BASIS OF PRESENTATION (Details 2) (USD $)	1 Months Ended	3 Months Ended			9 Months Ended
	Jan. 31, 2012	Sep. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Jan. 02, 2012
New Accounting Pronouncements or Change in Accounting Principle
Incremental charge-offs due to implementation of new guidance		$ 4,638,000,000		$ 5,217,000,000	$ 13,726,000,000	$ 18,254,000,000
Release of loan loss reserve due to implementation of new guidance		(868,000,000)		(1,591,000,000)	(1,678,000,000)	(7,023,000,000)
Recorded investment in loans modified under the ASU				1,170,000,000		1,170,000,000
Allowance for credit losses associated with loans modified under the ASU				467,000,000		467,000,000
Impact of the adoption of ASU				60,000,000
Reserves released as a result of implementing the prohibition on valuation adjustments			125,000,000
Reduction in deferred tax asset due to change in accounting principle	165,000,000
Deferred tax asset recorded as a result of adoption of new accounting standards for deferred asset acquisition costs							58,000,000
Change in opening retained earning							107,000,000
OCC Chapter 7 Bankruptcy Guidance
New Accounting Pronouncements or Change in Accounting Principle
Incremental charge-offs due to implementation of new guidance		635,000,000
Release of loan loss reserve due to implementation of new guidance		600,000,000
Net reduction in pretax income due to implementation of new guidance		35,000,000
Increase in TDRs resulted from implementation of new guidance		1,700,000,000			1,700,000,000
Increase in non-accrual loans resulted from implementation of new guidance		1,500,000,000			1,500,000,000
Increase in current non-accrual loans resulted from implementation of new guidance		$ 1,300,000,000			$ 1,300,000,000