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	Sep. 30, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 9,199	$ 5,491
Net Derivatives Fair Value	(63)	(156)
Asset Derivatives Fair Value	384	375
Liability Derivatives Fair Value	(447)	(531)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,281	1,794
Net Derivatives Fair Value	384	375
Asset Derivatives Fair Value	384	375
Liability Derivatives Fair Value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	3,918	3,697
Net Derivatives Fair Value	(447)	(531)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(447)	(531)
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	146	146
Net Derivatives Fair Value	30	36
Asset Derivatives Fair Value	30	36
Liability Derivatives Fair Value	0	0
Cash flow hedges | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	71	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	30	36
Asset Derivatives Fair Value	30	36
Liability Derivatives Fair Value	0	0
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	2,502
Net Derivatives Fair Value	17
Asset Derivatives Fair Value	17
Liability Derivatives Fair Value	0
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	2,502
Net Derivatives Fair Value	17
Asset Derivatives Fair Value	17
Liability Derivatives Fair Value	0
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,551	5,345
Net Derivatives Fair Value	(110)	(192)
Asset Derivatives Fair Value	337	339
Liability Derivatives Fair Value	(447)	(531)
Non-qualifying strategies | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	382	381
Net Derivatives Fair Value	34	30
Asset Derivatives Fair Value	39	34
Liability Derivatives Fair Value	(5)	(4)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,787	4,583
Net Derivatives Fair Value	(62)	(92)
Asset Derivatives Fair Value	298	305
Liability Derivatives Fair Value	(360)	(397)
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	382	381
Net Derivatives Fair Value	(82)	(130)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	$ (82)	$ (130)