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, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 15,085	$ 13,370
Net Derivatives Fair Value	(213)	(589)
Asset Derivatives Fair Value	430	345
Liability Derivatives Fair Value	(643)	(934)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	4,831	2,585
Net Derivatives Fair Value	430	345
Asset Derivatives Fair Value	430	345
Liability Derivatives Fair Value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	10,254	10,785
Net Derivatives Fair Value	(643)	(934)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(643)	(934)
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	133	139
Net Derivatives Fair Value	7	14
Asset Derivatives Fair Value	7	14
Liability Derivatives Fair Value	0	0
Cash flow hedges | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	58	64
Net Derivatives Fair Value	0	0
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	0	0
Cash flow hedges | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	7	14
Asset Derivatives Fair Value	7	14
Liability Derivatives Fair Value	0	0
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	8,661	6,944
Net Derivatives Fair Value	(253)	(535)
Asset Derivatives Fair Value	19	0
Liability Derivatives Fair Value	(272)	(535)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	8,661	6,944
Net Derivatives Fair Value	(253)	(535)
Asset Derivatives Fair Value	19	0
Liability Derivatives Fair Value	(272)	(535)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,291	6,287
Net Derivatives Fair Value	33	(68)
Asset Derivatives Fair Value	404	331
Liability Derivatives Fair Value	(371)	(399)
Non-qualifying strategies | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	336	355
Net Derivatives Fair Value	25	29
Asset Derivatives Fair Value	26	32
Liability Derivatives Fair Value	(1)	(3)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,352	5,577
Net Derivatives Fair Value	60	(32)
Asset Derivatives Fair Value	374	297
Liability Derivatives Fair Value	(314)	(329)
Non-qualifying strategies | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	266
Net Derivatives Fair Value	2
Asset Derivatives Fair Value	2
Liability Derivatives Fair Value	0
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	337	355
Net Derivatives Fair Value	(54)	(65)
Asset Derivatives Fair Value	2	2
Liability Derivatives Fair Value	$ (56)	$ (67)