v3.26.3
Investments - Balance Sheet Offsetting, Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Financial Asset Offsetting    
Gross amount of recognized assets subject to netting agreements $ 1,826.8 $ 1,282.0
Amount of liabilities that offset the gross amount of assets subject to netting agreements not offset in statement of financial position (378.2) (331.7)
Collateral received, financial assets (1,446.5) (939.1)
Net amount of assets subject to netting agreements 2.1 11.2
Derivative assets    
Financial Asset Offsetting    
Gross amount of recognized assets subject to netting agreements 1,803.3 1,224.5
Amount of liabilities that offset the gross amount of assets subject to netting agreements not offset in statement of financial position (378.2) (331.7)
Collateral received, financial assets (1,423.0) (881.6)
Net amount of assets subject to netting agreements 2.1 11.2
Reverse repurchase agreements    
Financial Asset Offsetting    
Gross amount of recognized assets subject to netting agreements 23.5 57.5
Collateral received, financial assets $ (23.5) $ (57.5)