Discontinued Operations - Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	9 Months Ended
Feb. 28, 2013	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Statements of Operations for Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 33	$ 19
Asset Impairment Charges		24
Income (loss) from discontinued operations, net of tax		(10)	4	(40)	(39)
Gain (Loss) on Sale of Business				26
Segment, Discontinued Operations [Member]
Statements of Operations for Discontinued Operations [Line Items]
Sales and revenues, net		3	73	73	153
Loss before income taxes		(10)	(5)	(40)	(62)
Income tax benefit		0	9	0	23
Income (loss) from discontinued operations, net of tax		$ (10)	$ 4	$ (40)	$ (39)

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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- Definition

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

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- Definition

Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

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