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, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 23,398	$ 23,662
Net Derivatives Fair Value	107	(1,621)
Asset Derivatives Fair Value	706	802
Liability Derivatives Fair Value	(599)	(2,423)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	8,388	6,531
Net Derivatives Fair Value	706	802
Asset Derivatives Fair Value	706	802
Liability Derivatives Fair Value	0	0
Other liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	15,010	17,131
Net Derivatives Fair Value	(599)	(2,423)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(599)	(2,423)
Foreign currency swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	637	746
Liability Derivatives Fair Value	(393)	(318)
Foreign currency forwards
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	64	56
Liability Derivatives Fair Value	(165)	(1,912)
Foreign currency options
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	(15)	(33)
Credit default swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	1
Interest rate swaptions
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	(26)	(160)
Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	4
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(19)	(15)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(19)	(15)
Cash flow hedges | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(19)	(15)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(19)	(15)
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	14,288	15,587
Net Derivatives Fair Value	(191)	(1,982)
Asset Derivatives Fair Value	14	0
Liability Derivatives Fair Value	(205)	(1,982)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	13,068	12,388
Net Derivatives Fair Value	(150)	(1,791)
Asset Derivatives Fair Value	14	0
Liability Derivatives Fair Value	(164)	(1,791)
Fair value hedges | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	750	697
Net Derivatives Fair Value	(15)	(32)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(15)	(32)
Fair value hedges | Interest rate swaptions
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	470	2,502
Net Derivatives Fair Value	(26)	(159)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(26)	(159)
Net investment hedge
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,311	1,307
Net Derivatives Fair Value	49	54
Asset Derivatives Fair Value	50	56
Liability Derivatives Fair Value	(1)	(2)
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,311	1,307
Net Derivatives Fair Value	49	54
Asset Derivatives Fair Value	50	56
Liability Derivatives Fair Value	(1)	(2)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	7,724	6,693
Net Derivatives Fair Value	268	322
Asset Derivatives Fair Value	642	746
Liability Derivatives Fair Value	(374)	(424)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,602	5,765
Net Derivatives Fair Value	263	443
Asset Derivatives Fair Value	637	746
Liability Derivatives Fair Value	(374)	(303)
Non-qualifying strategies | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount		784
Net Derivatives Fair Value		(119)
Asset Derivatives Fair Value		0
Liability Derivatives Fair Value		(119)
Non-qualifying strategies | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount		53
Net Derivatives Fair Value		(1)
Asset Derivatives Fair Value		0
Liability Derivatives Fair Value		(1)
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	83	83
Net Derivatives Fair Value	1	0
Asset Derivatives Fair Value	1	0
Liability Derivatives Fair Value	0	0
Non-qualifying strategies | Interest rate swaptions
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount		8
Net Derivatives Fair Value		(1)
Asset Derivatives Fair Value		0
Liability Derivatives Fair Value		(1)
Non-qualifying strategies | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,039
Net Derivatives Fair Value	4
Asset Derivatives Fair Value	4
Liability Derivatives Fair Value	$ 0