v3.26.1
Policyholders' account balances (Policyholder Account Balance Rollforward) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Policyholder Account Balance [Line Items]        
Balance – beginning of period $ 7,231 $ 6,748    
Policyholder Account Balance, Premium Received 688 475    
Policyholder Account Balance, Policy Charge (49) (61)    
Policyholder Account Balance, Surrender and Withdrawal (183) (168)    
Policyholder Account Balance, Benefit Payment [1] (234) (142)    
Policyholder Account Balance, Interest Expense 89 81    
Policyholder Account Balance, Increase (Decrease) from Other Change 174 81    
Balance – end of period 7,716 7,014    
Unearned Revenue Liability 772 753 $ 758 $ 711
Policyholder Account Balance, Other Reconciling Items [2] 614 577    
Policyholder Account Balance, Ending Balance 9,102 8,344    
Universal Life        
Policyholder Account Balance [Line Items]        
Balance – beginning of period 1,899 1,809    
Policyholder Account Balance, Premium Received 109 105    
Policyholder Account Balance, Policy Charge (44) (56)    
Policyholder Account Balance, Surrender and Withdrawal (68) (57)    
Policyholder Account Balance, Benefit Payment [1] (97) (19)    
Policyholder Account Balance, Interest Expense 24 24    
Policyholder Account Balance, Increase (Decrease) from Other Change 76 34    
Balance – end of period 1,899 1,840    
Policyholder Account Balance, Ending Balance $ 1,899 $ 1,840    
Policyholder Account Balance, Weighted Average Crediting Rate [3] 3.40% 3.50%    
Policyholder Account Balance, Net Amount at Risk [4] $ 10,539 $ 11,571    
Policyholder Account Balance, Cash Surrender Value 1,779 1,695    
Annuities [Member]        
Policyholder Account Balance [Line Items]        
Balance – beginning of period [5] 2,801 2,585    
Policyholder Account Balance, Premium Received [5] 130 159    
Policyholder Account Balance, Policy Charge [5] 0 0    
Policyholder Account Balance, Surrender and Withdrawal [5] (15) (17)    
Policyholder Account Balance, Benefit Payment [1],[5] (107) (77)    
Policyholder Account Balance, Interest Expense [5] 24 24    
Policyholder Account Balance, Increase (Decrease) from Other Change [5] 113 22    
Balance – end of period [5] 2,946 2,696    
Policyholder Account Balance, Net Amount at Risk [4],[6] 86 10    
Policyholder Account Balance, Cash Surrender Value [6] 1,974 1,774    
Insurance, Other        
Policyholder Account Balance [Line Items]        
Balance – beginning of period [7] 2,531 2,354    
Policyholder Account Balance, Premium Received [7] 449 211    
Policyholder Account Balance, Policy Charge [7] (5) (5)    
Policyholder Account Balance, Surrender and Withdrawal [7] (100) (94)    
Policyholder Account Balance, Benefit Payment [1],[7] (30) (46)    
Policyholder Account Balance, Interest Expense [7] 41 33    
Policyholder Account Balance, Increase (Decrease) from Other Change [7] (15) 25    
Balance – end of period [7] 2,871 2,478    
Policyholder Account Balance, Ending Balance $ 2,871 $ 2,478    
Policyholder Account Balance, Weighted Average Crediting Rate [3] 3.40% 3.30%    
Policyholder Account Balance, Net Amount at Risk [4] $ 340 $ 378    
Policyholder Account Balance, Cash Surrender Value $ 2,549 $ 2,175    
[1] Includes payments for survival and death benefits.
[2] Primarily comprises unpaid dividends on certain participating policies.
[3] Calculated using actual interest credited for the six months ended June 30, 2026 and 2025, respectively.
[4] For those guarantees of benefits that are payable in the event of death, the net amount at risk is defined as the current guaranteed minimum death benefit in excess of the current account balance at the balance sheet date.
[5] Relates to Huatai Life.
[6] Annuities do not have an explicit account balance, therefore a crediting rate is not applicable.
[7] Primarily comprises policyholder account balances related to investment linked products including endowment and investment contracts, none of which bear significant insurance risk.