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				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 304		$ 327		$ 346		$ 3,197
Realized investment gains (losses) included in earnings	(93)		52		(78)		118
Unrealized gains (losses) included in other comprehensive income (loss)	(27)		10		(113)		(69)
Purchases	0		0		0		0
Issuances	0		0		0		0
Sales	0		13		(60)		(387)
Settlements	(3)		(3)		86		(9)
Transfers into Level 3	0		0		0		174	[1]
Transfers out of Level 3	0		0		0		(2,625)	[2]
Balance, end of period	181		399		181		399
Change in unrealized gains (losses) still held	(93)		52		(78)		118
Fixed Maturities | Mortgage- and asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	266		399		369		338
Realized investment gains (losses) included in earnings	0		0		0		0
Unrealized gains (losses) included in other comprehensive income (loss)	(18)		7		(115)		(42)
Purchases	0		0		0		0
Issuances	0		0		0		0
Sales	0		0		0		0
Settlements	(3)		(3)		(9)		(9)
Transfers into Level 3	0		0		0		125	[1]
Transfers out of Level 3	0		0		0		(9)	[2]
Balance, end of period	245		403		245		403
Change in unrealized gains (losses) still held	0		0		0		0
Fixed Maturities | Public Utilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0		0		0		420
Realized investment gains (losses) included in earnings	0		0		0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		0		0		(20)
Purchases	0		0		0		0
Issuances	0		0		0		0
Sales	0		0		0		(400)
Settlements	0		0		0		0
Transfers into Level 3	0		0		0		0	[1]
Transfers out of Level 3	0		0		0		0	[2]
Balance, end of period	0		0		0		0
Change in unrealized gains (losses) still held	0		0		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		0		0		418
Realized investment gains (losses) included in earnings	0		0		0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		0		0		0
Purchases	0		0		0		0
Issuances	0		0		0		0
Sales	0		0		0		0
Settlements	0		0		0		0
Transfers into Level 3	0		0		0		0	[1]
Transfers out of Level 3	0		0		0		(418)	[2]
Balance, end of period	0		0		0		0
Change in unrealized gains (losses) still held	0		0		0		0
Fixed Maturities | Banks/financial Institutions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	25		25		23		1,024
Realized investment gains (losses) included in earnings	0		0		0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		(1)		2		(3)
Purchases	0		0		0		0
Issuances	0		0		0		0
Sales	0		0		0		0
Settlements	0		0		0		0
Transfers into Level 3	0		0		0		0	[1]
Transfers out of Level 3	0		0		0		(997)	[2]
Balance, end of period	25		24		25		24
Change in unrealized gains (losses) still held	0		0		0		0
Fixed Maturities | Other Corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0		0		0		986
Realized investment gains (losses) included in earnings	0		0		0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		0		0		0
Purchases	0		0		0		0
Issuances	0		0		0		0
Sales	0		0		0		0
Settlements	0		0		0		0
Transfers into Level 3	0		0		0		0	[1]
Transfers out of Level 3	0		0		0		(986)	[2]
Balance, end of period	0		0		0		0
Change in unrealized gains (losses) still held	0		0		0		0
Perpetual securities | Banks/financial Institutions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0		49		52		215
Realized investment gains (losses) included in earnings	0		0		0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		2		8		2
Purchases	0		0		0		0
Issuances	0		0		0		0
Sales	0		0		(60)		0
Settlements	0		0		0		0
Transfers into Level 3	0		0		0		49	[1]
Transfers out of Level 3	0		0		0		(215)	[2]
Balance, end of period	0		51		0		51
Change in unrealized gains (losses) still held	0		0		0		0
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	3		3		3		4
Realized investment gains (losses) included in earnings	0		0		0		0
Unrealized gains (losses) included in other comprehensive income (loss)	0		0		0		(1)
Purchases	0		0		0		0
Issuances	0		0		0		0
Sales	0		0		0		0
Settlements	0		0		0		0
Transfers into Level 3	0		0		0		0	[1]
Transfers out of Level 3	0		0		0		0	[2]
Balance, end of period	3		3		3		3
Change in unrealized gains (losses) still held	0		0		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]	21	[3]	1	[3]	29	[3]
Realized investment gains (losses) included in earnings	1	[3]	(1)	[3]	(1)	[3]	(9)	[3]
Unrealized gains (losses) included in other comprehensive income (loss)	0	[3]	0	[3]	0	[3]	0	[3]
Purchases	0	[3]	0	[3]	0	[3]	0	[3]
Issuances	0	[3]	0	[3]	0	[3]	0	[3]
Sales	0	[3]	(20)	[3]	0	[3]	(20)	[3]
Settlements	0	[3]	0	[3]	0	[3]	0	[3]
Transfers into Level 3	0	[3]	0	[3]	0	[3]	0	[1],[3]
Transfers out of Level 3	0	[3]	0	[3]	0	[3]	0	[2],[3]
Balance, end of period	0	[3]	0	[3]	0	[3]	0	[3]
Change in unrealized gains (losses) still held	1	[3]	(1)	[3]	(1)	[3]	(9)	[3]
Derivatives | Foreign currency swaps
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	11	[3]	(126)	[3]	(99)	[3]	(172)	[3]
Realized investment gains (losses) included in earnings	(93)	[3]	49	[3]	(79)	[3]	102	[3]
Unrealized gains (losses) included in other comprehensive income (loss)	(9)	[3]	2	[3]	(8)	[3]	(5)	[3]
Purchases	0	[3]	0	[3]	0	[3]	0	[3]
Issuances	0	[3]	0	[3]	0	[3]	0	[3]
Sales	0	[3]	0	[3]	0	[3]	0	[3]
Settlements	0	[3]	0	[3]	95	[3]	0	[3]
Transfers into Level 3	0	[3]	0	[3]	0	[3]	0	[1],[3]
Transfers out of Level 3	0	[3]	0	[3]	0	[3]	0	[2],[3]
Balance, end of period	(91)	[3]	(75)	[3]	(91)	[3]	(75)	[3]
Change in unrealized gains (losses) still held	(93)	[3]	49	[3]	(79)	[3]	102	[3]
Derivatives | Credit default swaps
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0	[3]	(44)	[3]	(3)	[3]	(65)	[3]
Realized investment gains (losses) included in earnings	(1)	[3]	4	[3]	2	[3]	25	[3]
Unrealized gains (losses) included in other comprehensive income (loss)	0	[3]	0	[3]	0	[3]	0	[3]
Purchases	0	[3]	0	[3]	0	[3]	0	[3]
Issuances	0	[3]	0	[3]	0	[3]	0	[3]
Sales	0	[3]	33	[3]	0	[3]	33	[3]
Settlements	0	[3]	0	[3]	0	[3]	0	[3]
Transfers into Level 3	0	[3]	0	[3]	0	[3]	0	[1],[3]
Transfers out of Level 3	0	[3]	0	[3]	0	[3]	0	[2],[3]
Balance, end of period	(1)	[3]	(7)	[3]	(1)	[3]	(7)	[3]
Change in unrealized gains (losses) still held	$ (1)	[3]	$ 4	[3]	$ 2	[3]	$ 25	[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