ALLOWANCE FOR CREDIT LOSSES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for credit losses
Allowance for loan losses at the beginning of year	$ 25,455	$ 30,115	$ 40,655
Gross credit losses	(12,769)	(17,005)	(22,699)
Gross recoveries	2,306	2,774	3,012
Net credit losses (NCLs)	(10,463)	(14,231)	(19,687)
NCLs	10,463	14,231	19,687
Net reserve builds (releases)	(1,961)	(1,908)	(8,525)
Net specific reserve builds (releases)	(898)	(1,865)	174
Total provision for credit losses	7,604	10,458	11,336
Other, net	(2,948)	(887)	(2,189)
Allowance for loan losses at the end of year	19,648	25,455	30,115
Allowance for credit losses on unfunded lending commitments
Allowance for credit losses on unfunded lending commitments at beginning of year	1,119	1,136	1,066
Provision (release) for unfunded lending commitments	80	(16)	51
Other, net	30	(1)	19
Allowance for credit losses on unfunded lending commitments at end of year	1,229	1,119	1,136
Total allowance for loans, leases, and unfunded lending commitments at end of period	$ 20,877	$ 26,574	$ 31,251