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	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 39,238	$ 22,127
Net Derivatives Fair Value	1,061	305
Asset derivatives fair value	1,662	676
Liability Derivatives Fair Value	(601)	(371)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	25,019	11,413
Net Derivatives Fair Value	1,662	676
Asset derivatives fair value	1,662	676
Liability Derivatives Fair Value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	14,219	10,714
Net Derivatives Fair Value	(601)	(371)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(601)	(371)
Foreign currency swaps
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	460	563
Liability Derivatives Fair Value	(436)	(314)
Foreign currency forwards
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	1,189	107
Liability Derivatives Fair Value	(109)	(49)
Foreign currency options
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	10	5
Liability Derivatives Fair Value	(56)	(8)
Credit default swaps
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	3	1
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(1)	(15)
Asset derivatives fair value	1	0
Liability Derivatives Fair Value	(2)	(15)
Cash flow hedges | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(1)	(15)
Asset derivatives fair value	1	0
Liability Derivatives Fair Value	(2)	(15)
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	17,694	14,330
Net Derivatives Fair Value	588	45
Asset derivatives fair value	631	88
Liability Derivatives Fair Value	(43)	(43)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	15,579	13,080
Net Derivatives Fair Value	586	45
Asset derivatives fair value	627	88
Liability Derivatives Fair Value	(41)	(43)
Fair value hedges | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	2,115	1,250
Net Derivatives Fair Value	2	0
Asset derivatives fair value	4	0
Liability Derivatives Fair Value	(2)	0
Net investment hedge
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,118	1,029
Net Derivatives Fair Value	(85)	10
Asset derivatives fair value	6	24
Liability Derivatives Fair Value	(91)	(14)
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	292	763
Net Derivatives Fair Value	(37)	13
Asset derivatives fair value	0	19
Liability Derivatives Fair Value	(37)	(6)
Net investment hedge | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	826	266
Net Derivatives Fair Value	(48)	(3)
Asset derivatives fair value	6	5
Liability Derivatives Fair Value	(54)	(8)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	20,351	6,693
Net Derivatives Fair Value	559	265
Asset derivatives fair value	1,024	564
Liability Derivatives Fair Value	(465)	(299)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,687	6,599
Net Derivatives Fair Value	25	264
Asset derivatives fair value	459	563
Liability Derivatives Fair Value	(434)	(299)
Non-qualifying strategies | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	13,565	11
Net Derivatives Fair Value	531	0
Asset derivatives fair value	562	0
Liability Derivatives Fair Value	(31)	0
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	99	83
Net Derivatives Fair Value	3	1
Asset derivatives fair value	3	1
Liability Derivatives Fair Value	$ 0	$ 0