LOANS (Details 3) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Financing receivable impaired
Charge-offs	$ 4,638,000,000	$ 5,217,000,000	$ 13,726,000,000	$ 18,254,000,000
Net reserve builds (releases)	868,000,000	1,591,000,000	1,678,000,000	7,023,000,000
New OCC guidance
Financing receivable impaired
Charge-offs	635,000,000
Net reserve builds (releases)	600,000,000
Consumer
Financing receivable impaired
Recorded investment	30,849,000,000		30,849,000,000		30,863,000,000
Unpaid principal balance	32,552,000,000		32,552,000,000		32,418,000,000
Related specific allowance	7,021,000,000		7,021,000,000		8,885,000,000
Average carrying value			29,898,000,000		30,080,000,000
Interest income recognized	450,000,000	417,000,000	1,214,000,000	1,268,000,000
Smaller-balance impaired consumer loans modified since January 1, 2008, dollar amount	30,300,000,000		30,300,000,000		30,300,000,000
Amounts of such outstanding modified consumer loans, including those modified prior to 2008	31,300,000,000		31,300,000,000		31,500,000,000
Consumer | New OCC guidance
Financing receivable impaired
Charge-offs	635,000,000
Net reserve builds (releases)	600,000,000
Recorded investment in receivables reclassified to TDR as a result of new guidance issued by OCC	1,714,000,000		1,714,000,000
Consumer | Residential First Mortgage Loans
Financing receivable impaired
Recorded investment	21,169,000,000		21,169,000,000		19,616,000,000
Unpaid principal balance	22,444,000,000		22,444,000,000		20,803,000,000
Related specific allowance	2,809,000,000		2,809,000,000		3,404,000,000
Average carrying value			19,643,000,000		18,642,000,000
Interest income recognized	251,000,000	220,000,000	674,000,000	674,000,000
Impaired financing receivable without specific allowance	2,517,000,000		2,517,000,000		858,000,000
Consumer | Residential First Mortgage Loans | New OCC guidance
Financing receivable impaired
Recorded investment in receivables reclassified to TDR as a result of new guidance issued by OCC	1,327,000,000		1,327,000,000
Consumer | Home equity loans
Financing receivable impaired
Recorded investment	2,134,000,000		2,134,000,000		1,771,000,000
Unpaid principal balance	2,319,000,000		2,319,000,000		1,823,000,000
Related specific allowance	1,248,000,000		1,248,000,000		1,252,000,000
Average carrying value			1,820,000,000		1,680,000,000
Interest income recognized	31,000,000	21,000,000	64,000,000	51,000,000
Impaired financing receivable without specific allowance	438,000,000		438,000,000		16,000,000
Consumer | Home equity loans | New OCC guidance
Financing receivable impaired
Recorded investment in receivables reclassified to TDR as a result of new guidance issued by OCC	387,000,000		387,000,000
Consumer | Credit cards
Financing receivable impaired
Recorded investment	5,014,000,000		5,014,000,000		6,695,000,000
Unpaid principal balance	5,071,000,000		5,071,000,000		6,743,000,000
Related specific allowance	2,032,000,000		2,032,000,000		3,122,000,000
Average carrying value			5,800,000,000		6,542,000,000
Interest income recognized	75,000,000	98,000,000	240,000,000	296,000,000
Consumer | Individual installment and other
Financing receivable impaired
Recorded investment	2,013,000,000		2,013,000,000		2,264,000,000
Unpaid principal balance	2,018,000,000		2,018,000,000		2,267,000,000
Related specific allowance	858,000,000		858,000,000		1,032,000,000
Average carrying value			2,121,000,000		2,644,000,000
Interest income recognized	88,000,000	75,000,000	218,000,000	228,000,000
Consumer | Commercial market loans
Financing receivable impaired
Recorded investment	519,000,000		519,000,000		517,000,000
Unpaid principal balance	700,000,000		700,000,000		782,000,000
Related specific allowance	74,000,000		74,000,000		75,000,000
Average carrying value			514,000,000		572,000,000
Interest income recognized	5,000,000	3,000,000	18,000,000	19,000,000	31,000,000
Impaired financing receivable without specific allowance	$ 186,000,000		$ 186,000,000		$ 182,000,000