Debt and Credit Arrangements - Senior Secured and Unsecured Notes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 22, 2022
Debt Instrument
Interest expense, debt	$ 299.0
Secured and Unsecured Debt
Debt Instrument
Amortization of Debt Discount (Premium)	3.0	$ 0.1
Interest expense, debt	$ 161.3	4.4
Secured Debt | Senior secured notes due 2030
Debt Instrument
Debt instrument stated interest rate (percent)	7.50%		7.50%
Interest expense, debt	$ 109.7	3.0
Unsecured Debt | Senior unsecured notes due 2031
Debt Instrument
Debt instrument stated interest rate (percent)	9.50%		9.50%
Interest expense, debt	$ 48.6	$ 1.3