The percentage of the target shares used to determine the number of shares to be released under a performance-based compensation plan, representing the high end of the range.

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The percentage of the target shares used to determine the number of shares to be released under a performance-based compensation plan, representing the low end of the range.

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The number of shares under a share-based award plan that represent an increase (decrease) due to changes in performance achievement or market conditions.

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The number of shares under a share-based award plan other than a stock option plan for which the entity is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria and for which a fair value is calculated. This number differs from the total number of contingently issuable shares by the number of shares for which the performance target criteria has not yet been established.

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The length of time during which the performance of the entity is measured, for purposes of determining the amount of stock based compensation units to be awarded.

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As of the balance-sheet date, the aggregate unrecognized cost of share-based awards made to employees under share-based compensation plans that have yet to vest.

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The total recognized tax benefit related to compensation cost for share-based payment arrangements recognized in income during the period.

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The weighted average period over which unrecognized share-based compensation costs are expected to be reported.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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The number of shares under a share-based award plan other than a stock option plan that were settled during the reporting period due to a failure to satisfy vesting conditions pertaining to all option plans.

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The weighted average fair value as of the grant date of share-based award plans other than stock option plans that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event specified in the contractual agreement of the plan.

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The number of shares issuable under a share-based award plan pertaining to grants made during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

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The weighted average fair value at grant for nonvested share-based awards issued during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

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The number of outstanding awards on nonstock option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on share-based plans excluding option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

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The decrease in the number of shares potentially issuable under a share-based award plan pertaining to awards for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement.

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The weighted average fair value as of grant dates pertaining to a share-based award plan other than a stock option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The period of time a share-based award is expected to be outstanding. A share-based award's expected term shall be determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. An entity is required to aggregate individual awards into relatively homogeneous groups.

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-Paragraph A240
-Subparagraph e(2)(a)

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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section D
-Subsection 2

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The estimated measure of the percentage amount by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph A240
-Subparagraph e(2)(d)

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The number of shares into which fully or partially vested stock options outstanding as of the balance-sheet date can be currently converted under the option plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph A240
-Subparagraph b(1)(c), d(2)

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- Definition

The decrease in the number of reserved shares that could potentially be issued attributable to the exercise or conversion during the reporting period of previously issued stock options under the option plan.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph A240
-Subparagraph b(1)(e)

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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-Paragraph A240
-Subparagraph c(2)

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- Definition

The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph A240
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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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- Definition

For presentations that combine terminations, the weighted average price of expired options and the price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period .

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- Definition

The quantity of shares issuable on stock options awarded under the plan during the reporting period.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

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-Publisher FASB
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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph A240
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- Definition

The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance-sheet date.

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-Publisher FASB
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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance-sheet date, including vested options.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Publisher FASB
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph A240
-Subparagraph b(1)(a)

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- Definition

The weighted average period between the balance-sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

+ References

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-Publisher FASB
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-Paragraph A240
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- Definition

As of the balance sheet date, the total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options that are exercisable.

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- Definition

As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest.

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- Definition

The weighted-average period between the balance-sheet date and expiration date for fully vested and expected to vest options that are exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph A240
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- Definition

As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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-Publisher FASB
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-Paragraph A240
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- Definition

As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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- Definition

The weighted-average period between the balance-sheet date and expiration date for fully vested and expected to vest options outstanding, which may be expressed in a decimal value for number of years.

+ References

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-Publisher FASB
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Balance Type:	na
Period Type:	duration

Stock-Based Compensation (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010	Oct. 31, 2010
Stock Based Compensation Expense
Stock-based compensation expense	$ 148	$ 166	$ 475	$ 547
Income tax benefit from stock-based compensation	46	54	150	176
Performance-based Restricted Units (PRUs)
Share-based compensation arrangements by share-based payment award
Performance period to determine share based awards (in years)			3
Percentage of performance target, low end of range (as a percent)			0.00%
Percentage of performance target, high end of range (as a percent)			200.00%
Weighted average assumptions used to determine fair values
Weighted-average grant date fair value of shares granted (in dollars per share)			$ 27.59	$ 57.13
Expected or implied volatility (as a percent)			30.00%	38.00%
Risk-free interest rate (as a percent)			0.38%	0.73%
Dividend yield (as a percent)			0.75%	0.64%
Expected life (in months)			19	22
PRUs and Restricted Stock Activity:
Outstanding at the beginning of the period (in shares)			18,508
Granted (in shares)			5,950
Vested (in shares)			0
Change in units due to performance and market conditions achievement for PRUs vested in the period (in shares)			0
Forfeited (in shares)			(1,637)
Outstanding at the end of the period (in shares)	22,821		22,821
Outstanding Target shares assigned a fair value (in shares)	17,098		17,098
Stock Activity
Unrecognized pre-tax stock-based compensation expense	177		177
Remaining weighted-average vesting period (in years)			1.2
Stock Options
Weighted average assumptions used to determine fair values
Weighted average fair value of grants per share (in dollars per share)	$ 8.44	$ 13.66	$ 10.24	$ 14.04
Expected or implied volatility (as a percent)	28.00%	32.00%	28.00%	29.00%
Risk-free interest rate (as a percent)	1.64%	1.96%	1.87%	2.29%
Dividend yield (as a percent)	1.34%	0.69%	0.94%	0.64%
Expected life (in months)	61	60	60	61
Option activity:
Outstanding at the beginning of the period (in shares)			142,916
Granted and assumed through acquisition (in shares)			1,243
Exercised (in shares)			(33,736)
Forfeited/cancelled/expired (in shares)			(3,311)
Outstanding at the end of the period (in shares)	107,112		107,112
Weighted-average exercise price of shares outstanding (in dollars per share)	$ 29		$ 29		$ 28
Weighted-average exercise price of shares granted (in dollars per share)	$ 24		$ 24
Weighted-average exercise price of shares exercised (in dollars per share)	$ 24		$ 24
Weighted-average exercise price of shares forfeited, cancelled or expired (in dollars per share)			$ 41
Weighted-average remaining contractual term of shares outstanding (in years)			2.5
Aggregate intrinsic value of shares outstanding	961		961
Shares vested and expected to vest (in shares)	106,145		106,145
Weighted-average exercise price of shares vested and expected to vest (in dollars per share)	$ 29		$ 29
Weighted-average remaining contractual term of shares vested and expected to vest (in years)			2.5
Aggregate intrinsic value of shares vested and expected to vest	951		951
Shares exercisable (in shares)	100,333		100,333
Weighted-average exercise price of exercisable options (in dollars per share)	$ 29		$ 29
Weighted-average remaining contractual term of exercisable options (in years)			2.1
Aggregate intrinsic value of exercisable options	890		890
Aggregate intrinsic value of options exercised	42		648
Stock Activity
Unrecognized pre-tax stock-based compensation expense	188		188
Remaining weighted-average vesting period (in years)			1.8
Restricted Stock Awards
Weighted average assumptions used to determine fair values
Weighted-average grant date fair value of shares granted (in dollars per share)			$ 41
PRUs and Restricted Stock Activity:
Outstanding at the beginning of the period (in shares)			5,848
Granted (in shares)			9,156
Vested (in shares)			(2,870)
Forfeited (in shares)			(651)
Outstanding at the end of the period (in shares)	11,483		11,483
Weighted-average grant date fair value, beginning of period (in dollars per share)			$ 45
Weighted-average grant date fair value of shares vested (in dollars per share)			$ 45
Weighted-average grant date fair value of shares forfeited (in dollars per share)	$ 44		$ 44
Weighted-average grant date fair value, end of period (in dollars per share)	$ 42		$ 42
Stock Activity
Unrecognized pre-tax stock-based compensation expense	$ 367		$ 367
Remaining weighted-average vesting period (in years)			1.6