Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Guarantor and Non-Guarantor Parenthetical (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Defined benefit plan, tax	$ 0	$ 1	$ (1)	$ 1
Parent Company [Member]
Defined benefit plan, tax	0	1	(1)	1
Guarantor Subsidiaries [Member]
Defined benefit plan, tax	0	0	0	0
Non-Guarantor Subsidiaries [Member]
Defined benefit plan, tax	0	1	(1)	1
Consolidation, Eliminations [Member]
Defined benefit plan, tax	$ 0	$ (1)	$ 1	$ (1)