QUARTERLY FINANCIAL DATA (UNAUDITED) - U.S. Deferred Tax Assets Valuation Allowance (Details) $ in Millions	3 Months Ended
Jan. 31, 2016 USD ($)
U.S.
Valuation allowance
Change in valuation allowance, benefit	$ 1,007

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e32123-109318

Name:	us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration