CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended								9 Months Ended
	Sep. 30, 2012		Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011		Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2012		Sep. 30, 2011
Change in accumulated other comprehensive income (loss), pretax
Balance at the beginning of the period, pretax	$ (25,566)		$ (24,769)	$ (25,454)	$ (19,526)		$ (21,741)	$ (24,607)	$ (25,454)		$ (24,607)
Change in net unrealized gains (losses) on investment securities, pretax	1,189		945	(1,204)	893		1,600	1,262
Foreign currency translation adjustment, pretax	1,068		(1,728)	1,499	(5,228)		745	1,280
Cash flow hedges, pretax	294		(141)	359	(857)		(118)	267
Pension liability adjustment, pretax	(33)		127	31	221		(12)	57
Change, pretax	2,518		(797)	685	(4,971)		2,215	2,866
Balance at the end of the period, pretax	(23,048)		(25,566)	(24,769)	(24,497)		(19,526)	(21,741)	(23,048)		(24,497)
Change in accumulated other comprehensive income (loss), tax effect
Balance at the beginning of the period, tax effect	7,817		8,034	7,666	7,304		7,757	8,330	7,666		8,330
Change in net unrealized gains (losses) on investment securities, tax effect	(413)		(381)	430	(388)		(548)	(522)
Foreign currency translation adjustment, tax effect	177		132	198	293		31	84
Cash flow hedges, tax effect	(108)		52	(139)	325		49	(115)
Pension liability adjustment, tax effect	9		(20)	(121)	(81)		15	(20)
Change, tax effect	(335)		(217)	368	149		(453)	(573)
Balance at the end of the period, tax effect	7,482		7,817	8,034	7,453		7,304	7,757	7,482		7,453
Change in accumulated other comprehensive income (loss), after-tax
Balance at the beginning of the period, after-tax	(17,749)		(16,735)	(17,788)	(12,222)		(13,984)	(16,277)	(17,788)		(16,277)
Change in net unrealized gains (losses) on investment securities, after-tax	776		564	(774)	505		1,052	740	566		2,297
Foreign currency translation adjustment, after-tax	1,245		(1,596)	1,697	(4,935)		776	1,364	1,346		(2,795)
Cash flow hedges, after-tax	186		(89)	220	(532)		(69)	152	317		(449)
Pension liability adjustment, after-tax	(24)	[1]	107	(90)	140	[1]	3	37	(7)	[1]	180	[1]
Change, after-tax	2,183		(1,014)	1,053	(4,822)		1,762	2,293	2,222		(767)
Balance at the end of the period, after-tax	$ (15,566)		$ (17,749)	$ (16,735)	$ (17,044)		$ (12,222)	$ (13,984)	$ (15,566)		$ (17,044)

[1] Primarily reflects adjustments based on the final year-end actuarial valuations of the Company's pension and postretirement plans and amortization of amounts previously recognized in Other comprehensive income.