XML 38 R27.htm IDEA: XBRL DOCUMENT v3.23.1
Investments - Additional Information (Details)
$ in Millions
Apr. 01, 2023
USD ($)
AFS_security
Dec. 31, 2022
USD ($)
Debt Securities, Available-for-Sale, Unrealized Gain (Loss) [Abstract]    
Number of debt securities issues contributing to total unrealized losses | AFS_security 448  
Total, Unrealized Losses | $ $ 707 $ 834