CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Change in accumulated other comprehensive income (loss), pretax
Balance at the beginning of the period, pretax	$ (25,334)		$ (25,807)
Change in net unrealized gains (losses) on investment securities, pretax	281		(1,204)
Foreign currency translation adjustment, pretax	(697)		1,576
Cash flow hedges, pretax	201		359
Pension liability adjustment, pretax	348		31
Change, pretax	133		762
Balance at the end of the period, pretax	(25,201)		(25,045)
Change in accumulated other comprehensive income (loss), tax effect
Balance at the beginning of the period, tax effect	8,438		8,019
Change in net unrealized gains (losses) on investment securities, tax effect	(112)		430
Foreign currency translation adjustment, tax effect	(14)		121
Cash flow hedges, tax effect	(76)		(139)
Pension liability adjustment, tax effect	(94)		(121)
Change, tax effect	(296)		291
Balance at the end of the period, tax effect	8,142		8,310
Change in accumulated other comprehensive income (loss), after-tax
Balance at the beginning of the period, after-tax	(16,896)		(17,788)
Change in net unrealized gains (losses) on investment securities, after-tax	169		(774)
Foreign currency translation adjustment, after-tax	(711)		1,697
Cash flow hedges, after-tax	125		220
Pension liability adjustment, after-tax	254	[1]	(90)	[1]
Change, after-tax	(163)		1,053
Balance at the end of the period, after-tax	$ (17,059)		$ (16,735)

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