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	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 13,370	$ 5,491
Net Derivatives Fair Value	(589)	(156)
Asset Derivatives Fair Value	345	375
Liability Derivatives Fair Value	(934)	(531)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	2,585	1,794
Net Derivatives Fair Value	345	375
Asset Derivatives Fair Value	345	375
Liability Derivatives Fair Value	0	0
Other Liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	10,785	3,697
Net Derivatives Fair Value	(934)	(531)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(934)	(531)
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	139	146
Net Derivatives Fair Value	14	36
Asset Derivatives Fair Value	14	36
Liability Derivatives Fair Value	0	0
Cash flow hedges | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	64	71
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	14	36
Asset Derivatives Fair Value	14	36
Liability Derivatives Fair Value	0	0
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,944
Net Derivatives Fair Value	(535)
Asset Derivatives Fair Value	0
Liability Derivatives Fair Value	(535)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,944
Net Derivatives Fair Value	(535)
Asset Derivatives Fair Value	0
Liability Derivatives Fair Value	(535)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,287	5,345
Net Derivatives Fair Value	(68)	(192)
Asset Derivatives Fair Value	331	339
Liability Derivatives Fair Value	(399)	(531)
Non-qualifying strategies | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	355	381
Net Derivatives Fair Value	29	30
Asset Derivatives Fair Value	32	34
Liability Derivatives Fair Value	(3)	(4)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,577	4,583
Net Derivatives Fair Value	(32)	(92)
Asset Derivatives Fair Value	297	305
Liability Derivatives Fair Value	(329)	(397)
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	355	381
Net Derivatives Fair Value	(65)	(130)
Asset Derivatives Fair Value	2	0
Liability Derivatives Fair Value	$ (67)	$ (130)