ALLOWANCE FOR CREDIT LOSSES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Allowance for credit losses
Allowance for loan losses at the beginning of period	$ 29,020	$ 36,568	$ 30,115	$ 40,655
Gross credit losses	(4,317)	(5,906)	(9,088)	(13,037)
Gross recoveries	741	759	1,557	1,621
Net credit losses (NCLs)	(3,576)	(5,147)	(7,531)	(11,416)
Replenishment of net charge-offs	3,576	5,147	7,531	11,416
Net reserve builds (releases)	(616)	(1,950)	(810)	(5,432)
Net specific reserve builds	(375)	(16)	(1,308)	96
Total provision for credit losses	2,585	3,181	5,413	6,080
Other, net	(418)	(240)	(386)	(957)
Allowance for loan losses at the end of period	27,611	34,362	27,611	34,362
Allowance for credit losses on unfunded lending commitments
Allowance for credit losses on unfunded lending commitments at beginning of period	1,097	1,105	1,136	1,066
Provision (release) for unfunded lending commitments	7	(13)	(31)	12
Allowance for credit losses on unfunded lending commitments at end of period	1,104	1,097	1,104	1,097
Total allowance for loans, leases, and unfunded lending commitments at end of period	$ 28,715	$ 35,459	$ 28,715	$ 35,459