FAIR VALUE MEASUREMENTS - Changes in Available-For-Sale Investments and Derivatives Classified as Level 3 (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 346		$ 3,197
Realized investment gains (losses) included in earnings	(9)		2
Unrealized gains (losses) included in other comprehensive income (loss)	(99)		(49)
Purchases	0		0
Issuances	0		0
Sales	0		(400)
Settlements	21		(3)
Transfers into Level 3	0		125	[1]
Transfers out of Level 3	0		(2,616)	[2]
Balance, end of period	259		256
Change in unrealized gains (losses) still held	(9)		2
Fixed Maturities | Mortgage- and asset-backed Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	369		338
Realized investment gains (losses) included in earnings	0		0
Unrealized gains (losses) included in other comprehensive income (loss)	(104)		(21)
Purchases	0		0
Issuances	0		0
Sales	0		0
Settlements	(3)		(3)
Transfers into Level 3	0		125	[1]
Transfers out of Level 3	0		0	[2]
Balance, end of period	262		439
Change in unrealized gains (losses) still held	0		0
Fixed Maturities | Public Utilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0		420
Realized investment gains (losses) included in earnings	0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		(20)
Purchases	0		0
Issuances	0		0
Sales	0		(400)
Settlements	0		0
Transfers into Level 3	0		0	[1]
Transfers out of Level 3	0		0	[2]
Balance, end of period	0		0
Change in unrealized gains (losses) still held	0		0
Fixed Maturities | Sovereign and Supranational
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0		418
Realized investment gains (losses) included in earnings	0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		0
Purchases	0		0
Issuances	0		0
Sales	0		0
Settlements	0		0
Transfers into Level 3	0		0	[1]
Transfers out of Level 3	0		(418)	[2]
Balance, end of period	0		0
Change in unrealized gains (losses) still held	0		0
Fixed Maturities | Banks/financial Institutions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	23		1,024
Realized investment gains (losses) included in earnings	0		0
Unrealized gains (losses) included in other comprehensive income (loss)	2		(1)
Purchases	0		0
Issuances	0		0
Sales	0		0
Settlements	0		0
Transfers into Level 3	0		0	[1]
Transfers out of Level 3	0		(997)	[2]
Balance, end of period	25		26
Change in unrealized gains (losses) still held	0		0
Fixed Maturities | Other Corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0		986
Realized investment gains (losses) included in earnings	0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		0
Purchases	0		0
Issuances	0		0
Sales	0		0
Settlements	0		0
Transfers into Level 3	0		0	[1]
Transfers out of Level 3	0		(986)	[2]
Balance, end of period	0		0
Change in unrealized gains (losses) still held	0		0
Perpetual securities: | Banks/financial Institutions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	52		215
Realized investment gains (losses) included in earnings	0		0
Unrealized gains (losses) included in other comprehensive income (loss)	4		0
Purchases	0		0
Issuances	0		0
Sales	0		0
Settlements	0		0
Transfers into Level 3	0		0	[1]
Transfers out of Level 3	0		(215)	[2]
Balance, end of period	56		0
Change in unrealized gains (losses) still held	0		0
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	3		4
Realized investment gains (losses) included in earnings	0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		0
Purchases	0		0
Issuances	0		0
Sales	0		0
Settlements	0		0
Transfers into Level 3	0		0	[1]
Transfers out of Level 3	0		0	[2]
Balance, end of period	3		4
Change in unrealized gains (losses) still held	0		0
Derivatives | Interest rate swaps
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1	[3]	29	[3]
Realized investment gains (losses) included in earnings	(1)	[3]	(4)	[3]
Unrealized gains (losses) included in other comprehensive income (loss)	0	[3]	0	[3]
Purchases	0	[3]	0	[3]
Issuances	0	[3]	0	[3]
Sales	0	[3]	0	[3]
Settlements	0	[3]	0	[3]
Transfers into Level 3	0	[3]	0	[1],[3]
Transfers out of Level 3	0	[3]	0	[2],[3]
Balance, end of period	0	[3]	25	[3]
Change in unrealized gains (losses) still held	(1)	[3]	(4)	[3]
Derivatives | Foreign currency swaps
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	(99)	[3]	(172)	[3]
Realized investment gains (losses) included in earnings	(10)	[3]	(5)	[3]
Unrealized gains (losses) included in other comprehensive income (loss)	(1)	[3]	(7)	[3]
Purchases	0	[3]	0	[3]
Issuances	0	[3]	0	[3]
Sales	0	[3]	0	[3]
Settlements	24	[3]	0	[3]
Transfers into Level 3	0	[3]	0	[1],[3]
Transfers out of Level 3	0	[3]	0	[2],[3]
Balance, end of period	(86)	[3]	(184)	[3]
Change in unrealized gains (losses) still held	(10)	[3]	(5)	[3]
Derivatives | Credit default swaps
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	(3)	[3]	(65)	[3]
Realized investment gains (losses) included in earnings	2	[3]	11	[3]
Unrealized gains (losses) included in other comprehensive income (loss)	0	[3]	0	[3]
Purchases	0	[3]	0	[3]
Issuances	0	[3]	0	[3]
Sales	0	[3]	0	[3]
Settlements	0	[3]	0	[3]
Transfers into Level 3	0	[3]	0	[1],[3]
Transfers out of Level 3	0	[3]	0	[2],[3]
Balance, end of period	(1)	[3]	(54)	[3]
Change in unrealized gains (losses) still held	$ 2	[3]	$ 11	[3]

[1] Due to a lack of visibility to observe significant inputs to price

[2] A result of changing our pricing methodology to a valuation method that uses observable market data as significant inputs to estimate fair value

[3] Derivative assets and liabilities are presented net