INVESTMENTS - Investments in Consolidated Variable Interest Entities (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Other Investments, amortized cost	$ 450	$ 294
Asset derivatives	1,144	676
Assets, fair value	79,697	72,996
Liability derivatives	332	371
Liabilities	107,745	100,548
Liabilities, fair value disclosure	332	371
Variable Interest Entity, Consolidated
Variable Interest Entity [Line Items]
Securities available for sale, fixed maturities, amortized cost	4,110	3,739
Securities available for sale, fixed maturities, fair value	4,861	4,554
Securities available for sale, perpetual securities, amortized cost	244	255
Securities available for sale, perpetual securities, fair value	186	228
Available-for-sale equity securities, amortized cost basis	683	363
Available-for-sale securities, equity securities	648	363
Other Investments, amortized cost	20	0
Other investments, fair value	21	0
Asset derivative, amortized cost	114	102
Asset derivatives	114	102
Assets, amortized cost	5,171	4,459
Assets, fair value	5,830	5,247
Liability derivatives, amortized cost	175	293
Liability derivatives	175	293
Liabilities	175	293
Liabilities, fair value disclosure	$ 175	$ 293