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Long-Term Debt - Long-Term Debt Notes Payable Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Payments of long-term debt	$ 155.4	$ 184.8	$ 458.3
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 184.6	$ 186.4	$ 172.6
Unsecured Debt [Member] | 6.25% Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.25%	6.25%	6.25%
Payments of long-term debt	$ 127.6	$ 50.0	$ 220.0
Interest Paid, Excluding Capitalized Interest, Operating Activities	2.2	0.9	0.2
Write off of Deferred Debt Issuance Cost	$ 0.4	0.2	1.8
Redemption Premium			$ 3.4
Unsecured Debt [Member] | 6.25% Notes Due 2026 [Member] | Open market repurchase
Debt Instrument [Line Items]
Payments of long-term debt		$ 2.4

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