Retirement and Post-Retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Oct. 31, 2012
Non US Pension Plans
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2013			$ 674
Contributions to benefit plans	181
Expected contribution to benefit plans as of balance sheet date	493
U.S. Defined Benefit Plans
Net benefit (credit) cost
Interest cost	140	141
Expected return on plan assets	(211)	(198)
Amortization and deferrals:
Actuarial loss (gain)	20	11
Net periodic benefit (credit) cost	(51)	(46)
Settlements loss (gain)	5
Net benefit (credit) cost	(46)	(46)
Non-U.S. Defined Benefit Plans
Net benefit (credit) cost
Service cost	86	74
Interest cost	172	176
Expected return on plan assets	(257)	(208)
Amortization and deferrals:
Actuarial loss (gain)	87	60
Prior service benefit	(7)	(6)
Net periodic benefit (credit) cost	81	96
Special termination benefits	3	1
Settlements loss (gain)		(28)
Net benefit (credit) cost	84	69
U.S. non-qualified plan participants
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2013			33
Contributions to benefit plans	14
Expected contribution to benefit plans as of balance sheet date	19
Post-Retirement Benefit Plans
Net benefit (credit) cost
Service cost	2	2
Interest cost	8	8
Expected return on plan assets	(8)	(9)
Amortization and deferrals:
Actuarial loss (gain)		(1)
Prior service benefit	(17)	(21)
Net periodic benefit (credit) cost	(15)	(21)
Curtailment loss (gain)	(3)
Net benefit (credit) cost	(18)	(21)
Future Contributions and Funding Policy
Expected contribution to defined benefit plans in fiscal 2013			124
Contributions to benefit plans	25
Expected contribution to benefit plans as of balance sheet date	$ 99