FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets:
Available-for-sale Securities	$ 61,038	$ 61,578
Asset derivatives	488	345
Cash and cash equivalents	2,543	2,041
Assets, fair value	64,069	63,964
Liabilities:
Liability derivatives	837	934
Total Liabilities	837	934
Interest rate swaps
Assets:
Asset derivatives	1	32
Liabilities:
Liability derivatives		3
Foreign currency swaps
Assets:
Asset derivatives	445	311
Liabilities:
Liability derivatives	218	329
Foreign currency forwards
Assets:
Asset derivatives	17
Liabilities:
Liability derivatives	582	535
Foreign currency options
Assets:
Asset derivatives	4
Liabilities:
Liability derivatives	1
Credit default swaps
Assets:
Asset derivatives	1	2
Liabilities:
Liability derivatives	4	67
Interest rate swaptions
Assets:
Asset derivatives	20
Liabilities:
Liability derivatives	32
Fixed Maturities
Assets:
Available-for-sale Securities	58,070	57,253
Fixed Maturities | Government and Agencies Debt Securities
Assets:
Available-for-sale Securities	15,432	12,997
Fixed Maturities | Municipalities
Assets:
Available-for-sale Securities	1,051	1,195
Fixed Maturities | Mortgage- and asset-backed Securities
Assets:
Available-for-sale Securities	771	1,031
Fixed Maturities | Public Utilities
Assets:
Available-for-sale Securities	7,562	8,497
Fixed Maturities | Sovereign and Supranational
Assets:
Available-for-sale Securities	1,523	2,072
Fixed Maturities | Banks/financial Institutions
Assets:
Available-for-sale Securities	6,509	7,634
Fixed Maturities | Other Corporate
Assets:
Available-for-sale Securities	25,222	23,827
Perpetual securities
Assets:
Available-for-sale Securities	2,947	4,302
Perpetual securities | Banks/financial Institutions
Assets:
Available-for-sale Securities	2,738	3,950
Perpetual securities | Other Corporate
Assets:
Available-for-sale Securities	209	352
Equity securities
Assets:
Available-for-sale Securities	21	23
Level 1
Assets:
Available-for-sale Securities	14,942	12,278
Asset derivatives	0	0
Cash and cash equivalents	2,543	2,041
Assets, fair value	17,485	14,319
Liabilities:
Total Liabilities	0	0
Level 1 | Interest rate swaps
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives		0
Level 1 | Foreign currency swaps
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives	0	0
Level 1 | Foreign currency forwards
Assets:
Asset derivatives	0
Liabilities:
Liability derivatives	0	0
Level 1 | Foreign currency options
Assets:
Asset derivatives	0
Liabilities:
Liability derivatives	0
Level 1 | Credit default swaps
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives	0	0
Level 1 | Interest rate swaptions
Assets:
Asset derivatives	0
Liabilities:
Liability derivatives	0
Level 1 | Fixed Maturities
Assets:
Available-for-sale Securities	14,928	12,265
Level 1 | Fixed Maturities | Government and Agencies Debt Securities
Assets:
Available-for-sale Securities	14,928	12,265
Level 1 | Fixed Maturities | Municipalities
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed Maturities | Mortgage- and asset-backed Securities
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed Maturities | Public Utilities
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed Maturities | Sovereign and Supranational
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed Maturities | Banks/financial Institutions
Assets:
Available-for-sale Securities	0	0
Level 1 | Fixed Maturities | Other Corporate
Assets:
Available-for-sale Securities	0	0
Level 1 | Perpetual securities
Assets:
Available-for-sale Securities	0	0
Level 1 | Perpetual securities | Banks/financial Institutions
Assets:
Available-for-sale Securities	0	0
Level 1 | Perpetual securities | Other Corporate
Assets:
Available-for-sale Securities	0	0
Level 1 | Equity securities
Assets:
Available-for-sale Securities	14	13
Level 2
Assets:
Available-for-sale Securities	45,649	45,895
Asset derivatives	382	154
Cash and cash equivalents	0	0
Assets, fair value	46,031	46,049
Liabilities:
Total Liabilities	630	535
Level 2 | Interest rate swaps
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives		0
Level 2 | Foreign currency swaps
Assets:
Asset derivatives	341	154
Liabilities:
Liability derivatives	15	0
Level 2 | Foreign currency forwards
Assets:
Asset derivatives	17
Liabilities:
Liability derivatives	582	535
Level 2 | Foreign currency options
Assets:
Asset derivatives	4
Liabilities:
Liability derivatives	1
Level 2 | Credit default swaps
Assets:
Asset derivatives	0	0
Liabilities:
Liability derivatives	0	0
Level 2 | Interest rate swaptions
Assets:
Asset derivatives	20
Liabilities:
Liability derivatives	32
Level 2 | Fixed Maturities
Assets:
Available-for-sale Securities	42,750	41,802
Level 2 | Fixed Maturities | Government and Agencies Debt Securities
Assets:
Available-for-sale Securities	504	732
Level 2 | Fixed Maturities | Municipalities
Assets:
Available-for-sale Securities	1,051	1,195
Level 2 | Fixed Maturities | Mortgage- and asset-backed Securities
Assets:
Available-for-sale Securities	402	693
Level 2 | Fixed Maturities | Public Utilities
Assets:
Available-for-sale Securities	7,562	8,077
Level 2 | Fixed Maturities | Sovereign and Supranational
Assets:
Available-for-sale Securities	1,523	1,654
Level 2 | Fixed Maturities | Banks/financial Institutions
Assets:
Available-for-sale Securities	6,486	6,610
Level 2 | Fixed Maturities | Other Corporate
Assets:
Available-for-sale Securities	25,222	22,841
Level 2 | Perpetual securities
Assets:
Available-for-sale Securities	2,895	4,087
Level 2 | Perpetual securities | Banks/financial Institutions
Assets:
Available-for-sale Securities	2,686	3,735
Level 2 | Perpetual securities | Other Corporate
Assets:
Available-for-sale Securities	209	352
Level 2 | Equity securities
Assets:
Available-for-sale Securities	4	6
Level 3
Assets:
Available-for-sale Securities	447	3,405
Asset derivatives	106	191
Cash and cash equivalents	0	0
Assets, fair value	553	3,596
Liabilities:
Total Liabilities	207	399
Level 3 | Interest rate swaps
Assets:
Asset derivatives	1	32
Liabilities:
Liability derivatives		3
Level 3 | Foreign currency swaps
Assets:
Asset derivatives	104	157
Liabilities:
Liability derivatives	203	329
Level 3 | Foreign currency forwards
Assets:
Asset derivatives	0
Liabilities:
Liability derivatives	0	0
Level 3 | Foreign currency options
Assets:
Asset derivatives	0
Liabilities:
Liability derivatives	0
Level 3 | Credit default swaps
Assets:
Asset derivatives	1	2
Liabilities:
Liability derivatives	4	67
Level 3 | Interest rate swaptions
Assets:
Asset derivatives	0
Liabilities:
Liability derivatives	0
Level 3 | Fixed Maturities
Assets:
Available-for-sale Securities	392	3,186
Level 3 | Fixed Maturities | Government and Agencies Debt Securities
Assets:
Available-for-sale Securities	0	0
Level 3 | Fixed Maturities | Municipalities
Assets:
Available-for-sale Securities	0	0
Level 3 | Fixed Maturities | Mortgage- and asset-backed Securities
Assets:
Available-for-sale Securities	369	338
Level 3 | Fixed Maturities | Public Utilities
Assets:
Available-for-sale Securities	0	420
Level 3 | Fixed Maturities | Sovereign and Supranational
Assets:
Available-for-sale Securities	0	418
Level 3 | Fixed Maturities | Banks/financial Institutions
Assets:
Available-for-sale Securities	23	1,024
Level 3 | Fixed Maturities | Other Corporate
Assets:
Available-for-sale Securities	0	986
Level 3 | Perpetual securities
Assets:
Available-for-sale Securities	52	215
Level 3 | Perpetual securities | Banks/financial Institutions
Assets:
Available-for-sale Securities	52	215
Level 3 | Perpetual securities | Other Corporate
Assets:
Available-for-sale Securities	0	0
Level 3 | Equity securities
Assets:
Available-for-sale Securities	$ 3	$ 4