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	Jun. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 23,106	$ 22,127
Net Derivatives Fair Value	1,421	305
Asset derivatives fair value	1,963	676
Liability Derivatives Fair Value	(542)	(371)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	18,388	11,413
Net Derivatives Fair Value	1,963	676
Asset derivatives fair value	1,963	676
Liability Derivatives Fair Value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	4,718	10,714
Net Derivatives Fair Value	(542)	(371)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(542)	(371)
Foreign currency swaps
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	492	563
Liability Derivatives Fair Value	(396)	(314)
Foreign currency forwards
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	1,459	107
Liability Derivatives Fair Value	(93)	(49)
Foreign currency options
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	11	5
Liability Derivatives Fair Value	(53)	(8)
Credit default swaps
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	1	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	14,602	14,330
Net Derivatives Fair Value	1,448	45
Asset derivatives fair value	1,449	88
Liability Derivatives Fair Value	(1)	(43)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	12,917	13,080
Net Derivatives Fair Value	1,442	45
Asset derivatives fair value	1,442	88
Liability Derivatives Fair Value	0	(43)
Fair value hedges | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,685	1,250
Net Derivatives Fair Value	6	0
Asset derivatives fair value	7	0
Liability Derivatives Fair Value	(1)	0
Net investment hedge
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,556	1,029
Net Derivatives Fair Value	(141)	10
Asset derivatives fair value	4	24
Liability Derivatives Fair Value	(145)	(14)
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	846	763
Net Derivatives Fair Value	(93)	13
Asset derivatives fair value	0	19
Liability Derivatives Fair Value	(93)	(6)
Net investment hedge | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	710	266
Net Derivatives Fair Value	(48)	(3)
Asset derivatives fair value	4	5
Liability Derivatives Fair Value	(52)	(8)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,873	6,693
Net Derivatives Fair Value	115	265
Asset derivatives fair value	509	564
Liability Derivatives Fair Value	(394)	(299)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,669	6,599
Net Derivatives Fair Value	97	264
Asset derivatives fair value	491	563
Liability Derivatives Fair Value	(394)	(299)
Non-qualifying strategies | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	107	11
Net Derivatives Fair Value	17	0
Asset derivatives fair value	17	0
Liability Derivatives Fair Value	0	0
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	97	83
Net Derivatives Fair Value	1	1
Asset derivatives fair value	1	1
Liability Derivatives Fair Value	$ 0	$ 0