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Other Financial Data (Tables) | 6 Months Ended
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Jun. 30, 2021
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |
Summary of Major Classes of Other Current Assets | Major classes of other current assets consist of the following (in millions):
|  | June 30, 2021 |  |  | December 31, 2020 |
Premium finance advances and loans |  | $ | 443.3 |  |  | $ | 442.7 |
Accrued supplemental, direct bill and other receivables |  |  | 375.6 |  |  |  | 361.7 |
Refined coal production related receivables |  |  | 137.8 |  |  |  | 95.4 |
Deferred contract costs |  |  | 80.7 |  |  |  | 102.0 |
Prepaid expenses |  |  | 132.1 |  |  |  | 112.1 |
Total other current assets |  | $ | 1,169.5 |  |  | $ | 1,113.9 |

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