v3.26.3
Revenues from Contracts with Customers - Disaggregation within Segments, Principal Asset Management, International Pension (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 | Principal Asset Management        
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total revenues from contracts with customers 521.2 532.5 1,575.1 1,566.8
Operating Segments | Principal Asset Management | International Pension        
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total revenues from contracts with customers 90.6 88.7 282.9 272.5
Fees and other revenues not within the scope of revenue recognition guidance 1.0 5.7 3.0 8.4
Total fees and other revenues 91.6 94.4 285.9 280.9
Premiums and other considerations (0.1) 0.5 (0.4) 6.1
Net investment income 84.7 153.1 438.7 439.6
Total operating revenues 176.2 248.0 724.2 726.6
Operating Segments | Principal Asset Management | International Pension | Management fee revenue        
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total revenues from contracts with customers 86.7 85.2 271.2 262.0
Operating Segments | Principal Asset Management | International Pension | Other fee revenue        
Revenues from Contracts with Customers - Disaggregation of Revenues        
Total revenues from contracts with customers $ 3.9 $ 3.5 $ 11.7 $ 10.5