Earnings Per Share From Continuing Operations (Details) (USD $) Share data in Millions, except Per Share data	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Share Repurchases (Table Amounts)
Shares repurchased	19.7	23.1	21.4
Diluted Earnings Per Share (Amounts in Paragraphs)
Dilutive effect of stock options and other stock awards granted	4.2	4.1
Anti-dilutive effect of stock options, other stock awards granted, and mandatorily redeemable preferred stock			7.1
Antidilutive stock options	2.8	8.1	2.1
December 19, 2007 Program - Total Authorization
Share Repurchases (Table Amounts)
Amount authorized	$ 3,600,000,000
Average price per share	$ 59.82
Total shares retired	60.2
Shares repurchased	15.7	23.1	21.4
June 16, 2010 Program - Original Authorization
Share Repurchases (Table Amounts)
Amount authorized	2,000,000,000
Average price per share	$ 59.95
Total shares retired	4.0
Shares repurchased	4.0
Share Repurchases (Amounts in Paragraphs)
Amount remaining under authorization for share repurchases	$ 1,800,000,000

Amount authorized by the company's board of directors for share repurchases.

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Securities (including those issuable pursuant to contingent stock agreements and redeemable preferred stock) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.

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Amount remaining under the authorization. Calculated as total amount authorized less amount spent on share repurchases to date.

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Average price paid per share under this authorization.

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Share repurchases numeric abstract.

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Share repurchases table abstract.

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Total shares retired under this authorization.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c

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Aggregate awards of share options and nonvested shares to be issued to an employee under a share-based compensation arrangement are considered options for purposes of computing diluted earnings per share. Such share-based awards shall be considered to be outstanding as of the grant date for purposes of computing diluted earnings per share even though their exercise may be contingent upon vesting. Those share-based awards are included in the diluted Earnings Per Share (EPS) computation even if the employee may not receive (or be able to sell) the stock until some future date. Accordingly, all shares to be issued shall be included in computing diluted EPS if the effect is dilutive. The dilutive effect of share-based compensation arrangements shall be computed using the treasury stock method. If the equity share options or other equity instruments are outstanding for only part of a period, the shares issuable shall be weighted to reflect the portion of the period during which the equity instruments were outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 20

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Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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