DERIVATIVE INSTRUMENTS - Summary of Balance Sheet Classification of Derivative Fair Value Amounts, as well as Gross Asset and Liability Fair Value Amounts (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 22,158	$ 22,127
Net Derivatives Fair Value	812	305
Asset derivatives fair value	1,144	676
Liability Derivatives Fair Value	(332)	(371)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	16,012	11,413
Net Derivatives Fair Value	1,144	676
Asset derivatives fair value	1,144	676
Liability Derivatives Fair Value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,146	10,714
Net Derivatives Fair Value	(332)	(371)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(332)	(371)
Foreign currency swaps
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	493	563
Liability Derivatives Fair Value	(272)	(314)
Foreign currency forwards
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	644	107
Liability Derivatives Fair Value	(36)	(49)
Foreign currency options
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	5	5
Liability Derivatives Fair Value	(24)	(8)
Credit default swaps
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	2	1
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(10)	(15)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(10)	(15)
Cash flow hedges | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(10)	(15)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(10)	(15)
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	14,196	14,330
Net Derivatives Fair Value	628	45
Asset derivatives fair value	636	88
Liability Derivatives Fair Value	(8)	(43)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	12,711	13,080
Net Derivatives Fair Value	629	45
Asset derivatives fair value	635	88
Liability Derivatives Fair Value	(6)	(43)
Fair value hedges | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,485	1,250
Net Derivatives Fair Value	(1)	0
Asset derivatives fair value	1	0
Liability Derivatives Fair Value	(2)	0
Net investment hedge
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,157	1,029
Net Derivatives Fair Value	(43)	10
Asset derivatives fair value	9	24
Liability Derivatives Fair Value	(52)	(14)
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	773	763
Net Derivatives Fair Value	(25)	13
Asset derivatives fair value	5	19
Liability Derivatives Fair Value	(30)	(6)
Net investment hedge | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	384	266
Net Derivatives Fair Value	(18)	(3)
Asset derivatives fair value	4	5
Liability Derivatives Fair Value	(22)	(8)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,730	6,693
Net Derivatives Fair Value	237	265
Asset derivatives fair value	499	564
Liability Derivatives Fair Value	(262)	(299)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,580	6,599
Net Derivatives Fair Value	231	264
Asset derivatives fair value	493	563
Liability Derivatives Fair Value	(262)	(299)
Non-qualifying strategies | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	61	11
Net Derivatives Fair Value	4	0
Asset derivatives fair value	4	0
Liability Derivatives Fair Value	0	0
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	89	83
Net Derivatives Fair Value	2	1
Asset derivatives fair value	2	1
Liability Derivatives Fair Value	$ 0	$ 0