ALLOWANCE FOR CREDIT LOSSES (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Allowance for credit losses
Allowance for loan losses at the beginning of period	$ 27,611	$ 34,362	$ 30,115	$ 40,655
Charge-offs	(4,638)	(5,217)	(13,726)	(18,254)
Recoveries	659	703	2,216	2,324
Replenishment of net charge-offs	3,979	4,514	11,510	15,930
Net reserve builds (releases)	(868)	(1,591)	(1,678)	(7,023)
Net specific reserve builds (releases)	(600)	126	(1,908)	222
Other	(227)	(845)	(613)	(1,802)
Allowance for loan losses at the end of period	25,916	32,052	25,916	32,052
Allowance for loan losses:
Determined in accordance with ASC 450-20	18,550		18,550		20,742
Determined in accordance with ASC 310-10-35	7,275		7,275		9,305
Determined in accordance with ASC 310-30	91		91		68
Total allowance for loan losses	25,916	32,052	25,916	32,052
Loans, net of unearned income:
Loans collectively evaluated for impairment in accordance with ASC 450-20	618,736		618,736		606,609
Loans individually evaluated for impairment in accordance with ASC 310-10-35	33,795		33,795		34,857
Loans acquired with deteriorated credit quality in accordance with ASC 310-30	533		533		511
Loans held at fair value	5,359		5,359		5,265
Loans, net of unearned income	658,423		658,423		647,242
Corporate
Allowance for credit losses
Allowance for loan losses at the beginning of period	2,972		2,879
Charge-offs	(196)		(508)
Recoveries	79		320
Replenishment of net charge-offs	117		188
Net reserve builds (releases)	1		78
Net specific reserve builds (releases)	(175)		(170)
Other	19		30
Allowance for loan losses at the end of period	2,817		2,817
Allowance for loan losses:
Determined in accordance with ASC 450-20	2,502		2,502		2,408
Determined in accordance with ASC 310-10-35	254		254		420
Determined in accordance with ASC 310-30	61		61		51
Total allowance for loan losses	2,817		2,817
Loans, net of unearned income:
Loans collectively evaluated for impairment in accordance with ASC 450-20	243,510		243,510		215,778
Loans individually evaluated for impairment in accordance with ASC 310-10-35	2,946		2,946		3,994
Loans acquired with deteriorated credit quality in accordance with ASC 310-30	112		112		191
Loans held at fair value	4,103		4,103		3,939
Loans, net of unearned income	250,671		250,671		223,902
Consumer
Allowance for credit losses
Allowance for loan losses at the beginning of period	24,639		27,236
Charge-offs	(4,442)		(13,218)
Recoveries	580		1,896
Replenishment of net charge-offs	3,862		11,322
Net reserve builds (releases)	(869)		(1,756)
Net specific reserve builds (releases)	(425)		(1,738)
Other	(246)		(643)
Allowance for loan losses at the end of period	23,099		23,099
Allowance for loan losses:
Determined in accordance with ASC 450-20	16,048		16,048		18,334
Determined in accordance with ASC 310-10-35	7,021		7,021		8,885
Determined in accordance with ASC 310-30	30		30		17
Total allowance for loan losses	23,099		23,099
Loans, net of unearned income:
Loans collectively evaluated for impairment in accordance with ASC 450-20	375,226		375,226		390,831
Loans individually evaluated for impairment in accordance with ASC 310-10-35	30,849		30,849		30,863
Loans acquired with deteriorated credit quality in accordance with ASC 310-30	421		421		320
Loans held at fair value	1,256		1,256		1,326
Loans, net of unearned income	$ 407,752		$ 407,752		$ 423,340