SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Subsidiaries | Affiliated Notes
Related Party Transaction [Line Items]
Interest income	$ 7.0	$ 6.0	$ 3.0
Parent Company
Related Party Transaction [Line Items]
Interest income	107.9	181.0	80.3
Parent Company | Subsidiaries
Related Party Transaction [Line Items]
Interest expense	28.0	33.0	30.0
Parent Company | Subsidiaries | Short-Term Lending
Related Party Transaction [Line Items]
Interest income	$ 84.0	$ 164.0	$ 71.0