Financial Instruments-Reclassifications (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ 62	$ 365	$ 96	$ 591
Net revenue	11,588	12,977	23,834	26,835
Cost of revenue	9,338	10,415	19,299	21,588
Interest and other, net	(5)	(78)	(99)	(199)
Earnings from continuing operations before taxes	836	919	1,670	1,916
Pre-tax effect of derivative instruments not designated as hedging instruments on the Consolidated Condensed Statements of Earnings
Gain (Loss) recognized in income on derivatives not designated as hedges	(22)	(5)	(9)	60
Change in unrealized (losses) gains on cash flow hedges \| Reclassifications of losses (gains) into earnings
Pre-tax effect of derivative instruments in cash flow hedging relationships
Net revenue	(88)	(410)	(166)	(665)
Cost of revenue	32	44	72	72
Other operating expenses		(1)		(2)
Interest and other, net	(6)		(2)
Earnings from continuing operations before taxes	(62)	(365)	(96)	(591)
Interest rate contracts \| Interest and other, net
Pre-tax effect of derivative instruments and related hedged items in a fair value hedging relationship
(Loss) Gain Recognized in Income on Derivative	4	(80)	18	61
(Loss) Gain recognized in Income on Related Hedged Item	(4)	80	(18)	(61)
Foreign currency contracts \| Interest and other, net
Pre-tax effect of derivative instruments not designated as hedging instruments on the Consolidated Condensed Statements of Earnings
Gain (Loss) recognized in income on derivatives not designated as hedges	(29)	(4)	(8)	63
Other derivatives \| Interest and other, net
Pre-tax effect of derivative instruments not designated as hedging instruments on the Consolidated Condensed Statements of Earnings
Gain (Loss) recognized in income on derivatives not designated as hedges	7	(1)	(1)	(3)
Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)	(145)	(18)	(40)	613
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		556		890
Loss expected to be reclassified from Accumulated OCI into earnings in next 12 months			$ 209
Cash flow hedges \| Discontinued Operations.
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		191		299
Cash flow hedges \| Foreign currency contracts
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)	$ (145)
Cash flow hedges \| Foreign currency contracts \| Continuing Operations
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)		(22)		381
Cash flow hedges \| Foreign currency contracts \| Discontinued Operations.
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)		4		232
Net investment hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)		(6)		123
Net investment hedges \| Foreign currency contracts \| Discontinued Operations.
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)		$ (6)		$ 123

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
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Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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