CLOSED BLOCK (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
CLOSED BLOCK LIABILITIES:
Future policy benefits, policyholders’ account balances and other	$ 7,107	$ 7,179
Policyholder dividend obligation	38	52	$ 160	$ 81
Other liabilities	151	43
Total Closed Block liabilities	7,296	7,274
ASSETS DESIGNATED TO THE CLOSED BLOCK:
Fixed maturities, available for sale, at fair value (amortized cost of $4,162 and $3,884)	4,322	4,025
Mortgage loans on real estate	1,789	1,623
Policy loans	814	839
Cash and other invested assets	22	444
Other assets	206	181
Total assets designated to the Closed Block	7,153	7,112
Excess of Closed Block liabilities over assets designated to the Closed Block	143	162
Closed Block Assets and Liabilities, Effect on Other Comprehensive Income (Loss) [Abstract]
Net unrealized investment gains (losses), net of policyholder dividend obligation of $(38) and $(52)	132	100
Maximum Future Earnings To Be Recognized From Closed Block Assets and Liabilities	$ 275	$ 262