XML 155 R127.htm IDEA: XBRL DOCUMENT v3.24.0.1
REINSURANCE - Ceded Reinsurance (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Estimated net fair values of purchased market risk benefits $ 9,427 $ 10,423
Third-party reinsurance recoverables related to insurance contracts 8,352 8,471
Amount due to reinsurers 1,450 1,533
Top reinsurers 1,450 1,533
Ceded group health reserves    
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Reinsurance recoverables related to insurance contracts 56 47
Reinsurance assumed reserves 731 701
MRB    
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Increase (decrease) estimated net fair values of purchased market risk benefits (996) (3,700)
First Allmerica-GAF    
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Reinsurance recoverables related to insurance contracts 3,606 4,005
Top reinsurers 73 147
Zurich Life Insurance Company, Ltd.    
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Reinsurance recoverables related to insurance contracts 1,326 1,416
RGA Reinsurance Company    
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Reinsurance recoverables related to insurance contracts 1,228 1,272
Top reinsurers 1,151 1,171
Protective Life Insurance Company    
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]    
Top reinsurers $ 99 $ 104