CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (PARENTHETICAL) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Income tax expense (benefit) from discontinued operations	$ 0	$ 18	$ (2)	$ 38

Income tax expense or benefit attributable to Income or Loss from discontinued operations during the phase-out period.

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