Retirement and Post-Retirement Benefit Plans (Details 4) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended									6 Months Ended		12 Months Ended
	Jan. 31, 2012	Oct. 31, 2012 2012 EER	Oct. 31, 2013 2012 EER employee	Oct. 31, 2013 U.S. Defined Benefit Plans	Oct. 31, 2012 U.S. Defined Benefit Plans	Oct. 31, 2011 U.S. Defined Benefit Plans	Oct. 31, 2013 U.S. Defined Benefit Plans 2012 EER Minimum	Oct. 31, 2013 U.S. Defined Benefit Plans 2012 EER Maximum	Oct. 31, 2013 Non-U.S. Defined Benefit Plans	Oct. 31, 2012 Non-U.S. Defined Benefit Plans	Oct. 31, 2011 Non-U.S. Defined Benefit Plans	Oct. 31, 2012 RMSA 2012 EER	Oct. 31, 2012 RMSA 2012 EER Maximum	Oct. 31, 2013 Post-Retirement Benefit Plans	Oct. 31, 2012 Post-Retirement Benefit Plans	Oct. 31, 2011 Post-Retirement Benefit Plans
Weighted average assumptions used to calculate net benefit (credit) cost
Discount rate (as a percent)				4.10%	4.80%	5.60%			3.80%	4.50%	4.40%			3.00%	4.40%	4.40%
Expected increase in compensation levels (as a percent)				2.00%	2.00%	2.00%			2.40%	2.50%	2.50%
Expected long-term return on assets (as a percent)				7.80%	7.60%	8.00%			7.20%	6.40%	6.80%			9.00%	10.00%	10.50%
Change in fair value of plan assets:
Fair value - beginning of year				$ 11,536,000,000	$ 10,662,000,000				$ 14,021,000,000	$ 13,180,000,000				$ 395,000,000	$ 394,000,000
Acquisition/addition of plans									7,000,000	8,000,000
Actual return on plan assets				629,000,000	1,411,000,000				1,842,000,000	1,327,000,000				32,000,000	36,000,000
Employer contributions				54,000,000	50,000,000				634,000,000	582,000,000			12,000	102,000,000	31,000,000
Participant contributions									63,000,000	57,000,000				72,000,000	59,000,000
Benefits paid				(1,320,000,000)	(556,000,000)				(504,000,000)	(462,000,000)				(205,000,000)	(125,000,000)
Settlement				(33,000,000)	(31,000,000)				(96,000,000)	(193,000,000)
Currency impact									116,000,000	(478,000,000)
Fair value - end of year				10,866,000,000	11,536,000,000	10,662,000,000			16,083,000,000	14,021,000,000	13,180,000,000			396,000,000	395,000,000	394,000,000
Change in benefit obligation:
Projected benefit obligation - beginning of year				14,237,000,000	11,945,000,000				18,097,000,000	16,328,000,000				1,056,000,000	816,000,000
Acquisition/addition of plans									14,000,000	25,000,000
Service cost				1,000,000	1,000,000	1,000,000			337,000,000	294,000,000	343,000,000			6,000,000	7,000,000	9,000,000
Interest cost				560,000,000	566,000,000	594,000,000			676,000,000	690,000,000	694,000,000			31,000,000	35,000,000	35,000,000
Participant contributions									63,000,000	57,000,000				72,000,000	59,000,000
Actuarial (gain) loss				(1,579,000,000)	1,479,000,000				343,000,000	2,143,000,000				(85,000,000)	34,000,000
Benefits paid				(1,320,000,000)	(556,000,000)				(504,000,000)	(462,000,000)				(205,000,000)	(125,000,000)
Plan amendments									6,000,000	(67,000,000)
Curtailment									13,000,000	5,000,000					5,000,000
Settlement				(33,000,000)	(31,000,000)				(100,000,000)	(395,000,000)
Special termination benefits			(833,000,000)		833,000,000				31,000,000	17,000,000	16,000,000	(227,000,000)		(5,000,000)	227,000,000
Currency impact									176,000,000	(538,000,000)				(3,000,000)	(2,000,000)
Projected benefit obligation - end of year				11,866,000,000	14,237,000,000	11,945,000,000			19,152,000,000	18,097,000,000	16,328,000,000			867,000,000	1,056,000,000	816,000,000
Funded status at end of year				(1,000,000,000)	(2,701,000,000)				(3,069,000,000)	(4,076,000,000)				(471,000,000)	(661,000,000)
Accumulated benefit obligation				11,865,000,000	14,236,000,000				18,254,000,000	17,070,000,000
Weighted average assumptions used to calculate the projected benefit obligations
Discount rate (as a percent)				4.90%	4.10%				3.90%	3.80%				3.90%	3.00%
Expected increase in compensation levels (as a percent)				2.00%	2.00%				2.40%	2.40%
Net amounts recognized for defined benefit and post-retirement benefit plans in Consolidated Balance Sheets
Noncurrent assets									479,000,000	260,000,000
Current liabilities				(33,000,000)	(33,000,000)				(46,000,000)	(39,000,000)				(109,000,000)	(124,000,000)
Noncurrent liabilities				(967,000,000)	(2,668,000,000)				(3,502,000,000)	(4,297,000,000)				(362,000,000)	(537,000,000)
Funded status at end of year				(1,000,000,000)	(2,701,000,000)				(3,069,000,000)	(4,076,000,000)				(471,000,000)	(661,000,000)
Pretax net actuarial loss (gain) and prior service benefit recognized in accumulated other comprehensive loss for defined benefit and post-retirement benefit plans
Net actuarial loss (gain)				377,000,000					4,220,000,000					(96,000,000)
Prior service benefit									(231,000,000)					(161,000,000)
Total recognized in accumulated other comprehensive loss (income)				377,000,000					3,989,000,000					(257,000,000)
Net actuarial loss (gain) and prior service benefit that are expected to be amortized from accumulated other comprehensive loss (income) and recognized as components of net periodic benefit cost (credit)
Net actuarial loss (gain)				(16,000,000)					(311,000,000)					10,000,000
Prior service benefit									(24,000,000)					(41,000,000)
Total expected to be recognized in net periodic benefit cost (credit)				16,000,000					287,000,000					(51,000,000)
Defined benefit plans with projected benefit obligations exceeding the fair value of plan assets
Aggregate fair value of plan assets				10,866,000,000	11,536,000,000				10,462,000,000	10,283,000,000
Aggregate projected benefit obligation				11,866,000,000	14,237,000,000				14,010,000,000	14,618,000,000
Defined benefit plans with accumulated benefit obligations exceeding the fair value of plan assets
Aggregate fair value of plan assets				10,866,000,000	11,536,000,000				9,926,000,000	10,193,000,000
Aggregate accumulated benefit obligation				11,865,000,000	14,236,000,000				12,703,000,000	13,645,000,000
Net gain recognized due to transfer of substitutional portion of entity's Japan pension to Japanese government	28,000,000
Settlement loss related to transfer of substitutional portion of entity's Japan pension to Japanese government	150,000,000
Government subsidy related to transfer of substitutional portion of entity's Japan pension to Japanese government	178,000,000
Elimination of pension obligations included in government subsidy	344,000,000
Transfer of pension assets included in government subsidy	166,000,000
Combined age and service required for each employee participating in the restructuring plan			65 years
Number of employees who participated			8,500
Period for calculation of lump sum payment							5 months	14 months
Special termination benefits			(833,000,000)		833,000,000				31,000,000	17,000,000	16,000,000	(227,000,000)		(5,000,000)	227,000,000
Maximum period for continuing health care coverage at active employee contribution rates for participating employees in restructuring plan			24 months
Contributions to benefit plans				54,000,000	50,000,000				634,000,000	582,000,000			12,000	102,000,000	31,000,000
Curtailment (gain) loss		$ (30,000,000)							$ (3,000,000)	$ 4,000,000		$ (37,000,000)		$ (7,000,000)	$ (30,000,000)