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The weighted average exercise price assumed as of the balance sheet date for calculating the average fair value as of the date of grant.

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The weighted average price, as of the balance sheet date, for other grants at which grantees can acquire the shares reserved for issuance under the plan during the reporting period.

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

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Represents the expense recognized during the period arising from share-based compensation arrangements (for example, shares of stock, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate proceeds received by the entity during the annual period from exercises of stock options and conversion of similar instruments granted under share-based payment arrangements.

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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 weighted average period over which unrecognized compensation is expected to be recognized for share-based compensation plans, using a decimal to express in number of years.

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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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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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Discloses use of the simplified method to calculate the expected term that stock option awards under the specified plan will exist before being exercised or terminated, the reason and justification for its use, and the periods for which the method was used if it was not used in all periods presented.

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

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The maximum number of shares originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the share-based compensation plan. As stock options and equity instruments other than options are awarded to participants, the shares remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares already issued upon exercise of options or other share-based awards under the plan, and 2) shares reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance-sheet date.

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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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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The weighted average period between the balance-sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

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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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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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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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The quantity of shares issuable on stock options awarded under the plan during the reporting period.

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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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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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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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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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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.

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Stock-Based Compensation (Detail 3) (USD $) In Millions, except Share data, unless otherwise specified			12 Months Ended									1 Months Ended	12 Months Ended
	Dec. 31, 2010	May 31, 2008	Dec. 31, 2010 Stock Option Program years	Dec. 31, 2009 Stock Option Program	Dec. 31, 2008 Stock Option Program	Dec. 31, 2010 Stock Option Program Annual	Dec. 31, 2009 Stock Option Program Annual	Dec. 31, 2008 Stock Option Program Annual	Dec. 31, 2010 Stock Option Program Progressive (Reload)	Dec. 31, 2009 Stock Option Program Progressive (Reload)	Dec. 31, 2008 Stock Option Program Progressive (Reload)	May 31, 1997 General employees' Stock Purchase Plan (GESPP)	Dec. 31, 2010 General employees' Stock Purchase Plan (GESPP)	Dec. 31, 2009 General employees' Stock Purchase Plan (GESPP)	Dec. 31, 2008 General employees' Stock Purchase Plan (GESPP)
Stock Option Program
Beginning balance			74,268,165	75,452,722	74,613,051
Granted - Annual			5,788,313	6,649,672	5,239,660								1,325,579	1,655,936	1,624,775
Granted - Progressive (Reload)			188,105	68,189	78,371
Granted - Other			27,911	4,654	20,389
Exercised			(9,678,654)	(6,930,544)	(3,797,663)								(1,325,579)	(1,655,936)	(1,624,775)
Canceled			(258,796)	(976,528)	(701,086)
Ending balance			70,335,004	74,268,165	75,452,722
Shares - Shares available for grant	31,825,085												4,334,360	5,659,939	7,315,875
Weighted average exercise price - Beginning balance			$ 72.39	$ 71.96	$ 70.50
Weighted average exercise price - Annual grants			$ 78.79	$ 53.93	$ 77.22								$ 70.57	$ 50.58	$ 62.68
Weighted average exercise price - Progressive (Reload)			$ 88.67	$ 77.37	$ 79.53
Weighted average exercise price - Other			$ 82.13	$ 50.85	$ 79.25
Weighted average exercise price - Exercised			$ 59.11	$ 49.83	$ 49.38								$ 70.57	$ 50.58	$ 62.68
Weighted average exercise price - Canceled			$ 70.76	$ 73.50	$ 79.12
Weighted average exercise price - Ending balance			$ 74.80	$ 72.39	$ 71.96
Options exercisable			58,201,617	62,414,398	63,282,408
Options exercisable, exercise price			$ 75.87	$ 73.73	$ 70.01
Weighted Average Remaining Contractual Life for options outstanding (in months)			56
Aggregate Intrinsic Value for options outstanding			$ 821
Weighted Average Remaining Contractual Life for options exercisable (in months)			47
Aggregate Instrinsic Value for options exercisable			619
Compensation expense yet to be recognized for stock options			65
Weighted average life of remaining vesting period for stock options (in years)			1.7
Total intrinsic value of stock options exercised			263	108	107
Cash received from options exercised			571	345	188
Tax benefit realized from exercise of stock options			93	38	34
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology
Weighted average exercise price						$ 78.72	$ 54.11	$ 77.22	$ 86.72	$ 77.83	$ 79.76
Risk-free interest rate						2.80%	2.20%	3.10%	0.60%	1.40%	4.30%
Dividend yield						2.50%	2.30%	2.00%	2.50%	2.00%	2.00%
Expected volatility						25.70%	30.30%	21.70%	33.20%	30.70%	18.70%
Expected life (months)						72	71	70	17	32	25
Weighted average fair value						$ 16.50	$ 13.00	$ 15.28	$ 12.01	$ 14.47	$ 12.00		$ 12.45	$ 8.93	$ 11.06
Number of shares authorized	64,000,000	35,000,000										30,000,000
Option price, percentage of market value at date of grant												85.00%
Option price, discount from market value at date of grant													15.00%
Stock-based compensation programs expense													$ 17	$ 15	$ 18