GUARANTEES AND COMMITMENTS (Details 2) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Credit Commitments.
Credit Commitments	$ 918,621,000,000	$ 944,372,000,000
U.S.
Credit Commitments.
Credit Commitments	697,776,000,000
U.S. | Commercial and similar letters of credit
Credit Commitments.
Credit Commitments	1,837,000,000
U.S. | Residential First Mortgage Loans
Credit Commitments.
Credit Commitments	2,422,000,000
U.S. | Home equity loans
Credit Commitments.
Credit Commitments	16,974,000,000
U.S. | Commercial real estate, construction and land development.
Credit Commitments.
Credit Commitments	1,646,000,000
U.S. | Credit card lines
Credit Commitments.
Credit Commitments	528,838,000,000
U.S. | Commercial and other consumer loan commitments
Credit Commitments.
Credit Commitments	146,059,000,000
Outside of U.S.
Credit Commitments.
Credit Commitments	220,845,000,000
Outside of U.S. | Commercial and similar letters of credit
Credit Commitments.
Credit Commitments	7,656,000,000
Outside of U.S. | Residential First Mortgage Loans
Credit Commitments.
Credit Commitments	503,000,000
Outside of U.S. | Home equity loans
Credit Commitments.
Credit Commitments	2,808,000,000
Outside of U.S. | Commercial real estate, construction and land development.
Credit Commitments.
Credit Commitments	286,000,000
Outside of U.S. | Credit card lines
Credit Commitments.
Credit Commitments	119,536,000,000
Outside of U.S. | Commercial and other consumer loan commitments
Credit Commitments.
Credit Commitments	90,056,000,000
Commercial and similar letters of credit
Credit Commitments.
Credit Commitments	9,493,000,000	8,974,000,000
Residential First Mortgage Loans
Credit Commitments.
Credit Commitments	2,925,000,000	2,980,000,000
Home equity loans
Credit Commitments.
Credit Commitments	19,782,000,000	20,934,000,000
Commercial real estate, construction and land development.
Credit Commitments.
Credit Commitments	1,932,000,000	2,407,000,000
Credit card lines
Credit Commitments.
Credit Commitments	648,374,000,000	698,673,000,000
Commercial and other consumer loan commitments
Credit Commitments.
Credit Commitments	236,115,000,000	210,404,000,000
Commercial and other consumer loan commitments, original maturity of less than one year	$ 78,000,000,000	$ 79,000,000,000