BUSINESS SEGMENTS (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Consumer Banking	Sep. 30, 2013 Consumer Banking	Jun. 30, 2013 Consumer Banking	Sep. 30, 2014 Consumer Banking	Sep. 30, 2013 Consumer Banking	Sep. 30, 2014 Commercial Banking	Sep. 30, 2013 Commercial Banking	Sep. 30, 2014 Commercial Banking	Sep. 30, 2013 Commercial Banking	Sep. 30, 2014 Other	Sep. 30, 2013 Other	Sep. 30, 2014 Other	Sep. 30, 2013 Other	Sep. 30, 2014 Forecast Maximum Consumer Banking	Sep. 30, 2014 Forecast Maximum Commercial Banking	Sep. 30, 2014 Forecast Minimum Commercial Banking
Segment Reporting Information [Line Items]
Revenues	$ 1,161	$ 1,153	$ 3,800	$ 3,532		$ 758	$ 789		$ 2,296	$ 2,423	$ 374	$ 356	$ 1,108	$ 1,055	$ 29	$ 8	$ 396	$ 54	$ 25	$ 2,500	$ 25
Goodwill impairment	$ 0	$ 0	$ 0	$ 4,435	$ 4,400			$ 4,400		$ 4,435				$ 0