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Amount payable at end of three year performance period minimum.

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Initial value of performance awards.

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The number of years after grant until option awards expire.

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Performance award vesting period.

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The period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition.

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

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-Section 30

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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

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

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The weighted average period over which unrecognized compensation is expected to be recognized for equity-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 number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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

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The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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

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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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Net number of share options (or share units) granted during the period.

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Share-Based Compensation And Other Compensation Arrangements (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended			12 Months Ended
	Feb. 28, 2011	Feb. 28, 2010	Feb. 28, 2009	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares of stock available for issuance				80,000,000
Number of options granted to our executives	5,426,910	5,932,806	7,423,242	5,658,705
Stock options vesting percentage after the first year				34.00%
Stock options vesting percentage after the second year				33.00%
Stock options vesting percentage after the third year				33.00%
Share based payment award options expiration term, in years				10
Stock options vesting period (years)				3
Total intrinsic value of options exercised				$ 67	$ 59	$ 2
Cash received from options exercised				114	87	10
Tax benefit realized from exercise of stock options				23	20	1
Stock option plan is expected to be recognized over a weighted average period (Years)				1.8
Total unrecognized compensation cost				89
Grant date fair value of stock options vested				92	103	114
Total expense/(income) related to deferred compensation				59	112	158
Deferred compensation liability which is being marked to market				1,093	1,149
Annum threshold rate				3.00%
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares of stock available for issuance				16,000,000
Restricted stock units (RSUs) granted to executives	1,364,440	1,459,256	2,144,501
Restricted stock units (RSUs) granted to executives, fair value per share	71.44	63.83	35.57
Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Initial value of Performance Awards				$ 100
Amount payable at end of three-year performance period, minimum				$ 0
Amount payable at end of three-year performance period, maximum				$ 200
Performance Awards granted to executives, minimum payout				0	0	0
Performance Award vesting period (years)				3
ShareValue Trust [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Undistributed shares returned by share value trust				29,948,920
2011 Performance Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Awards granted to executives, maximum payout				265
2010 Performance Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Awards granted to executives, maximum payout				246
2009 Performance Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Awards granted to executives, maximum payout				$ 285