Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Oct. 31, 2013
Restructuring Reserve
Balance at the beginning of the period	$ 1,117
Charges	114	130
Cash Payments	(381)
Other Adjustments and Non-Cash Settlements	4
Balance at the end of the period	854
Total Costs Incurred to Date	7,465
Total Expected Costs to Be Incurred	8,172
Short-term portion of restructuring reserve, recorded in Accrued restructuring	630		901
Long-term portion of restructuring reserve, recorded in Other liabilities	224		216
Fiscal 2012 Restructuring Plan
Restructuring Reserve
Balance at the beginning of the period	985
Charges	115
Cash Payments	(368)
Other Adjustments and Non-Cash Settlements	4
Balance at the end of the period	736
Total Costs Incurred to Date	3,398
Total Expected Costs to Be Incurred	4,100
Expected positions to be eliminated	34,000
Positions eliminated	28,300
Fiscal 2012 Restructuring Plan | Severance and EER
Restructuring Reserve
Balance at the beginning of the period	945
Charges	59
Cash Payments	(333)
Other Adjustments and Non-Cash Settlements	4
Balance at the end of the period	675
Total Costs Incurred to Date	3,095
Fiscal 2012 Restructuring Plan | Infrastructure and other items
Restructuring Reserve
Balance at the beginning of the period	40
Charges	56
Cash Payments	(35)
Balance at the end of the period	61
Total Costs Incurred to Date	303
Total Expected Costs to Be Incurred	600
Other Plans
Restructuring Reserve
Balance at the beginning of the period	132
Charges	(1)
Cash Payments	(13)
Balance at the end of the period	118
Total Costs Incurred to Date	4,067
Total Expected Costs to Be Incurred	4,072
Expected additional cost in future period	5
Other Plans | Severance and workforce reductions
Restructuring Reserve
Balance at the beginning of the period	10
Cash Payments	(2)
Balance at the end of the period	8
Total Costs Incurred to Date	2,629
Total Expected Costs to Be Incurred	2,629
Other Plans | Infrastructure
Restructuring Reserve
Balance at the beginning of the period	122
Charges	(1)
Cash Payments	(11)
Balance at the end of the period	110
Total Costs Incurred to Date	1,438
Total Expected Costs to Be Incurred	$ 1,443