v3.26.3
Revenues from Contracts with Customers - Disaggregation within Segments, Benefits and Protection, Life Insurance (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total fees and other revenues $ 1,144.1 $ 1,128.7 $ 3,407.4 $ 3,289.0
Premiums and other considerations 1,897.9 1,532.8 4,506.8 4,680.6
Net investment income 1,160.8 1,200.5 3,661.6 3,529.0
Operating Segments        
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total revenues from contracts with customers 752.4 779.8 2,309.3 2,275.6
Operating Segments | Benefits and Protection        
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total revenues from contracts with customers 15.4 27.0 46.2 78.5
Operating Segments | Benefits and Protection | Life Insurance        
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total revenues from contracts with customers 12.2 23.1 35.7 66.9
Fees and other revenues not within the scope of revenue recognition guidance 95.8 89.7 287.6 271.1
Total fees and other revenues 108.0 112.8 323.3 338.0
Premiums and other considerations 130.6 136.1 378.0 384.0
Net investment income 103.6 115.3 323.0 326.9
Total operating revenues 342.2 364.2 1,024.3 1,048.9
Operating Segments | Benefits and Protection | Life Insurance | Administrative service fee revenue        
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total revenues from contracts with customers $ 12.2 11.0 $ 35.7 32.8
Operating Segments | Benefits and Protection | Life Insurance | Commission income        
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total revenues from contracts with customers   $ 12.1   $ 34.1