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Earnings Per Share (EPS) (Basic And Diluted Earnings Per Share Computation) (Details) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]    
Net income from continuing operations$ 265$ 547$ 1,047$ 1,267
Discontinued Operations29209615
NET INCOME$ 294$ 567$ 1,143$ 1,282
Weighted Average Common Shares Outstanding505,909505,945505,959506,001
Total Shares, Basic505,909505,945505,959506,001
Total Shares, Diluted506,999506,968506,963507,068
INCOME FROM CONTINUING OPERATIONS, BASIC$ 0.52$ 1.08$ 2.07$ 2.50
Earnings Per Share, Discontinued Operations, Basic$ 0.06$ 0.04$ 0.19$ 0.03
INCOME FROM CONTINUING OPERATIONS, DILUTED$ 0.52$ 1.08$ 2.06$ 2.50
Earnings Per Share, Discontinued Operations, Diluted$ 0.06$ 0.04$ 0.19$ 0.03
Earnings Per Share, Basic, Total$ 0.58$ 1.12$ 2.26$ 2.53
Earnings Per Share, Diluted, Total$ 0.58$ 1.12$ 2.25$ 2.53
Stock Options [Member]
    
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]    
Incremental common shares attributable to share based payment arrangements, Basic0000
Incremental common shares attributable to share based payment arrangements, diluted193165172148
Performance Share [Member]
    
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]    
Incremental common shares attributable to share based payment arrangements, Basic0000
Incremental common shares attributable to share based payment arrangements, diluted599662607785
Restricted Stock Units [Member]
    
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]    
Incremental common shares attributable to share based payment arrangements, Basic0000
Incremental common shares attributable to share based payment arrangements, diluted298196225134