STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Change in unrealized gain on investments	$ 2	$ (8)	$ 0
Gain and loss on derivative instruments	2	3	0
Reclassification of (gains) and losses into earnings related to derivative instruments	(3)	(2)	(2)
Net loss	114	(61)	(3)
Net prior service loss	$ (16)	$ (17)	$ 0