GUARANTEES AND COMMITMENTS (Details 2) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Credit Commitments.
Credit Commitments	$ 958,674,000,000	$ 944,372,000,000
U.S.
Credit Commitments.
Credit Commitments	728,835,000,000
U.S. | Commercial and similar letters of credit
Credit Commitments.
Credit Commitments	1,528,000,000
U.S. | Residential First Mortgage Loans
Credit Commitments.
Credit Commitments	1,566,000,000
U.S. | Home equity loans
Credit Commitments.
Credit Commitments	17,520,000,000
U.S. | Commercial real estate, construction and land development.
Credit Commitments.
Credit Commitments	1,826,000,000
U.S. | Credit card lines
Credit Commitments.
Credit Commitments	564,834,000,000
U.S. | Commercial and other consumer loan commitments
Credit Commitments.
Credit Commitments	141,561,000,000
Outside of U.S.
Credit Commitments.
Credit Commitments	229,839,000,000
Outside of U.S. | Commercial and similar letters of credit
Credit Commitments.
Credit Commitments	8,104,000,000
Outside of U.S. | Residential First Mortgage Loans
Credit Commitments.
Credit Commitments	459,000,000
Outside of U.S. | Home equity loans
Credit Commitments.
Credit Commitments	3,052,000,000
Outside of U.S. | Commercial real estate, construction and land development.
Credit Commitments.
Credit Commitments	321,000,000
Outside of U.S. | Credit card lines
Credit Commitments.
Credit Commitments	126,075,000,000
Outside of U.S. | Commercial and other consumer loan commitments
Credit Commitments.
Credit Commitments	91,828,000,000
Commercial and similar letters of credit
Credit Commitments.
Credit Commitments	9,632,000,000	8,974,000,000
Residential First Mortgage Loans
Credit Commitments.
Credit Commitments	2,025,000,000	2,980,000,000
Home equity loans
Credit Commitments.
Credit Commitments	20,572,000,000	20,934,000,000
Commercial real estate, construction and land development.
Credit Commitments.
Credit Commitments	2,147,000,000	2,407,000,000
Credit card lines
Credit Commitments.
Credit Commitments	690,909,000,000	698,673,000,000
Commercial and other consumer loan commitments
Credit Commitments.
Credit Commitments	233,389,000,000	210,404,000,000
Commercial and other consumer loan commitments, original maturity of less than one year	$ 80,000,000,000	$ 79,000,000,000