CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Millions, unless otherwise specified					3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 HDFC	Mar. 31, 2012 SPDB	Mar. 31, 2012 Akbank	Mar. 31, 2013 Net unrealized gains (losses) on investment securities	Mar. 31, 2012 Net unrealized gains (losses) on investment securities	Mar. 31, 2013 Foreign currency translation adjustment, net of hedges	Mar. 31, 2012 Foreign currency translation adjustment, net of hedges	Mar. 31, 2013 Cash flow hedges	Mar. 31, 2012 Cash flow hedges	Mar. 31, 2013 Pension liability adjustments	Mar. 31, 2012 Pension liability adjustments	Mar. 31, 2013 Accumulated other comprehensive income (loss)	Mar. 31, 2012 Accumulated other comprehensive income (loss)	Mar. 31, 2012 Accumulated other comprehensive income (loss) Akbank
Change in accumulated other comprehensive income (loss)
Balance at the beginning of the period, after-tax	$ (17,059)	$ (16,896)	$ (16,735)	$ (17,788)				$ 597	$ (35)	$ (9,930)	$ (10,651)	$ (2,293)	$ (2,820)	$ (5,270)	$ (4,282)	$ (16,896)	$ (17,788)
Change, net of taxes								169	(774)	(711)	1,697	125	220	254	(90)	(163)	1,053
Balance at the end of the period, after-tax	(17,059)	(16,896)	(16,735)	(17,788)				766	(809)	(10,641)	(8,954)	(2,168)	(2,600)	(5,016)	(4,372)	(17,059)	(16,735)
After tax realized gains from sales of minority investments					672	421
Impairment charge related to total investment, after-tax							$ 763											$ 636