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Earnings Per Common Share (EPS) | 12 Months Ended
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Dec. 31, 2012
Earnings Per Share [Abstract] |
Earnings Per Common Share (EPS) | NOTE 18 Earnings Per Common S hare (EPS) The computations of basic and diluted EPS for the years ended December 31 were as follows:
(Millions, except per share amounts) |  | 2012 |  |  | 2011 |  |  | 2010
Numerator: |  |  |  |  |  |  |  |  |
| Basic and diluted: |  |  |  |  |  |  |  |  |
|  | Income from continuing operations |  | $ | 4,482 |  | $ | 4,899 |  | $ | 4,057
|  | Earnings allocated to participating |  |  |  |  |  |  |  |  |
|  |  | share awards(a) |  |  | (49) |  |  | (58) |  |  | (51)
|  | Income from discontinued |  |  |  |  |  |  |  |  |
|  |  | operations, net of tax |  |  | ― |  |  | 36 |  |  | ―
|  | Net income attributable to common |  |  |  |  |  |  |  |  |
|  |  | shareholders |  | $ | 4,433 |  | $ | 4,877 |  | $ | 4,006
Denominator:(a) |  |  |  |  |  |  |  |  |
| Basic: Weighted-average common stock |  |  | 1,135 |  |  | 1,178 |  |  | 1,188
| Add: Weighted-average stock options(b) |  |  | 6 |  |  | 6 |  |  | 7
| Diluted |  |  | 1,141 |  |  | 1,184 |  |  | 1,195
Basic EPS: |  |  |  |  |  |  |  |  |
| Income from continuing operations |  |  |  |  |  |  |  |  |
|  | attributable to common shareholders |  | $ | 3.91 |  | $ | 4.11 |  | $ | 3.37
| Income from discontinued operations |  |  | ― |  |  | 0.03 |  |  | ―
| Net income attributable to common |  |  |  |  |  |  |  |  |
|  | shareholders |  | $ | 3.91 |  | $ | 4.14 |  | $ | 3.37
Diluted EPS: |  |  |  |  |  |  |  |  |
| Income from continuing operations |  |  |  |  |  |  |  |  |
|  | attributable to common shareholders |  | $ | 3.89 |  | $ | 4.09 |  | $ | 3.35
| Income from discontinued operations |  |  | ― |  |  | 0.03 |  |  | ―
| Net income attributable to common |  |  |  |  |  |  |  |  |
|  | shareholders |  | $ | 3.89 |  | $ | 4.12 |  | $ | 3.35
The Company's unvested restricted stock awards, which include the right to receive non-forfeitable divi dends or dividend equivalents, are considered participating securities. Calculations of EPS under the two-class method exclude from the numerator any dividends paid or owed on participating securities and any undistributed earnings considered to be attributable to participating securities. The related participating securities are similarly excluded from the denominator. For the years ended December 31, 2012, 2011 and 2010, the dilutive effect of unexercised stock options excludes 8 million, 19 million and 36 million options, respectively, from the computation of EPS because inclusion of the options would have been anti-dilutive. For the years ended December 31, 2012, 2011 and 2010, the Company met specified performance measures related to the Subordinated D ebentures of $750 million issued in 2006, which resulted in no impact to EPS. If the performance measures were not achieved in any given quarter, the Company would be required to issue common shares and apply the proceeds to make interest payments.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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