v3.25.2
Investments - Repurchase Agreement, Securities Lending, VIEs (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Available-for-sale Securities Including Securities Pledged [Line Items]    
Initial collateral required, percent of market value of loaned securities 102.00%  
Payables under securities loan and repurchase agreements, including collateral held $ 692 $ 897
Cash collateral, included in Payables    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Securities received as collateral 552 581
U.S. Treasuries    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held 22 7
U.S. corporate public securities    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held 338 461
Short-term Investments    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held 48 216
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 153 217
Payables under securities loan agreements    
Available-for-sale Securities Including Securities Pledged [Line Items]    
Payables under securities loan and repurchase agreements, including collateral held $ 561 $ 901