DERIVATIVE INSTRUMENTS - Offsetting of Financial Assets and Derivative Assets (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	$ 591		$ 488
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	591		488
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, Collateral, Obligation to Return Cash and Securities	(273)	[1]
Derivative asset, fair value, amount offset against collateral	318		193
Derivative, Collateral, Obligation to Return Cash	(191)		(295)	[2]
Derivative, Collateral, Obligation to Return Securities	(82)
Foreign currency swaps
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	464		445
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	464		445
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, Collateral, Obligation to Return Cash and Securities	(250)
Derivative asset, fair value, amount offset against collateral	214		169
Derivative, Collateral, Obligation to Return Cash			(276)
Foreign currency forwards
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	107		17
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	107		17
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, Collateral, Obligation to Return Cash and Securities	(16)
Derivative asset, fair value, amount offset against collateral	91		1
Derivative, Collateral, Obligation to Return Cash			(16)
Foreign currency options
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	9		4
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	9		4
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, Collateral, Obligation to Return Cash and Securities	(7)
Derivative asset, fair value, amount offset against collateral	2		1
Derivative, Collateral, Obligation to Return Cash			(3)
Credit default swaps
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets			1
Gross amount of liabilities offset in balance sheet			0
Net amount of derivative assets presented in balance sheet			1
Financial instruments, amount not offset against derivative assets in balance sheet			0
Derivative asset, fair value, amount offset against collateral			1
Derivative, Collateral, Obligation to Return Cash			0
Interest rate swaps
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets			1
Gross amount of liabilities offset in balance sheet			0
Net amount of derivative assets presented in balance sheet			1
Financial instruments, amount not offset against derivative assets in balance sheet			0
Derivative asset, fair value, amount offset against collateral			1
Derivative, Collateral, Obligation to Return Cash			0
Interest rate swaptions
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	11		20
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	11		20
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, Collateral, Obligation to Return Cash and Securities	0
Derivative asset, fair value, amount offset against collateral	11		20
Derivative, Collateral, Obligation to Return Cash			0
Offsetting assets
Offsetting Assets [Line Items]
Gross amounts of recognized financial instruments	3,498		6,144
Gross amounts offset in balance sheet	0		0
Net amounts of assets presented in balance sheet	3,498		6,144
Carrying value of financial instruments not offset in balance sheet	0		0
Collateral not offset in balance sheet	(3,180)		(5,951)
Financial instruments, amount offset against collateral	318		193
Offsetting assets | Securities lending and similar arrangements
Offsetting Assets [Line Items]
Gross amounts of recognized financial instruments	2,907		5,656
Gross amounts offset in balance sheet	0		0
Net amounts of assets presented in balance sheet	2,907		5,656
Carrying value of financial instruments not offset in balance sheet	0		0
Collateral not offset in balance sheet	(2,907)		(5,656)
Financial instruments, amount offset against collateral	$ 0		$ 0

[1] Consists of $82 of securities and $191 of cash

[2] Consists entirely of cash.