Investments in and advances to non-consolidated affiliates (Details) (NC2 Global LLC [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
Jan. 31, 2011
NC2 Global LLC [Member]
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Net revenue	$ 49
Net expenses	67
Loss before tax expense	(18)
Net loss	$ (18)

The amount of net income (loss) reported by an equity method investment of the entity.

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+ Details