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DERIVATIVE INSTRUMENTS - Offsetting of Financial Liabilities and Derivative Liabilities (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Offsetting Liabilities [Line Items]
Derivative liability carrying value	$ (643)	$ (934)
Investments Other Than Consolidated Variable Interest Entities
Offsetting Liabilities [Line Items]
Derivative liability carrying value	(272)	(535)
Derivative liability cash collateral pledged	0	0
Derivative liabilities net	(272)	(535)
Investments Other Than Consolidated Variable Interest Entities \| Foreign currency forwards
Offsetting Liabilities [Line Items]
Derivative liability carrying value	(272)	(535)
Derivative liability cash collateral pledged	0	0
Derivative liabilities net	$ (272)	$ (535)

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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