Retirement and Post-Retirement Benefit Plans (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
U.S. Defined Benefit Plans
Net benefit (gain) cost
Service cost	$ 1	$ 1	$ 27
Interest cost	594	578	592
Expected return on plan assets	(744)	(662)	(533)
Amortization and deferrals:
Actuarial loss (gain)	33	27	(72)
Net periodic benefit (gain) cost	(116)	(56)	14
Settlement loss (gain)	3	7	(1)
Net benefit (gain) cost	(113)	(49)	13
Non-U.S. Defined Benefit Plans
Net benefit (gain) cost
Service cost	343	319	312
Interest cost	694	658	619
Expected return on plan assets	(890)	(756)	(669)
Amortization and deferrals:
Actuarial loss (gain)	235	214	71
Prior service benefit	(14)	(11)	(9)
Net periodic benefit (gain) cost	368	423	324
Curtailment (gain) loss		(6)	5
Settlement loss (gain)	9	7	12
Special termination benefits	(16)	(29)	(55)
Net benefit (gain) cost	393	453	396
Post-Retirement Benefit Plans
Net benefit (gain) cost
Service cost	9	12	14
Interest cost	35	47	70
Expected return on plan assets	(37)	(32)	(32)
Amortization and deferrals:
Actuarial loss (gain)	3	14	6
Prior service benefit	(83)	(87)	(78)
Net periodic benefit (gain) cost	(73)	(46)	(20)
Curtailment (gain) loss		(13)	(2)
Net benefit (gain) cost	$ (73)	$ (59)	$ (22)