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Cash, Cash Equivalents and Restricted Cash (Tables) | 12 Months Ended
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Dec. 31, 2018
Cash, Cash Equivalents and Restricted Cash [Abstract] |
Schedule of Cash and Cash Equivalents | The following table summarizes the Company’s cash, cash equivalents and restricted cash as presented on the consolidated balance sheet to amounts on the consolidated statement of cash flows (in millions):
| December 31, 2018 |  | December 31, 2017
Cash and cash equivalents | $ | 123.1 |  |  | $ | 208.8 |
Deposits for financial assurance - current | 30.3 |  |  | 16.3 |
Deposits for financial assurance - noncurrent | 6.3 |  |  | 19.7 |
Total cash, cash equivalents and restricted cash | $ | 159.7 |  |  | $ | 244.8 |
Restrictions on Cash and Cash Equivalents | The following table provides additional detail regarding the Company’s deposits for financial assurance (in millions):
| December 31, 2018 |  | December 31, 2017
| Current |  | Long-Term |  | Current |  | Long-Term
NRC license | $ | 16.3 |  |  | $ | — |  |  | $ | 16.1 |  |  | $ | — |
DOE lease | 13.8 |  |  | — |  |  | — |  |  | 13.5 |
Workers compensation | — |  |  | 6.0 |  |  | — |  |  | 5.9 |
Other | 0.2 |  |  | 0.3 |  |  | 0.2 |  |  | 0.3 |
Total deposits for financial assurance | $ | 30.3 |  |  | $ | 6.3 |  |  | $ | 16.3 |  |  | $ | 19.7 |

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