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Temporary Equity, Equity and Dividends (Schedule of Quarterly Dividends Declared and Paid) (Details) - USD ($) $ / shares in Units, $ in Millions |  | 6 Months Ended
--- | --- | ---
Mar. 07, 2023 | Jun. 30, 2023 | Jun. 30, 2022
Special Dividend [Member] |  |  |
Dividends Payable [Line Items] |  |  |
Dividend per share | $ 1.08 | $ 1.08 |
Total dividends |  | $ 120.4 |
Fourth quarter 2021 |  |  |
Dividends Payable [Line Items] |  |  |
Dividend per share |  |  | $ 0.25
Total dividends |  |  | $ 27.7
First quarter 2022 |  |  |
Dividends Payable [Line Items] |  |  |
Dividend per share |  |  | $ 0.25
Total dividends |  |  | $ 27.7
Fourth Quarter 2022 [Member] |  |  |
Dividends Payable [Line Items] |  |  |
Dividend per share |  | $ 0.27 |
Total dividends |  | $ 30.0 |
First quarter 2023 |  |  |
Dividends Payable [Line Items] |  |  |
Dividend per share |  | $ 0.27 |
Total dividends |  | $ 49.1 |

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