NEW ACCOUNTING PRONOUNCEMENTS - Statement of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Apr. 30, 2016	Apr. 30, 2015	Jul. 31, 2016	Jul. 31, 2015
Net cash provided by (used in) operating activities					$ 559	$ 271
Net cash used in financing activities					$ (212)	(1,056)
As Previously Reported
Net cash provided by (used in) operating activities	$ 104	$ (20)	$ 360	$ 163
Net cash used in financing activities	(132)	(828)	(102)	(929)
As Adjusted
Net cash provided by (used in) operating activities	111	(9)	365	175		271
Net cash used in financing activities	$ (139)	$ (839)	$ (107)	$ (941)		(1,056)
As Revised
Net cash provided by (used in) operating activities						254
Net cash used in financing activities						$ (1,039)