DERIVATIVE INSTRUMENTS - Offsetting of Financial Assets and Derivative Assets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	$ 541		$ 488
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	541		488
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, Collateral, Obligation to Return Cash and Securities	(369)	[1]
Derivative asset, fair value, amount offset against collateral	172		193
Derivative, Collateral, Obligation to Return Cash	(264)		(295)	[2]
Derivative, Collateral, Obligation to Return Securities	(105)
Foreign currency swaps
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	519		445
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	519		445
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, Collateral, Obligation to Return Cash and Securities	(357)
Derivative asset, fair value, amount offset against collateral	162		169
Derivative, Collateral, Obligation to Return Cash			(276)
Foreign currency forwards
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	7		17
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	7		17
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	0		1
Derivative, Collateral, Obligation to Return Cash			(16)
Foreign currency options
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	1		4
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	1		4
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	1		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	14		20
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	14		20
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, Collateral, Obligation to Return Cash and Securities	(5)
Derivative asset, fair value, amount offset against collateral	9		20
Derivative, Collateral, Obligation to Return Cash			0
Offsetting assets
Offsetting Assets [Line Items]
Gross amounts of recognized financial instruments	7,414		6,144
Gross amounts offset in balance sheet	0		0
Net amounts of assets presented in balance sheet	7,414		6,144
Carrying value of financial instruments not offset in balance sheet	0		0
Collateral not offset in balance sheet	(7,242)		(5,951)
Financial instruments, amount offset against collateral	172		193
Offsetting assets | Securities lending and similar arrangements
Offsetting Assets [Line Items]
Gross amounts of recognized financial instruments	6,873		5,656
Gross amounts offset in balance sheet	0		0
Net amounts of assets presented in balance sheet	6,873		5,656
Carrying value of financial instruments not offset in balance sheet	0		0
Collateral not offset in balance sheet	(6,873)		(5,656)
Financial instruments, amount offset against collateral	$ 0		$ 0

[1] Consists of $105 of pledged securities and $264 of cash

[2] Consists entirely of cash.