v3.26.1
Investments - Repurchase Agreement, Securities Lending, VIEs (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held $ 846 $ 826
Securities received as collateral 602 575
U.S. Treasuries    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held 89 29
Debt Security, Corporate, US    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held 376 391
Short-term Investments    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held 0 13
Foreign corporate public securities and foreign governments    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held 198 156
Payables under securities loan agreements    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held $ 663 $ 589