DERIVATIVE INSTRUMENTS - Offsetting of Financial Assets and Derivative Assets (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	$ 523		$ 488
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	523		488
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, collateral, obligation to return cash	(263)	[1]	(295)	[1]
Derivative asset, fair value, amount offset against collateral	260		193
Foreign currency swaps
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	426		445
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	426		445
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, collateral, obligation to return cash	(253)		(276)
Derivative asset, fair value, amount offset against collateral	173		169
Foreign currency forwards
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	58		17
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	58		17
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, collateral, obligation to return cash	(9)		(16)
Derivative asset, fair value, amount offset against collateral	49		1
Foreign currency options
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	26		4
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	26		4
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, collateral, obligation to return cash	(1)		(3)
Derivative asset, fair value, amount offset against collateral	25		1
Credit default swaps
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	1		1
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	1		1
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, collateral, obligation to return cash	0		0
Derivative asset, fair value, amount offset against collateral	1		1
Interest rate swaptions
Offsetting Assets [Line Items]
Gross amount of recognized derivative assets	12		20
Gross amount of liabilities offset in balance sheet	0		0
Net amount of derivative assets presented in balance sheet	12		20
Financial instruments, amount not offset against derivative assets in balance sheet	0		0
Derivative, collateral, obligation to return cash	0		0
Derivative asset, fair value, amount offset against collateral	12		20
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, collateral, obligation to return cash			0
Derivative asset, fair value, amount offset against collateral			1
Offsetting assets
Offsetting Assets [Line Items]
Gross amounts of recognized financial instruments	3,757		6,144
Gross amounts offset in balance sheet	0		0
Net amounts of assets presented in balance sheet	3,757		6,144
Carrying value of financial instruments not offset in balance sheet	0		0
Collateral not offset in balance sheet	(3,497)		(5,951)
Financial instruments, amount offset against collateral	260		193
Offsetting assets | Securities lending and similar arrangements
Offsetting Assets [Line Items]
Gross amounts of recognized financial instruments	3,234		5,656
Gross amounts offset in balance sheet	0		0
Net amounts of assets presented in balance sheet	3,234		5,656
Carrying value of financial instruments not offset in balance sheet	0		0
Collateral not offset in balance sheet	(3,234)		(5,656)
Financial instruments, amount offset against collateral	$ 0		$ 0

[1] Consists entirely of cash.