v3.25.4
Cash and Investments - Assets pledged to third parties (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Assets pledged to third parties    
Cash and Investments    
Financial assets pledged as collateral $ 9,695.2 $ 8,523.9
Regulatory deposits    
Cash and Investments    
Financial assets pledged as collateral 7,817.8 6,714.4
Security for reinsurance and other    
Cash and Investments    
Financial assets pledged as collateral $ 1,877.4 $ 1,809.5