v3.26.1
Market risk benefits (MRB Roll-Forward) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Market Risk Benefit [Line Items]        
Market risk benefits gains (losses) $ 5 $ (17) $ 19 $ (109)
Long-Duration Insurance, Other | Variable Annuity        
Market Risk Benefit [Line Items]        
Balance - beginning of period     659 607
Balance, beginning of period, before effect of changes in the instrument-specific credit risk     636 592
Interest rate changes     (22) 41
Effect of market movements (1) [1]     (78) (50)
Effect of changes in volatilities     (2) 19
Actual policyholder behavior different from expected behavior     9 28
Effect of timing and all other     (48) (31)
Balance, end of period, before effect of changes in the instrument-specific credit risk 495 599 495 599
Effect of changes in the instrument-specific credit risk 10 10 10 10
Balance - end of period 505 609 505 609
Market Risk Benefit, Net Amount at Risk [2] $ 1,189 $ 1,479 1,189 1,479
Market Risk Benefits Other Gains (Losses)     $ (121) $ (103)
Weighted-average age of policyholders (years)     75 years 74 years
[1] Market movements are predominantly driven by changes in equities.
[2] The net amount at risk is defined as the present value of future claim payments assuming policy account values and guaranteed values are fixed at the valuation date, and reinsurance coverage ends at the earlier of the maturity of the underlying variable annuity policy or the reinsurance treaty. No withdrawals, lapses, and mortality improvements are assumed in the projection. GLB-related risks contain conservative mortality and annuitization assumptions.