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, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 6,028	$ 5,491
Net Derivatives Fair Value	(110)	(156)
Asset Derivatives Fair Value	318	375
Liability Derivatives Fair Value	(428)	(531)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	2,436	1,794
Net Derivatives Fair Value	318	375
Asset Derivatives Fair Value	318	375
Liability Derivatives Fair Value	0	0
Other Liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	3,592	3,697
Net Derivatives Fair Value	(428)	(531)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(428)	(531)
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	142	146
Net Derivatives Fair Value	24	36
Asset Derivatives Fair Value	24	36
Liability Derivatives Fair Value	0	0
Cash flow hedges | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	67	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	24	36
Asset Derivatives Fair Value	24	36
Liability Derivatives Fair Value	0	0
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,886	5,345
Net Derivatives Fair Value	(134)	(192)
Asset Derivatives Fair Value	294	339
Liability Derivatives Fair Value	(428)	(531)
Non-qualifying strategies | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	367	381
Net Derivatives Fair Value	28	30
Asset Derivatives Fair Value	31	34
Liability Derivatives Fair Value	(3)	(4)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,152	4,583
Net Derivatives Fair Value	(65)	(92)
Asset Derivatives Fair Value	263	305
Liability Derivatives Fair Value	(328)	(397)
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	367	381
Net Derivatives Fair Value	(97)	(130)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	$ (97)	$ (130)