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Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jul. 10, 2023 | Sep. 30, 2024 | Jun. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Jun. 20, 2023
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  | $ (0.4) |  | $ (1.1) | $ (1.9) |  |  |
Stock Issued During Period, Shares, New Issues | 200,000,000 | 115,661 |  | 0 |  |  | 567,491 | 722,568 |
Stock Issued During Period, Value, Gross |  | $ 4.6 |  | $ 0.0 |  |  | $ 24.5 | $ 24.4 |
Stock Issued During Period, Value, Net |  | 4.5 |  | 0.0 |  |  | 23.8 | 23.4 |
Direct Costs of Stock Issuance |  | $ 0.1 |  | $ 0.0 |  |  | $ 0.1 | $ 0.2 |
Preferred Stock, Par Value Per Share |  | $ 1.00 |  |  |  |  | $ 1.00 |  | $ 1.00
Minimum [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Purchase Price Increase Per Share |  |  |  |  |  |  |  |  | 18.00
Maximum [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Purchase Price Increase Per Share |  |  |  |  |  |  |  |  | $ 160.38
Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  | 0.0 |  | 0.0 | 0.0 |  |  |
Common Stock [Member] | Common Class A [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  | 0.0 |  | 0.0 | 0.0 |  |  |
Excess of Capital over Par Value [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  | $ (0.4) |  | $ (1.1) | $ (1.9) | $ (0.1) |  |

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