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, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 23,356	$ 23,662
Net Derivatives Fair Value	493	(1,621)
Asset derivatives fair value	877	802
Liability Derivatives Fair Value	(384)	(2,423)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	16,776	6,531
Net Derivatives Fair Value	877	802
Asset derivatives fair value	877	802
Liability Derivatives Fair Value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,580	17,131
Net Derivatives Fair Value	(384)	(2,423)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(384)	(2,423)
Foreign currency swaps
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	604	746
Liability Derivatives Fair Value	(352)	(318)
Foreign currency forwards
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	268	56
Liability Derivatives Fair Value	(24)	(1,912)
Foreign currency options
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	5
Liability Derivatives Fair Value	(8)	(33)
Interest rate swaptions
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value		(160)
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(18)	(15)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(18)	(15)
Cash flow hedges | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(18)	(15)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(18)	(15)
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	13,964	15,587
Net Derivatives Fair Value	239	(1,982)
Asset derivatives fair value	249	0
Liability Derivatives Fair Value	(10)	(1,982)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	12,714	12,388
Net Derivatives Fair Value	239	(1,791)
Asset derivatives fair value	248	0
Liability Derivatives Fair Value	(9)	(1,791)
Fair value hedges | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,250	697
Net Derivatives Fair Value	0	(32)
Asset derivatives fair value	1	0
Liability Derivatives Fair Value	(1)	(32)
Fair value hedges | Interest rate swaptions
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount		2,502
Net Derivatives Fair Value		(159)
Asset derivatives fair value		0
Liability Derivatives Fair Value		(159)
Net investment hedge
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,623	1,307
Net Derivatives Fair Value	2	54
Asset derivatives fair value	23	56
Liability Derivatives Fair Value	(21)	(2)
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,455	1,307
Net Derivatives Fair Value	5	54
Asset derivatives fair value	19	56
Liability Derivatives Fair Value	(14)	(2)
Net investment hedge | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	168
Net Derivatives Fair Value	(3)
Asset derivatives fair value	4
Liability Derivatives Fair Value	(7)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	7,694	6,693
Net Derivatives Fair Value	270	322
Asset derivatives fair value	605	746
Liability Derivatives Fair Value	(335)	(424)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,604	5,765
Net Derivatives Fair Value	270	443
Asset derivatives fair value	604	746
Liability Derivatives Fair Value	(334)	(303)
Non-qualifying strategies | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,007	784
Net Derivatives Fair Value	0	(119)
Asset derivatives fair value	1	0
Liability Derivatives Fair Value	(1)	(119)
Non-qualifying strategies | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount		53
Net Derivatives Fair Value		(1)
Asset derivatives fair value		0
Liability Derivatives Fair Value		(1)
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	83	83
Net Derivatives Fair Value	0	0
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	$ 0	0
Non-qualifying strategies | Interest rate swaptions
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount		8
Net Derivatives Fair Value		(1)
Asset derivatives fair value		0
Liability Derivatives Fair Value		$ (1)