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	Dec. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 22,127	$ 23,662
Net Derivatives Fair Value	305	(1,621)
Asset Derivatives Fair Value	676	802
Liability Derivatives Fair Value	(371)	(2,423)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	11,413	6,531
Net Derivatives Fair Value	676	802
Asset Derivatives Fair Value	676	802
Liability Derivatives Fair Value	0	0
Other Liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	10,714	17,131
Net Derivatives Fair Value	(371)	(2,423)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(371)	(2,423)
Foreign currency swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	563	746
Liability Derivatives Fair Value	(314)	(318)
Foreign currency forwards
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	107	56
Liability Derivatives Fair Value	(49)	(1,912)
Foreign currency options
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	5
Liability Derivatives Fair Value	(8)	(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	(15)	(15)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(15)	(15)
Cash flow hedges | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(15)	(15)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(15)	(15)
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	14,330	15,587
Net Derivatives Fair Value	45	(1,982)
Asset Derivatives Fair Value	88	0
Liability Derivatives Fair Value	(43)	(1,982)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	13,080	12,388
Net Derivatives Fair Value	45	(1,791)
Asset Derivatives Fair Value	88	0
Liability Derivatives Fair Value	(43)	(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	1,029	1,307
Net Derivatives Fair Value	10	54
Asset Derivatives Fair Value	24	56
Liability Derivatives Fair Value	(14)	(2)
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	763	1,307
Net Derivatives Fair Value	13	54
Asset Derivatives Fair Value	19	56
Liability Derivatives Fair Value	(6)	(2)
Net investment hedge | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	266
Net Derivatives Fair Value	(3)
Asset Derivatives Fair Value	5
Liability Derivatives Fair Value	(8)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,693	6,693
Net Derivatives Fair Value	265	322
Asset Derivatives Fair Value	564	746
Liability Derivatives Fair Value	(299)	(424)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,599	5,765
Net Derivatives Fair Value	264	443
Asset Derivatives Fair Value	563	746
Liability Derivatives Fair Value	(299)	(303)
Non-qualifying strategies | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	11	784
Net Derivatives Fair Value	0	(119)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	0	(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	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)