v3.25.2
Investments - Carrying Amount of Equity Method Limited Partnership Interests (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Schedule of Equity Method Investments    
Limited partnership interests $ 1,137.8 $ 1,121.3
Commercial mortgage loan funds    
Schedule of Equity Method Investments    
Limited partnership interests 591.1 596.0
Real estate equity funds    
Schedule of Equity Method Investments    
Limited partnership interests 144.8 144.7
Private equity funds    
Schedule of Equity Method Investments    
Limited partnership interests 110.9 102.2
Infrastructure equity funds    
Schedule of Equity Method Investments    
Limited partnership interests 83.8 81.7
Infrastructure debt funds    
Schedule of Equity Method Investments    
Limited partnership interests 67.2 69.0
Other funds    
Schedule of Equity Method Investments    
Limited partnership interests $ 140.0 $ 127.7