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Other Financial Data (Tables) | 6 Months Ended
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Jun. 30, 2022
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, 2022 |  |  | December 31, 2021 |
Premium finance advances and loans |  | $ | 470.3 |  |  | $ | 509.7 |
Accrued supplemental, direct bill and other receivables |  |  | 758.9 |  |  |  | 563.0 |
Refined coal production related and other receivables |  |  | 6.4 |  |  |  | 76.9 |
Deferred contract costs |  |  | 93.2 |  |  |  | 129.7 |
Prepaid expenses |  |  | 173.9 |  |  |  | 171.7 |
Total other current assets |  | $ | 1,502.7 |  |  | $ | 1,451.0 |

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