v3.26.1
Business Segment Reporting - Total Assets By Segment (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Segment Reporting [Line Items]    
Total assets $ 37,316,763 $ 30,733,298
Continuing Operations    
Segment Reporting [Line Items]    
Total assets 37,316,763 30,733,298
Operating segments | Continuing Operations    
Segment Reporting [Line Items]    
Total assets 37,204,174 30,673,119
Operating segments | Retirement Solutions | Continuing Operations    
Segment Reporting [Line Items]    
Total assets 162,013 214,601
Operating segments | Portfolio Management | Continuing Operations    
Segment Reporting [Line Items]    
Total assets 37,042,161 30,458,518
Corporate and Other | Continuing Operations    
Segment Reporting [Line Items]    
Total assets $ 112,589 $ 60,179