RELATED PARTY TRANSACTIONS - Assets Received (Removed) (Details) $ in Millions	Apr. 12, 2018 USD ($)
Assets Received
Related Party Transaction [Line Items]
Related party, amount of transaction	$ 8,888
Assets Removed
Related Party Transaction [Line Items]
Related party, amount of transaction	11,889
Fixed income securities | Assets Received
Related Party Transaction [Line Items]
Related party, amount of transaction	7,083
Short-term investments | Assets Received
Related Party Transaction [Line Items]
Related party, amount of transaction	205
Money market funds | Assets Received
Related Party Transaction [Line Items]
Related party, amount of transaction	2
Accrued interest | Assets Received
Related Party Transaction [Line Items]
Related party, amount of transaction	43
Derivatives | Assets Received
Related Party Transaction [Line Items]
Related party, amount of transaction	282
Cash and cash equivalents | Assets Received
Related Party Transaction [Line Items]
Related party, amount of transaction	1,273
Deferred cost of reinsurance asset | Assets Removed
Related Party Transaction [Line Items]
Related party, amount of transaction	1,839
GMDB ceded reserves | Assets Removed
Related Party Transaction [Line Items]
Related party, amount of transaction	2,317
GMIB reinsurance contract asset | Assets Removed
Related Party Transaction [Line Items]
Related party, amount of transaction	7,463
Payable to AXA RE Arizona | Assets Removed
Related Party Transaction [Line Items]
Related party, amount of transaction	$ 270