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, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 25,869	$ 23,662
Net Derivatives Fair Value	250	(1,621)
Asset derivatives fair value	752	802
Liability Derivatives Fair Value	(502)	(2,423)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	13,372	6,531
Net Derivatives Fair Value	752	802
Asset derivatives fair value	752	802
Liability Derivatives Fair Value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	12,497	17,131
Net Derivatives Fair Value	(502)	(2,423)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(502)	(2,423)
Foreign currency swaps
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	609	746
Liability Derivatives Fair Value	(326)	(318)
Foreign currency forwards
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	142	56
Liability Derivatives Fair Value	(176)	(1,912)
Foreign currency options
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value		(33)
Credit default swaps
Derivatives, Fair Value [Line Items]
Asset derivatives fair value	1
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	(17)	(15)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(17)	(15)
Cash flow hedges | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(17)	(15)
Asset derivatives fair value	0	0
Liability Derivatives Fair Value	(17)	(15)
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	14,230	15,587
Net Derivatives Fair Value	(114)	(1,982)
Asset derivatives fair value	54	0
Liability Derivatives Fair Value	(168)	(1,982)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	12,980	12,388
Net Derivatives Fair Value	(114)	(1,791)
Asset derivatives fair value	54	0
Liability Derivatives Fair Value	(168)	(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	0	0
Liability Derivatives Fair Value	0	(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	1,997	1,307
Net Derivatives Fair Value	81	54
Asset derivatives fair value	85	56
Liability Derivatives Fair Value	(4)	(2)
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,997	1,307
Net Derivatives Fair Value	81	54
Asset derivatives fair value	85	56
Liability Derivatives Fair Value	(4)	(2)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	9,567	6,693
Net Derivatives Fair Value	300	322
Asset derivatives fair value	613	746
Liability Derivatives Fair Value	(313)	(424)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,586	5,765
Net Derivatives Fair Value	300	443
Asset derivatives fair value	609	746
Liability Derivatives Fair Value	(309)	(303)
Non-qualifying strategies | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	2,899	784
Net Derivatives Fair Value	(1)	(119)
Asset derivatives fair value	3	0
Liability Derivatives Fair Value	(4)	(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	82	83
Net Derivatives Fair Value	1	0
Asset derivatives fair value	1	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)