INVESTMENTS (Details 8) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended				3 Months Ended			9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2012 MSSB	Jun. 21, 2013 MSSB	Dec. 31, 2012 MSSB	Sep. 16, 2012 MSSB	Jun. 30, 2013 Equity Method Investment MSSB	Mar. 31, 2013 Equity Method Investment MSSB	Sep. 30, 2013 Total securities AFS	Sep. 30, 2013 Total securities AFS	Sep. 30, 2013 Held-to-maturity Securities	Sep. 30, 2013 Held-to-maturity Securities	Sep. 30, 2013 Other assets
OTTI on Investments disclosures
Total OTTI losses recognized during the period	$ 17		$ 34								$ 2	$ 7	$ 15	$ 27
Net impairment losses recognized in earnings for securities that the Company does not intend to sell nor will likely be required to sell	17		34								2	7	15	27
Impairment losses recognized in earnings for securities that the Company intends to sell or more- likely-than-not will be required to sell before recovery	22		428								22	236			192
Total impairment losses recognized in earnings	39	3,470	462	4,903							24	243	15	27	192
Impairment charge related to investment, pre-tax				$ 3,340	$ 3,340				$ 87	$ 105
Percentage of ownership interest held					35.00%	35.00%	35.00%	49.00%		35.00%