XML 72 R63.htm IDEA: XBRL DOCUMENT v3.23.3
Income Taxes (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
US Treasury Securities    
Operating Loss Carryforwards [Line Items]    
Debt securities $ 697 $ 596
Internal Revenue Service (IRS)    
Operating Loss Carryforwards [Line Items]    
Current federal income tax liability $ 24 $ 21