Condensed Consolidating Guarantor and Non-Guarantor - Guarantor and Non-Guarantor Parenthetical (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Portion Attributable to Parent	$ (1)	$ 12	$ (1)	$ 24
Parent Company [Domain]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Portion Attributable to Parent	(1)	12	(1)	24
Guarantor Subsidiaries [Domain]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Portion Attributable to Parent	0	12	0	23
Non-Guarantor Subsidiaries [Domain]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Portion Attributable to Parent	(1)	0	(1)	1
Consolidation, Eliminations [Domain]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Portion Attributable to Parent	$ 1	$ (12)	$ 1	$ (24)