Debt and Credit Arrangements - Notes Interest Accretion Schedule (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 22, 2022
Debt Instrument
Interest expense, debt	$ 87.5		$ 216.0
Revolving Credit Facility
Debt Instrument
Interest expense, debt	50.5	$ 6.4	104.6	$ 14.7
Senior secured revolving credit facility due October 2026 | Revolving Credit Facility
Debt Instrument
Interest expense, debt	$ 9.2	6.4	$ 23.6	14.7
Debt instrument stated interest rate (percent)	7.00%		7.00%		3.40%
Term Loan Due 2030 | Revolving Credit Facility
Debt Instrument
Interest expense, debt	$ 41.3	$ 0.0	$ 81.0	$ 0.0
Secured And Unsecured Debt
Debt Instrument
Interest accretion of senior notes discount	0.9		2.3
Interest expense, debt	40.3		120.7
Secured Debt | Senior secured notes due 2030
Debt Instrument
Interest expense, debt	$ 27.3		$ 82.1
Debt instrument stated interest rate (percent)	7.50%		7.50%			7.50%
Unsecured Debt | Senior unsecured notes due 2031
Debt Instrument
Interest expense, debt	$ 12.1		$ 36.3
Debt instrument stated interest rate (percent)	9.50%		9.50%			9.50%