BASIS OF PRESENTATION (Details 2) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Jan. 31, 2012	Mar. 31, 2012	Sep. 30, 2011	Jan. 02, 2012
New Accounting Pronouncements or Change in Accounting Principle
Recorded investment in loans modified under the ASU			$ 1,170
Allowance for credit losses associated with loans modified under the ASU			467
Impact of the adoption of ASU			60
Reserves released as a result of implementing the prohibition on valuation adjustments		125
Reduction in deferred tax asset due to change in accounting principle	165
Deferred tax asset recorded as a result of adoption of new accounting standards for deferred asset acquisition costs				58
Change in opening retained earning				$ 107