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, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	$ 23,662	$ 22,475
Net Derivatives Fair Value	(1,621)	(349)
Asset Derivatives Fair Value	802	488
Liability Derivatives Fair Value	(2,423)	(837)
Other assets
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,531	5,308
Net Derivatives Fair Value	802	488
Asset Derivatives Fair Value	802	488
Liability Derivatives Fair Value	0	0
Other Liabilities
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	17,131	17,167
Net Derivatives Fair Value	(2,423)	(837)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(2,423)	(837)
Foreign currency swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	746	445
Liability Derivatives Fair Value	(318)	(218)
Foreign currency forwards
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	56	17
Liability Derivatives Fair Value	(1,912)	(582)
Foreign currency options
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value		4
Liability Derivatives Fair Value	(33)	(1)
Interest rate swaptions
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value		20
Liability Derivatives Fair Value	(160)	(32)
Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value		1
Credit default swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value		1
Liability Derivatives Fair Value		(4)
Cash flow hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	127
Net Derivatives Fair Value	(15)	3
Asset Derivatives Fair Value	0	3
Liability Derivatives Fair Value	(15)	0
Cash flow hedges | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	75	75
Net Derivatives Fair Value	(15)	3
Asset Derivatives Fair Value	0	3
Liability Derivatives Fair Value	(15)	0
Cash flow hedges | Interest rate swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount		52
Net Derivatives Fair Value		0
Asset Derivatives Fair Value		0
Liability Derivatives Fair Value		0
Fair value hedges
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	15,587	15,749
Net Derivatives Fair Value	(1,982)	(594)
Asset Derivatives Fair Value	0	20
Liability Derivatives Fair Value	(1,982)	(614)
Fair value hedges | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	12,388	11,249
Net Derivatives Fair Value	(1,791)	(582)
Asset Derivatives Fair Value	0	0
Liability Derivatives Fair Value	(1,791)	(582)
Fair value hedges | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	697
Net Derivatives Fair Value	(32)
Asset Derivatives Fair Value	0
Liability Derivatives Fair Value	(32)
Fair value hedges | Interest rate swaptions
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	2,502	4,500
Net Derivatives Fair Value	(159)	(12)
Asset Derivatives Fair Value	0	20
Liability Derivatives Fair Value	(159)	(32)
Net investment hedge
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,307	451
Net Derivatives Fair Value	54	20
Asset Derivatives Fair Value	56	21
Liability Derivatives Fair Value	(2)	(1)
Net investment hedge | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	1,307	356
Net Derivatives Fair Value	54	17
Asset Derivatives Fair Value	56	17
Liability Derivatives Fair Value	(2)	0
Net investment hedge | Foreign currency options
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount		95
Net Derivatives Fair Value		3
Asset Derivatives Fair Value		4
Liability Derivatives Fair Value		(1)
Non-qualifying strategies
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	6,693	6,148
Net Derivatives Fair Value	322	222
Asset Derivatives Fair Value	746	444
Liability Derivatives Fair Value	(424)	(222)
Non-qualifying strategies | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	5,765	5,829
Net Derivatives Fair Value	443	224
Asset Derivatives Fair Value	746	442
Liability Derivatives Fair Value	(303)	(218)
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 | 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		112
Net Derivatives Fair Value		1
Asset Derivatives Fair Value		1
Liability Derivatives Fair Value		0
Non-qualifying strategies | Credit default swaps
Derivatives, Fair Value [Line Items]
Net Derivatives Notional Amount	83	207
Net Derivatives Fair Value	0	(3)
Asset Derivatives Fair Value	0	1
Liability Derivatives Fair Value	$ 0	$ (4)