v3.26.1
Future policy benefits (Rollforward) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Liability for Future Policy Benefit, Activity [Line Items]      
Deferred profit liability $ 3,111 $ 2,132  
Net liability for future policy benefits, before reinsurance recoverable 20,159 18,018 $ 18,420
Reinsurance recoverable on policy benefits [1] 333   $ 286
Segment Life [Member]      
Liability for Future Policy Benefit, Activity [Line Items]      
Balance – beginning of period 18,407 17,679  
Beginning balance at original discount rate 18,518 17,745  
Effect of changes in cash flow assumptions 0 9  
Effect of actual variances from expected experience (240) (152)  
Adjusted beginning of period balance 18,278 17,602  
Issuances 2,567 2,253  
Interest accrual 393 356  
Net premiums collected (1) [2] (2,036) (1,713)  
Other (including foreign exchange) (105) 656  
Ending balance at original discount rate 19,097 19,154  
Effect of changes in discount rate assumptions (559) 33  
Balance – end of period 18,538 19,187  
Balance – beginning of period 32,775 30,635  
Beginning balance at original discount rate 32,551 30,142  
Effect of changes in cash flow assumptions 0 12  
Effect of actual variances from expected experience (238) (150)  
Adjusted beginning of period balance 32,313 30,004  
Issuances 2,567 2,253  
Interest accrual 634 558  
Benefits payments (1,163) (1,138)  
Other (including foreign exchange) (67) 1,005  
Ending balance at original discount rate 34,284 32,682  
Effect of changes in discount rate assumptions (463) 842  
Balance – end of period 33,821 33,524  
Net liability for future policy benefits 15,283 14,337  
Deferred profit liability 3,111 2,132  
Net liability for future policy benefits, before reinsurance recoverable 18,394 16,469  
Reinsurance recoverable on policy benefits 288 275  
Net liability for future policy benefits, after reinsurance recoverable $ 18,106 $ 16,194  
Weighted average duration (years) 21 years 8 months 12 days 22 years  
Other Segments      
Liability for Future Policy Benefit, Activity [Line Items]      
Net liability for future policy benefits, before reinsurance recoverable [3] $ 1,765 $ 1,549  
Term Life Insurance | Segment Life [Member]      
Liability for Future Policy Benefit, Activity [Line Items]      
Balance – beginning of period 1,544 1,523  
Beginning balance at original discount rate 1,814 1,819  
Effect of changes in cash flow assumptions 0 0  
Effect of actual variances from expected experience (9) (4)  
Adjusted beginning of period balance 1,805 1,815  
Issuances 127 116  
Interest accrual 31 26  
Net premiums collected (1) [2] (126) (122)  
Other (including foreign exchange) (14) 59  
Ending balance at original discount rate 1,823 1,894  
Effect of changes in discount rate assumptions (258) (296)  
Balance – end of period 1,565 1,598  
Balance – beginning of period 2,313 2,238  
Beginning balance at original discount rate 2,715 2,647  
Effect of changes in cash flow assumptions 0 0  
Effect of actual variances from expected experience (3) (1)  
Adjusted beginning of period balance 2,712 2,646  
Issuances 127 116  
Interest accrual 42 36  
Benefits payments (115) (110)  
Other (including foreign exchange) (21) 88  
Ending balance at original discount rate 2,745 2,776  
Effect of changes in discount rate assumptions (403) (432)  
Balance – end of period 2,342 2,344  
Net liability for future policy benefits 777 746  
Deferred profit liability 320 306  
Net liability for future policy benefits, before reinsurance recoverable 1,097 1,052  
Reinsurance recoverable on policy benefits 110 107  
Net liability for future policy benefits, after reinsurance recoverable $ 987 $ 945  
Weighted average duration (years) 11 years 3 months 18 days 10 years 4 months 24 days  
Whole Life Insurance | Segment Life [Member]      
Liability for Future Policy Benefit, Activity [Line Items]      
Balance – beginning of period $ 4,749 $ 4,405  
Beginning balance at original discount rate 4,616 4,303  
Effect of changes in cash flow assumptions 0 (4)  
Effect of actual variances from expected experience 50 18  
Adjusted beginning of period balance 4,666 4,317  
Issuances 904 719  
Interest accrual 73 65  
Net premiums collected (1) [2] (949) (743)  
Other (including foreign exchange) 11 134  
Ending balance at original discount rate 4,705 4,492  
Effect of changes in discount rate assumptions 74 142  
Balance – end of period 4,779 4,634  
Balance – beginning of period 13,791 12,057  
Beginning balance at original discount rate 13,133 11,242  
Effect of changes in cash flow assumptions 0 (9)  
Effect of actual variances from expected experience 55 18  
Adjusted beginning of period balance 13,188 11,251  
Issuances 904 719  
Interest accrual 229 185  
Benefits payments (188) (154)  
Other (including foreign exchange) 129 300  
Ending balance at original discount rate 14,262 12,301  
Effect of changes in discount rate assumptions 477 1,106  
Balance – end of period 14,739 13,407  
Net liability for future policy benefits 9,960 8,773  
Deferred profit liability 2,402 1,539  
Net liability for future policy benefits, before reinsurance recoverable 12,362 10,312  
Reinsurance recoverable on policy benefits 49 46  
Net liability for future policy benefits, after reinsurance recoverable $ 12,313 $ 10,266  
Weighted average duration (years) 25 years 8 months 12 days 27 years 7 months 6 days  
Accident and Health Insurance Product Line [Member] | Segment Life [Member]      
Liability for Future Policy Benefit, Activity [Line Items]      
Balance – beginning of period $ 11,688 $ 11,626  
Beginning balance at original discount rate 11,665 11,499  
Effect of changes in cash flow assumptions 0 13  
Effect of actual variances from expected experience (288) (168)  
Adjusted beginning of period balance 11,377 11,344  
Issuances 1,180 1,107  
Interest accrual 282 260  
Net premiums collected (1) [2] (776) (755)  
Other (including foreign exchange) (114) 459  
Ending balance at original discount rate 11,949 12,415  
Effect of changes in discount rate assumptions (377) 184  
Balance – end of period 11,572 12,599  
Balance – beginning of period 15,587 15,693  
Beginning balance at original discount rate 15,645 15,652  
Effect of changes in cash flow assumptions 0 21  
Effect of actual variances from expected experience (298) (170)  
Adjusted beginning of period balance 15,347 15,503  
Issuances 1,180 1,107  
Interest accrual 345 325  
Benefits payments (847) (864)  
Other (including foreign exchange) (202) 601  
Ending balance at original discount rate 15,823 16,672  
Effect of changes in discount rate assumptions (564) 109  
Balance – end of period 15,259 16,781  
Net liability for future policy benefits 3,687 4,182  
Deferred profit liability 248 219  
Net liability for future policy benefits, before reinsurance recoverable 3,935 4,401  
Reinsurance recoverable on policy benefits 128 121  
Net liability for future policy benefits, after reinsurance recoverable $ 3,807 $ 4,280  
Weighted average duration (years) 10 years 1 month 6 days 10 years  
Insurance, Other | Segment Life [Member]      
Liability for Future Policy Benefit, Activity [Line Items]      
Balance – beginning of period $ 426 $ 125  
Beginning balance at original discount rate 423 124  
Effect of changes in cash flow assumptions 0 0  
Effect of actual variances from expected experience 7 2  
Adjusted beginning of period balance 430 126  
Issuances 356 311  
Interest accrual 7 5  
Net premiums collected (1) [2] (185) (93)  
Other (including foreign exchange) 12 4  
Ending balance at original discount rate 620 353  
Effect of changes in discount rate assumptions 2 3  
Balance – end of period 622 356  
Balance – beginning of period 1,084 647  
Beginning balance at original discount rate 1,058 601  
Effect of changes in cash flow assumptions 0 0  
Effect of actual variances from expected experience 8 3  
Adjusted beginning of period balance 1,066 604  
Issuances 356 311  
Interest accrual 18 12  
Benefits payments (13) (10)  
Other (including foreign exchange) 27 16  
Ending balance at original discount rate 1,454 933  
Effect of changes in discount rate assumptions 27 59  
Balance – end of period 1,481 992  
Net liability for future policy benefits 859 636  
Deferred profit liability 141 68  
Net liability for future policy benefits, before reinsurance recoverable 1,000 704  
Reinsurance recoverable on policy benefits 1 1  
Net liability for future policy benefits, after reinsurance recoverable $ 999 $ 703  
Weighted average duration (years) 28 years 2 months 12 days 25 years 3 months 18 days  
[1] Net of valuation allowance for uncollectible reinsurance.
[2] Net premiums collected represent the portion of gross premiums collected from policyholders that is used to fund expected benefit.
[3] Other business principally comprises certain Overseas General Insurance accident and health (A&H) policies and certain Chubb Life Re business.