LOANS (Details 4) (Consumer, USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014 loan		Jun. 30, 2013 loan		Jun. 30, 2014 loan		Jun. 30, 2013 loan
Loans receivable
Period within which default occurred post-modification					1 year
Number of days past due, non-accrual status					60 days		60 days
Commercial market loans
Loans receivable
Number of days past due, non-accrual status					90 days		90 days
In North America Offices
Loans receivable
Number of loans modified	59,942	[1]	60,491	[1]	125,538	[1]	127,563	[1]
Post-modification recorded investment	$ 877	[1],[2],[3]	$ 1,752	[1],[2],[4]	$ 1,952	[1],[5],[6]	$ 3,408	[1],[5],[6]
Deferred principal	11	[1],[7]	12	[1],[7]	30	[1],[8]	18	[1],[8]
Contingent principal forgiveness	7		2	[1],[9]	19	[1],[9]	2	[1],[9]
Principal forgiveness	4	[1],[10]	50	[1],[10]	16	[1],[10]	140	[1],[10]
Loans in default	255		508		599		1,042
In North America Offices | Residential First Mortgage Loans
Loans receivable
Number of loans modified	4,568		9,071		10,347		18,382
Post-modification recorded investment	534	[2],[3]	1,208	[2],[4]	1,219	[5],[6]	2,454	[5],[6]
Deferred principal	10	[7]	12	[7]	28	[8]	17	[8]
Contingent principal forgiveness	7		2	[9]	19	[9]	2	[9]
Principal forgiveness	2	[10]	42	[10]	5	[10]	102	[10]
Average interest rate reduction (as a percent)	1.00%		1.00%		1.00%		1.00%
Post-modification recorded investment for borrowers that have gone through Chapter 7 bankruptcy	54		126		145		249
Loans in default	168		391		413		781
In North America Offices | Residential First Mortgage Loans | New OCC guidance
Loans receivable
Post-modification recorded investment for borrowers that have gone through Chapter 7 bankruptcy	30		82		87		178
In North America Offices | Home equity loans
Loans receivable
Number of loans modified	1,741		4,235		4,060		7,357
Post-modification recorded investment	63	[2],[3]	283	[2],[4]	147	[5],[6]	370	[5],[6]
Deferred principal	1		0	[7]	2	[8]	1	[8]
Principal forgiveness	2	[10]	8	[10]	11	[10]	38	[10]
Average interest rate reduction (as a percent)	3.00%		1.00%		2.00%		1.00%
Post-modification recorded investment for borrowers that have gone through Chapter 7 bankruptcy	15		25		37		45
Loans in default	17		47		40		103
In North America Offices | Home equity loans | New OCC guidance
Loans receivable
Post-modification recorded investment for borrowers that have gone through Chapter 7 bankruptcy	12		22		31		38
In North America Offices | Credit cards
Loans receivable
Number of loans modified	42,750		36,785		87,726		79,761
Post-modification recorded investment	190	[2],[3]	182	[2],[4]	390	[5],[6]	406	[5],[6]
Average interest rate reduction (as a percent)	15.00%		14.00%		15.00%		14.00%
Loans in default	48		49		99		114
In North America Offices | Installment and other
Loans receivable
Number of loans modified	10,830		10,335		23,314		21,941
Post-modification recorded investment	81	[2],[3]	74	[2],[4]	174	[5],[6]	159	[5],[6]
Average interest rate reduction (as a percent)	6.00%		6.00%		6.00%		6.00%
Loans in default	21		19		40		42
In North America Offices | Commercial market loans
Loans receivable
Number of loans modified	53	[11]	65	[11]	91	[11]	122	[11]
Post-modification recorded investment	9	[11],[2],[3]	5	[11]	22	[11],[5],[6]	19	[11],[5],[6]
Loans in default	1		2		7		2
In offices outside North America
Loans receivable
Number of loans modified	71,183	[1]	49,570	[1]	145,805	[1]	96,451	[1]
Post-modification recorded investment	288	[1],[2],[3]	312	[1],[2],[4]	638	[1],[5],[6]	600	[1],[5],[6]
Deferred principal	0		1	[1],[7]	0	[1],[8]	1	[1],[8]
Contingent principal forgiveness	0		0	[1],[9]	0	[1],[9]	0	[1],[9]
Principal forgiveness	14	[1],[10]	6	[1],[10]	27	[1],[10]	11	[1],[10]
Loans in default	199		109		310		209
In offices outside North America | Residential First Mortgage Loans
Loans receivable
Number of loans modified	743		1,147		1,286		2,181
Post-modification recorded investment	27	[2],[3]	57	[2],[4]	49	[5],[6]	105	[5],[6]
Principal forgiveness	0	[10]	1	[10]	1	[10]	1	[10]
Average interest rate reduction (as a percent)	1.00%		1.00%		1.00%		1.00%
Loans in default	6		18		13		35
In offices outside North America | Home equity loans
Loans receivable
Number of loans modified	6		1		38		4
Post-modification recorded investment	1		0	[2],[4]	6	[5],[6]
In offices outside North America | Credit cards
Loans receivable
Number of loans modified	51,536		34,632		106,357		66,571
Post-modification recorded investment	141	[2],[3]	139	[2],[4]	291	[5],[6]	270	[5],[6]
Principal forgiveness	10	[10]	3	[10]	19	[10]	6	[10]
Average interest rate reduction (as a percent)	21.00%		14.00%		21.00%		15.00%
Loans in default	69		61		139		113
In offices outside North America | Installment and other
Loans receivable
Number of loans modified	18,774		13,668		37,904		27,487
Post-modification recorded investment	78	[2],[3]	80	[2],[4]	158	[5],[6]	179	[5],[6]
Principal forgiveness	4	[10]	2	[10]	7	[10]	4	[10]
Average interest rate reduction (as a percent)	15.00%		8.00%		12.00%		8.00%
Loans in default	29		28		58		57
In offices outside North America | Commercial market loans
Loans receivable
Number of loans modified	124	[11]	122	[11]	220	[11]	208	[11]
Post-modification recorded investment	41	[11],[2],[3]	36	[11],[2],[4]	134	[11],[5],[6]	46	[11],[5],[6]
Deferred principal			1	[11]			1	[11],[8]
Average interest rate reduction (as a percent)	1.00%				1.00%
Loans in default	$ 95		$ 2		$ 100		$ 4

[1] The above tables reflect activity for loans outstanding as of the end of the reporting period that were considered TDRs.

[2] Post-modification balances include past due amounts that are capitalized at the modification date.

[3] Post-modification balances in North America include $54 million of residential first mortgages and $15 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the three months ended June 30, 2014. These amounts include $30 million of residential first mortgages and $12 million of home equity loans that are newly classified as TDRs in the three months ended June 30, 2014 as a result of OCC guidance, as described above.

[4] Post-modification balances in North America include $126 million of residential first mortgages and $25 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the three months ended June 30, 2013. These amounts include $82 million of residential first mortgages and $22 million of home equity loans that are newly classified as TDRs in the three months ended June 30, 2013 as a result of OCC guidance, as described above.

[5] Post-modification balances in North America include $145 million of residential first mortgages and $37 million of home equity loans to borrowers who have gone through Chapter 7 bankruptcy in the six months ended June 30, 2014. These amounts include $87 million of residential first mortgages and $31 million of home equity loans that are newly classified as TDRs as a result of OCC guidance received in the six months ended June 30, 2014, as described above.

[6] Post-modification balances include past due amounts that are capitalized at modification date.

[7] Represents portion of contractual loan principal that is non-interest bearing but still due from the borrower. Such deferred principal is charged off at the time of permanent modification to the extent that the related loan balance exceeds the underlying collateral value.

[8] epresents portion of contractual loan principal that is non-interest bearing but still due from the borrower. Such deferred principal is charged off at the time of permanent modification to the extent that the related loan balance exceeds the underlying collateral value.

[9] Represents portion of contractual loan principal that is non-interest bearing and, depending upon borrower performance, eligible for forgiveness.

[10] Represents portion of contractual loan principal that was forgiven at the time of permanent modification.

[11] Commercial markets loans are generally borrower-specific modifications and incorporate changes in the amount and/or timing of principal and/or interest.