XML 108 R96.htm IDEA: XBRL DOCUMENT v3.24.2
Market Risk Benefits - Net Asset (Liability) Balances and Changes in Valuation of MRBs for Asia - Guaranteed Pension (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Net asset (liability) balances and the changes in the valuation of the MRBs    
Balance at beginning of period, market risk benefits $ 20.2  
Balance at end of period, market risk benefits 143.0 $ 20.2
Principal Asset Management | Principal International | Guaranteed pension | Asia    
Net asset (liability) balances and the changes in the valuation of the MRBs    
Balance at beginning of period, market risk benefits (21.3) (26.0)
Effect of changes in nonperformance risk at beginning of period 1.0 1.2
Adjusted balance at beginning of period, market risk benefits (20.3) (24.8)
Interest accrual and expected policyholder behavior (0.2) (10.1)
Benefit payments 20.2 13.8
Changes in interest rates (0.6) 1.2
Changes in equity markets 0.7 0.2
Actual policyholder behavior different from expected behavior $ 0.2 (0.6)
Adjusted balance at end of period, market risk benefits   (20.3)
Effect of changes in nonperformance risk at end of period   1.0
Balance at end of period, market risk benefits   $ (21.3)
Weighted-average attained age of policyholders (years) 0 years 54 years
Net amount at risk   $ 25.1