ALLOWANCE FOR CREDIT LOSSES (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Allowance for credit losses
Allowance for loan losses at the beginning of period	$ 29,020	$ 36,568	$ 30,115	$ 40,655
Charge-offs	(4,317)	(5,906)	(9,088)	(13,037)
Recoveries	(741)	(759)	(1,557)	(1,621)
Replenishment of net charge-offs	3,576	5,147	7,531	11,416
Net reserve releases	(616)	(1,950)	(810)	(5,432)
Net specific reserve builds (releases)	(375)	(16)	(1,308)	96
Other	(418)	(240)	(386)	(957)
Allowance for loan losses at the end of period	27,611	34,362	27,611	34,362
Allowance for loan losses:
Determined in accordance with ASC 450-20	19,596		19,596		20,742
Determined in accordance with ASC 310-10-35	7,924		7,924		9,305
Determined in accordance with ASC 310-30	91		91		68
Total allowance for loan losses	27,611	34,362	27,611	34,362
Loans, net of unearned income:
Loans collectively evaluated for impairment in accordance with ASC 450-20	618,004		618,004		606,609
Loans individually evaluated for impairment in accordance with ASC 310-10-35	31,343		31,343		34,857
Loans acquired with deteriorated credit quality in accordance with ASC 310-30	532		532		511
Loans held at fair value	5,089		5,089		5,265
Loans, net of unearned income	654,968		654,968		647,242
Corporate
Allowance for credit losses
Allowance for loan losses at the beginning of period	3,057		2,879
Charge-offs	(227)		(312)
Recoveries	(73)		(241)
Replenishment of net charge-offs	154		71
Net reserve releases	(77)		77
Net specific reserve builds (releases)	9		5
Other	(17)		11
Allowance for loan losses at the end of period	2,972		2,972
Allowance for loan losses:
Determined in accordance with ASC 450-20	2,494		2,494		2,408
Determined in accordance with ASC 310-10-35	417		417		420
Determined in accordance with ASC 310-30	61		61		51
Total allowance for loan losses	2,972		2,972
Loans, net of unearned income:
Loans collectively evaluated for impairment in accordance with ASC 450-20	238,925		238,925		215,778
Loans individually evaluated for impairment in accordance with ASC 310-10-35	2,956		2,956		3,994
Loans acquired with deteriorated credit quality in accordance with ASC 310-30	131		131		191
Loans held at fair value	3,829		3,829		3,939
Loans, net of unearned income	245,841		245,841		223,902
Consumer
Allowance for credit losses
Allowance for loan losses at the beginning of period	25,963		27,236
Charge-offs	(4,090)		(8,776)
Recoveries	(668)		(1,316)
Replenishment of net charge-offs	3,422		7,460
Net reserve releases	(539)		(887)
Net specific reserve builds (releases)	(384)		(1,313)
Other	(401)		(397)
Allowance for loan losses at the end of period	24,639		24,639
Allowance for loan losses:
Determined in accordance with ASC 450-20	17,102		17,102		18,334
Determined in accordance with ASC 310-10-35	7,507		7,507		8,885
Determined in accordance with ASC 310-30	30		30		17
Total allowance for loan losses	24,639		24,639
Loans, net of unearned income:
Loans collectively evaluated for impairment in accordance with ASC 450-20	379,079		379,079		390,831
Loans individually evaluated for impairment in accordance with ASC 310-10-35	28,387		28,387		30,863
Loans acquired with deteriorated credit quality in accordance with ASC 310-30	401		401		320
Loans held at fair value	1,260		1,260		1,326
Loans, net of unearned income	$ 409,127		$ 409,127		$ 423,340