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Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) reporting_unit | Dec. 31, 2023 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Restricted cash | $ 6.0 | $ 6.0
Interest trade receivable percentage | 100.00% |
Disposal group, including discontinued operation, accounts, notes and loans receivable, net | $ 45.0 | 60.0
Number of reporting units | reporting_unit | 7 |
Cash and cash equivalents | $ 350.2 | 365.5
Capital Requirements |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Restricted cash | 70.4 |
Other Current Assets |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Assets held for sale | 2.5 |
Other Sundry Assets |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Assets held for sale | $ 4.7 | $ 7.3

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