Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended	6 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013	Oct. 31, 2013	Jul. 31, 2014 Fiscal 2012 Restructuring Plan	Apr. 30, 2014 Fiscal 2012 Restructuring Plan	Jul. 31, 2014 Fiscal 2012 Restructuring Plan	May 31, 2014 Fiscal 2012 Restructuring Plan Minimum position	Jul. 31, 2014 Fiscal 2012 Restructuring Plan Minimum position	May 31, 2014 Fiscal 2012 Restructuring Plan Maximum position	Jul. 31, 2014 Fiscal 2012 Restructuring Plan Maximum position	May 31, 2014 Fiscal 2012 Restructuring Plan Severance and EER	Jul. 31, 2014 Fiscal 2012 Restructuring Plan Severance and EER position	Apr. 30, 2014 Fiscal 2012 Restructuring Plan Severance and EER position	Jul. 31, 2014 Fiscal 2012 Restructuring Plan Severance and EER position	Jul. 31, 2014 Fiscal 2012 Restructuring Plan Infrastructure and other items	Jul. 31, 2014 Fiscal 2012 Restructuring Plan Infrastructure and other items	Jul. 31, 2014 Other Plans	Jul. 31, 2014 Other Plans	Jul. 31, 2014 Other Plans Severance and workforce reductions	Jul. 31, 2014 Other Plans Infrastructure	Jul. 31, 2014 Other Plans Infrastructure
Restructuring Reserve
Balance at the beginning of the period			$ 1,117				$ 985	$ 985							$ 945	$ 945		$ 40		$ 132	$ 10		$ 122
Charges	649	81	1,015	619		648		1,012						562		817	86	195	1	3		1	3
Cash Payments			(1,050)					(999)								(861)		(138)		(51)	(3)		(48)
Other Adjustments and Non-Cash Settlements			(12)					(12)								(12)
Balance at the end of the period	1,070		1,070			986		986						889		889	97	97	84	84	7	77	77
Total Costs Incurred to Date			8,366					4,295								3,853		442		4,071	2,629		1,442
Total Expected Costs to Be Incurred			8,572				4,000	4,500								4,000		500		4,072	2,629		1,443
Increase in expected positions to be eliminated									11,000		16,000
Additional charge to the restructuring plan													500
Completion Date						Oct. 31, 2021													Oct. 31, 2019
Accrued restructuring	828		828		901
Other liabilities	$ 242		$ 242		$ 216
Expected positions to be eliminated										45,000		50,000		41,000	34,000
Positions eliminated														36,000		36,000