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Other Assets | 3 Months Ended
--- | ---
Mar. 31, 2021
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |
Other Assets | Note 5—Other assets:
| December 31, |  |  | March 31, |
| 2020 |  |  | 2021 |
| (In millions) |
Other noncurrent assets: |  |  |  |  |  |  |
Land held for development | $ | 96.0 |  |  | $ | 80.5 |
Operating lease right-of-use assets |  | 26.1 |  |  |  | 24.6 |
Restricted cash and cash equivalents |  | 37.8 |  |  |  | 37.7 |
IBNR receivables |  | 37.1 |  |  |  | 37.7 |
Marketable securities |  | 2.9 |  |  |  | 2.8 |
Pension asset |  | 8.4 |  |  |  | 8.5 |
Note receivables - OPA |  | 25.3 |  |  |  | 30.1 |
Other |  | 8.7 |  |  |  | 10.6 |
Total | $ | 242.3 |  |  | $ | 232.5 |

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