 and $10.8 as of March 31, 2018 and December 31, 2017, respectively | | $ | 991.1 |
| | $ | 1,013.0 |
| Land segment, net of allowance for bad debt of $4.1 and $6.6 as of March 31, 2018 and December 31, 2017, respectively | | 912.4 |
| | 874.7 |
| Marine segment, net of allowance for bad debt of $9.4 and $10.4 as of March 31, 2018 and December 31, 2017, respectively | | 762.7 |
| | 817.9 |
| | | $ | 2,666.3 |
| | $ | 2,705.6 |
| Total assets: | | |
| | |
| Aviation segment | | $ | 2,160.2 |
| | $ | 2,240.4 |
| Land segment | | 2,144.3 |
| | 2,091.4 |
| Marine segment | | 986.5 |
| | 1,097.1 |
| Corporate | | 181.0 |
| | 158.9 |
| | | $ | 5,472.1 |
| | $ | 5,587.8 |
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