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REINSURANCE - SCHEDULE OF EFFECT OF REINSURANCE (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Reinsurance Disclosures [Abstract]      
Direct policy charges and fee income $ 243 $ 249 $ 207
Reinsurance assumed 0 0 0
Reinsurance ceded (63) (61) (54)
Policy charges and fee income 180 188 153
Direct premiums 59 38 39
Reinsurance assumed 3 3 1
Reinsurance ceded (39) (37) (39)
Premiums 23 4 1
Direct policyholders' benefits 163 139 189
Reinsurance assumed 1 2 1
Reinsurance ceded (110) (112) (149)
Policyholders' benefits $ 54 $ 29 $ 41