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Other assets - Components (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Other assets: |  |
Note receivables - OPA | $ 91.6 | $ 69.1
Operating lease right-of-use assets | $ 20.6 | $ 22.7
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Total | Total
IBNR receivables | $ 15.0 | $ 13.4
Land held for development | 7.4 | 19.4
Restricted cash and cash equivalents | $ 5.5 | $ 32.4
Restricted Cash and Cash Equivalents, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Total | Total
Other | $ 21.4 | $ 16.7
Total | $ 161.5 | $ 173.7

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- Definition Amortized cost, before allowance for credit loss, of financing receivable classified as noncurrent. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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