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Business Segments - Balance Sheet Items (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts receivable, net: |  |
Accounts receivable, net | $ 1,244.1 | $ 2,891.9
Allowance for credit losses | 51.8 | 35.5
Total assets: |  |
Total assets | 4,392.3 | 5,992.4
Corporate |  |
Total assets: |  |
Total assets | 585.6 | 296.8
Aviation segment |  |
Accounts receivable, net: |  |
Accounts receivable, net | 438.0 | 1,098.2
Allowance for credit losses | 37.3 | 14.6
Aviation segment | Operating Segments |  |
Total assets: |  |
Total assets | 1,670.4 | 2,416.5
Land segment |  |
Accounts receivable, net: |  |
Accounts receivable, net | 406.9 | 863.2
Allowance for credit losses | 5.3 | 2.8
Land segment | Operating Segments |  |
Total assets: |  |
Total assets | 1,476.0 | 2,089.4
Marine segment |  |
Accounts receivable, net: |  |
Accounts receivable, net | 399.2 | 930.5
Allowance for credit losses | 6.0 | 18.0
Marine segment | Operating Segments |  |
Total assets: |  |
Total assets | $ 660.2 | $ 1,189.7

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