Fair Value Measurements - Financial Instruments Measured on Recurring Basis (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Oct. 31, 2012	Oct. 31, 2011
Total [Member]
Derivative financial instruments:
Total assets	$ 466	$ 722
Derivative financial instruments:
Guarantees	7	6
Total liabilities	11	16
Total [Member] | Commodity Contract [Member]
Derivative financial instruments:
Asset derivatives		1
Derivative financial instruments:
Liability derivatives	4	6
Total [Member] | Foreign Currency Contract [Member]
Derivative financial instruments:
Asset derivatives		3
Total [Member] | Cross Currency Interest Rate Contract [Member]
Derivative financial instruments:
Liability derivatives		4
Total [Member] | US Treasury Bill Securities [Member]
Assets
Available-for-sale securities	420	283
Total [Member] | Other US and Non-US Government Bonds [Member]
Assets
Available-for-sale securities		415
Total [Member] | Other [Member]
Assets
Available-for-sale securities	46	20
Fair Value, Inputs, Level 1 [Member]
Derivative financial instruments:
Total assets	466	718
Derivative financial instruments:
Guarantees	0	0
Total liabilities	0	0
Fair Value, Inputs, Level 1 [Member] | Commodity Contract [Member]
Derivative financial instruments:
Asset derivatives		0
Derivative financial instruments:
Liability derivatives	0	0
Fair Value, Inputs, Level 1 [Member] | Foreign Currency Contract [Member]
Derivative financial instruments:
Asset derivatives		0
Fair Value, Inputs, Level 1 [Member] | Cross Currency Interest Rate Contract [Member]
Derivative financial instruments:
Liability derivatives		0
Fair Value, Inputs, Level 1 [Member] | US Treasury Bill Securities [Member]
Assets
Available-for-sale securities	420	283
Fair Value, Inputs, Level 1 [Member] | Other US and Non-US Government Bonds [Member]
Assets
Available-for-sale securities		415
Fair Value, Inputs, Level 1 [Member] | Other [Member]
Assets
Available-for-sale securities	46	20
Fair Value, Inputs, Level 2 [Member]
Derivative financial instruments:
Total assets	0	3
Derivative financial instruments:
Guarantees	0	0
Total liabilities	4	7
Fair Value, Inputs, Level 2 [Member] | Commodity Contract [Member]
Derivative financial instruments:
Asset derivatives		0
Derivative financial instruments:
Liability derivatives	4	3
Fair Value, Inputs, Level 2 [Member] | Foreign Currency Contract [Member]
Derivative financial instruments:
Asset derivatives		3
Fair Value, Inputs, Level 2 [Member] | Cross Currency Interest Rate Contract [Member]
Derivative financial instruments:
Liability derivatives		4
Fair Value, Inputs, Level 2 [Member] | US Treasury Bill Securities [Member]
Assets
Available-for-sale securities	0	0
Fair Value, Inputs, Level 2 [Member] | Other US and Non-US Government Bonds [Member]
Assets
Available-for-sale securities		0
Fair Value, Inputs, Level 2 [Member] | Other [Member]
Assets
Available-for-sale securities	0	0
Fair Value, Inputs, Level 3 [Member]
Derivative financial instruments:
Total assets	0	1
Derivative financial instruments:
Guarantees	7	6
Total liabilities	7	9
Fair Value, Inputs, Level 3 [Member] | Commodity Contract [Member]
Derivative financial instruments:
Asset derivatives		1
Derivative financial instruments:
Liability derivatives	0	3
Fair Value, Inputs, Level 3 [Member] | Foreign Currency Contract [Member]
Derivative financial instruments:
Asset derivatives		0
Fair Value, Inputs, Level 3 [Member] | Cross Currency Interest Rate Contract [Member]
Derivative financial instruments:
Liability derivatives		0
Fair Value, Inputs, Level 3 [Member] | US Treasury Bill Securities [Member]
Assets
Available-for-sale securities	0	0
Fair Value, Inputs, Level 3 [Member] | Other US and Non-US Government Bonds [Member]
Assets
Available-for-sale securities		0
Fair Value, Inputs, Level 3 [Member] | Other [Member]
Assets
Available-for-sale securities	$ 0	$ 0