Commitments and Contingencies (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 20, 2024	Aug. 14, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Loss Contingencies [Line Items]
Other expenses, net			$ 270.0	$ 535.0	$ 720.0	$ 922.0
Judicial ruling
Loss Contingencies [Line Items]
Litigation interest	$ 199.7
Senior Preferred Stock Purchase Agreements Litigation
Loss Contingencies [Line Items]
Awarded damages to Fannie Mae		$ 299.4
Litigation interest rate	5.01%
Other expenses, net			$ 6.0		$ 17.0		$ 495.0