v3.25.2
Derivative Financial Instruments - Fair Value of Derivatives (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivatives, fair value disclosures    
Derivative instruments, assets $ 770.2 $ 648.2
Derivative instruments, liabilities (1,382.8) (1,929.9)
Fair value of embedded derivative liabilities reported with contractholder funds 863.7 578.4
Fair value of net (asset) liability embedded derivative reported with funds withheld payable (2,825.2) (3,014.5)
Derivatives designated as hedging instruments    
Derivatives, fair value disclosures    
Derivative instruments, assets 90.0 170.4
Derivative instruments, liabilities 244.3 103.7
Derivatives not designated as hedging instruments    
Derivatives, fair value disclosures    
Derivative instruments, assets 680.2 477.8
Derivative instruments, liabilities (1,627.1) (2,033.6)
Interest rate contracts | Derivatives designated as hedging instruments    
Derivatives, fair value disclosures    
Derivative instruments, liabilities 76.8 83.0
Interest rate contracts | Derivatives not designated as hedging instruments    
Derivatives, fair value disclosures    
Derivative instruments, assets 25.6 35.4
Derivative instruments, liabilities 146.1 246.9
Foreign exchange contracts | Derivatives designated as hedging instruments    
Derivatives, fair value disclosures    
Derivative instruments, assets 90.0 170.4
Derivative instruments, liabilities 167.5 20.7
Foreign exchange contracts | Derivatives not designated as hedging instruments    
Derivatives, fair value disclosures    
Derivative instruments, assets 43.5 20.0
Derivative instruments, liabilities 24.0 34.8
Equity contracts | Derivatives not designated as hedging instruments    
Derivatives, fair value disclosures    
Derivative instruments, assets 607.9 405.0
Derivative instruments, liabilities 147.3 119.8
Credit contracts | Derivatives not designated as hedging instruments    
Derivatives, fair value disclosures    
Derivative instruments, assets 3.2 17.4
Derivative instruments, liabilities 17.0 1.0
Other contracts | Derivatives not designated as hedging instruments    
Derivatives, fair value disclosures    
Derivative instruments, liabilities $ (1,961.5) $ (2,436.1)