Long-Term Debt - Components (Details) - USD ($) $ in Millions	Dec. 31, 2023	Aug. 31, 2023	Dec. 31, 2022	Nov. 22, 2019
Debt Instrument [Line Items]
Senior Notes	$ 550.0		$ 550.0	$ 550.0
Long-term Debt, Gross	1,048.8		1,072.3
Unamortized Debt Issuance Expense	(7.2)		(5.7)
Long-term Debt	1,036.6		1,066.6
Long-Term Line of Credit	0.0		31.5
Long-Term Debt, Maturities, Repayments of Principal in Next Rolling 12 Months	(5.0)		$ 0.0
$500 Million Revolving Credit Facility, Due February 2028
Debt Instrument [Line Items]
Long-Term Line of Credit		$ 500.0
$498.8 Million Term B Loan Facility, due August 2030
Debt Instrument [Line Items]
Secured Debt	$ 498.8