Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jan. 31, 2015
Current Income Tax Expense (Benefit), Continuing Operations
U.S. federal statutory tax rate	35.00%
Income Tax Contingency
Amount of unrecognized tax benefits that could affect the effect tax rate	$ 81.0
Lower range of estimated potential decreases in underlying uncertain tax positions	0
Upper range of estimated potential decreases in underlying uncertain tax positions	$ 4

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of (increase) decrease reasonably possible in the estimated lower bound of the unrecognized tax benefit for a tax position taken or expected to be taken.

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Amount of (increase) decrease reasonably possible in the estimated upper bound of the unrecognized tax benefit for a tax position taken or expected to be taken.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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