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INVESTMENTS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Mar. 31, 2011 Investment	Jun. 30, 2010 Investment	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Schedule of Investments [Line Items]
Available-for-sale fixed maturity securities, recognized gains (losses)	$ (668)		$ (89)	$ (1,247)	$ (135)
Reclassified investments from the held-to-maturity portfolio to the available-for-sale portfolio, number of investments		8	4
Reclassified investments from the held-to-maturity portfolio to the available-for-sale portfolio, amortized cost		1,600	1,200		1,200
Reclassified investments from the held-to-maturity portfolio to the available-for-sale portfolio, aggregate unrealized gain (loss)		270	665
Perpetual securities, interest coupons that were fixed at issuance subsequently change to a floating short-term interest rate				floating short-term interest rate of 125 to more than 300 basis points above an appropriate market index
Other-than-temporary impairment losses	528		0	933	42
Realized pretax investment gains (losses) from sales and redemptions	(182)		14	(326)	(7)
Valuation allowance related to deferred tax asset associated with realized investment losses	19
Fair value of investments in an unrealized loss position	29,906			29,906		30,654
Total Unrealized Losses	2,530			2,530		3,363
Percentage that the lending policy requires that the fair value of the securities and/or unrestricted cash received as collateral be of the fair value of the loaned securities		102.00%
Fair Value Option
Schedule of Investments [Line Items]
Available-for-sale fixed maturity securities, fair value	637			637		619
Available-for-sale fixed maturity securities, recognized gains (losses)	9			12
Fair Value Option \| Upper Limit
Schedule of Investments [Line Items]
Available-for-sale fixed maturity securities, recognized gains (losses)			(1)		(1)
Variable Interest Entity, Not Consolidated
Schedule of Investments [Line Items]
Amortized Cost	13,048			13,048		13,919
Fair value	13,195			13,195		13,219
Variable Interest Entity, Not Consolidated \| A
Schedule of Investments [Line Items]
Number of issuers				167
Parent Company
Schedule of Investments [Line Items]
Available-for-sale fixed-maturity securities, amortized cost	111			111
Available-for-sale fixed maturity securities, fair value	119			119
Banks/financial Institutions \| Alpha Bank \| Investments Sold \| Greece
Schedule of Investments [Line Items]
Number of investments		1
Realized pretax investment gains (losses) from sales and redemptions		(177)
Realized investment gains (losses) from sales and redemptions, after-tax		(115)
Banks/financial Institutions \| EFG Eurobank Ergasias \| Investments Sold \| Greece
Schedule of Investments [Line Items]
Number of investments	1			1
Realized pretax investment gains (losses) from sales and redemptions	2
Banks/financial Institutions \| National Bank of Greece (NBG) \| Investments Sold \| Greece
Schedule of Investments [Line Items]
Realized pretax investment gains (losses) from sales and redemptions	(47)
Banks/financial Institutions \| Banco BPI, SA \| Investments Sold \| Portugal
Schedule of Investments [Line Items]
Realized pretax investment gains (losses) from sales and redemptions	(99)
Realized investment gains (losses) from sales and redemptions, after-tax	(64)
Banks/financial Institutions \| Caixa Geral de Depositos SA \| Impairments \| Portugal
Schedule of Investments [Line Items]
Other-than-temporary impairment losses	112
Other-than-temporary impairment losses, after-tax	73
Banks/financial Institutions \| Banco Espirito Santo SA \| Impairments \| Portugal
Schedule of Investments [Line Items]
Other-than-temporary impairment losses	163
Other-than-temporary impairment losses, after-tax	106
Perpetual Securities
Schedule of Investments [Line Items]
Available-for-sale fixed maturity securities, recognized gains (losses)	(243)		125	(239)	92
Other-than-temporary impairment losses	184		0	184	41
Fair value of investments in an unrealized loss position	3,306			3,306		4,379
Total Unrealized Losses	397			397		563
Perpetual Securities \| Equity Impairment Model Losses
Schedule of Investments [Line Items]
Other-than-temporary impairment losses			0		41
Other-than-temporary impairment losses, after-tax			0		27
Perpetual Securities \| Issuer Creditworthiness
Schedule of Investments [Line Items]
Other-than-temporary impairment losses	184			184
Other-than-temporary impairment losses, after-tax	120			120
Perpetual Securities \| Below Investment Grade
Schedule of Investments [Line Items]
Number of issuers				4
Perpetual Securities \| Investment grade
Schedule of Investments [Line Items]
Percentage of unrealized losses attributable to securities that were investment grade	93.00%			93.00%		83.00%
Perpetual Securities \| Europe, excluding the United Kingdom
Schedule of Investments [Line Items]
Geographic concentration of credit risk for issuer of investments owned	70.00%			70.00%
Perpetual Securities \| United Kingdom
Schedule of Investments [Line Items]
Geographic concentration of credit risk for issuer of investments owned	10.00%			10.00%
Perpetual Securities \| Japan
Schedule of Investments [Line Items]
Geographic concentration of credit risk for issuer of investments owned	14.00%			14.00%
Perpetual Securities \| Other Countries
Schedule of Investments [Line Items]
Geographic concentration of credit risk for issuer of investments owned	6.00%			6.00%
Banks/financial Institutions \| Investments Sold \| Below Investment Grade \| Ireland
Schedule of Investments [Line Items]
Realized pretax investment gains (losses) from sales and redemptions	(74)	2
Realized investment gains (losses) from sales and redemptions, after-tax	(48)
Banks/financial Institutions \| Below Investment Grade
Schedule of Investments [Line Items]
Fair value of investments in an unrealized loss position	800			800
Total Unrealized Losses	300			300
Number of investments				2
Percentage of unrealized losses attributable to a certain number of securities	83.00%			83.00%
Number of issuers with average unrealized losses per investment				8
Banks/financial Institutions \| Below Investment Grade \| Ireland
Schedule of Investments [Line Items]
Amortized Cost	248			248
Fair value	139			139
Banks/financial Institutions \| Below Investment Grade \| Upper Limit
Schedule of Investments [Line Items]
Issuers, average unrealized losses per investment	7			7
Mortgage- and asset-backed Securities \| Investment grade
Schedule of Investments [Line Items]
Percentage of unrealized losses attributable to securities that were investment grade	70.00%			70.00%		54.00%
Banks/financial Institutions \| Investment grade
Schedule of Investments [Line Items]
Percentage of unrealized losses attributable to securities that were investment grade	78.00%			78.00%		53.00%
Other Corporate \| Investment grade
Schedule of Investments [Line Items]
Percentage of unrealized losses attributable to securities that were investment grade	61.00%			61.00%		51.00%
Municipalities \| Investment grade
Schedule of Investments [Line Items]
Percentage of unrealized losses attributable to securities that were investment grade	71.00%			71.00%		82.00%
Investment grade \| Public Utilities
Schedule of Investments [Line Items]
Percentage of unrealized losses attributable to securities that were investment grade	95.00%			95.00%		100.00%
Banks/financial Institutions
Schedule of Investments [Line Items]
Amortized Cost	27,294			27,294		29,540
Fair value	26,587			26,587		27,910
Fair value of investments in an unrealized loss position	13,900			13,900
Total Unrealized Losses	1,400			1,400
Banks/financial Institutions \| Europe, excluding the United Kingdom
Schedule of Investments [Line Items]
Geographic concentration of credit risk for issuer of investments owned	43.00%			43.00%
Banks/financial Institutions \| United States
Schedule of Investments [Line Items]
Geographic concentration of credit risk for issuer of investments owned	21.00%			21.00%
Banks/financial Institutions \| United Kingdom
Schedule of Investments [Line Items]
Geographic concentration of credit risk for issuer of investments owned	8.00%			8.00%
Banks/financial Institutions \| Japan
Schedule of Investments [Line Items]
Geographic concentration of credit risk for issuer of investments owned	8.00%			8.00%
Banks/financial Institutions \| Other Countries
Schedule of Investments [Line Items]
Geographic concentration of credit risk for issuer of investments owned	20.00%			20.00%
Banks/financial Institutions \| Greece
Schedule of Investments [Line Items]
Other-than-temporary impairment losses		397
Other-than-temporary impairment losses, after-tax		258
Number of investments		2
Republic of Tunisia
Schedule of Investments [Line Items]
Reclassified investments from the held-to-maturity portfolio to the available-for-sale portfolio, amortized cost		769
Portugal and Ireland
Schedule of Investments [Line Items]
Reclassified investments from the held-to-maturity portfolio to the available-for-sale portfolio, number of investments		4
Reclassified investments from the held-to-maturity portfolio to the available-for-sale portfolio, amortized cost		$ 631