Fair Value Measurements - Level 3 Reconciliation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Jul. 31, 2014 Guarantees [Member]	Jul. 31, 2013 Guarantees [Member]	Jul. 31, 2014 Guarantees [Member]	Jul. 31, 2013 Guarantees [Member]	Jul. 31, 2014 Commodity Contract [Member]	Jul. 31, 2013 Commodity Contract [Member]	Jul. 31, 2014 Commodity Contract [Member]	Jul. 31, 2013 Commodity Contract [Member]	Jan. 31, 2014 NA Truck [Member] Amortizing Intangible Assets and Long-Lived Assets [Domain]
Fair Value Assets And Liablities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Other Assets									$ 18
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability) Beginning Value	(6)	(7)	(6)	(7)	0	0	0	0
Transfers out of Level 3	0	0	0	0	0	0	0	0
Issuances	0	0	0	0	0	0	0	0
Settlements	0	0	0	0	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability) Ending Value	(6)	(7)	(6)	(7)	0	0	0	0
Change in unrealized gains on assets and liabilities still held	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0