Postretirement Benefits Expected Future Benefit Payments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended						12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2012 Pension Plans, Defined Benefit [Member]	Oct. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]		Oct. 31, 1993 Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Cost Recognized	$ 41	$ 33	$ 31
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months				326	135	[1]
Defined Benefit Plan, Expected Future Benefit Payments, Year Two				318	132	[1]
Defined Benefit Plan, Expected Future Benefit Payments, Year Three				308	134	[1]
Defined Benefit Plan, Expected Future Benefit Payments, Year Four				301	127	[1]
Defined Benefit Plan, Expected Future Benefit Payments, Year Five				294	121	[1]
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter				$ 1,362	$ 543	[1]
Contribution To The Trust Shares							25.5

[1] (A)Payments are net of expected participant contributions and expected federal subsidy receipts.