XML 131 R120.htm IDEA: XBRL DOCUMENT v3.23.3
Future Policy Benefits - Additional Information, Cohort NPR (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Insurance [Abstract]    
Net Premium Ratio before capping 100.00% 100.00%
Reserves before NP Ratio capping $ 1,117 $ 1,172
Reserves after NP Ratio capping 1,117 1,173
Loss Expense $ 0 $ 0