Income Taxes - Components of Income Tax Benefit (Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Current:
Federal	$ (4)	$ 2	$ 3
State and local	10	11	(1)
Foreign	58	(4)	47
Total current benefit (expense)	64	9	49
Deferred:
Federal	(219)	1,841	(1,380)
State and local	(2)	137	(108)
Foreign	(14)	(207)	22
Total deferred benefit (expense)	(235)	1,771	(1,466)
Recorded income tax benefit (expense)	$ (171)	$ 1,780	$ (1,417)