Fair Value Measurements - Level 3 Reconciliation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2013		Jan. 31, 2012		Oct. 31, 2012	Oct. 31, 2011
Guarantees [Member]
Fair Value Assets And Liablities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability) Beginning Value					$ (7)	$ (6)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	[1]	0	[1]
Fair Value, Level 3 Transfers out, Description	0		0
Issuances	0		(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability) Ending Value	(7)		(7)
Fair Value Change in Unrealized Gains on Assets and Liabilities Still Held	0		0
Commodity Contract [Member]
Fair Value Assets And Liablities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability) Beginning Value					0	(2)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	[1]	(1)	[1]
Fair Value, Level 3 Transfers out, Description	0		2
Issuances	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0		(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability) Ending Value	0		0
Fair Value Change in Unrealized Gains on Assets and Liabilities Still Held	$ 0		$ 0

[1] For commodity contracts, losses are included in Cost of products sold.