DISCONTINUED OPERATIONS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended	1 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Citi Capital Advisors Business item	Apr. 30, 2011 Egg Banking PLC	Mar. 31, 2013 Egg Banking PLC	Mar. 31, 2012 Egg Banking PLC	Apr. 28, 2011 Egg Banking PLC
Discontinued operations
Number of transactions				2
Number of management companies resulting from the sale of business				2
Ownership interest (as a percent)				24.90%
Gain on sale of discontinued operations	$ 56	$ (1)		$ 56	$ 126		$ (1)
Results of Discontinued Operations
Total revenues, net of interest expense	58	1		58			1
Loss from discontinued operations	(155)	(3)		(128)		(27)	(3)
Gain (loss) on sale	56	(1)		56	126		(1)
(Benefit) provision for income taxes	(32)	1		(22)		(10)	(1)
Loss from discontinued operations, net of taxes	(67)	(5)		(50)		(17)	(3)
Assets
Deposits at interest with banks				4
Goodwill				2
Other assets				3
Total assets	9		36	9				2,700
Liabilities
Total liabilities	$ 0							$ 39