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	Jun. 30, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 6,056	$ 5,491
Net Derivatives Fair Value	(176)	(156)
Asset Derivatives Fair Value	306	375
Liability Derivatives Fair Value	(482)	(531)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	2,461	1,794
Net Derivatives Fair Value	306	375
Asset Derivatives Fair Value	306	375
Liability Derivatives Fair Value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	3,595	3,697
Net Derivatives Fair Value	(482)	(531)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(482)	(531)
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	145	146
Net Derivatives Fair Value	28	36
Asset Derivatives Fair Value	28	36
Liability Derivatives Fair Value	0	0
Cash flow hedges | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	70	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	28	36
Asset Derivatives Fair Value	28	36
Liability Derivatives Fair Value	0	0
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,911	5,345
Net Derivatives Fair Value	(204)	(192)
Asset Derivatives Fair Value	278	339
Liability Derivatives Fair Value	(482)	(531)
Non-qualifying strategies | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	367	381
Net Derivatives Fair Value	27	30
Asset Derivatives Fair Value	31	34
Liability Derivatives Fair Value	(4)	(4)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,177	4,583
Net Derivatives Fair Value	(124)	(92)
Asset Derivatives Fair Value	247	305
Liability Derivatives Fair Value	(371)	(397)
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	367	381
Net Derivatives Fair Value	(107)	(130)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	$ (107)	$ (130)