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Basis of Presentation and Significant Accounting Policies and Practices (Tables) | 12 Months Ended
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Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Earnings per Share, Basic and Diluted | Computation and reconciliation of earnings per common share are as follows (shares in millions):
| For Years Ended December 31, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| 2019 |  |  |  |  |  | 2018 |  |  |  |  |  | 2017 |  |  |  |
| Net Income |  | Shares |  | EPS |  | Net Income |  | Shares |  | EPS |  | Net Income |  | Shares |  | EPS
Basic EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 5,017 |  |  |  |  |  |  | $ | 5,580 |  |  |  |  |  |  | $ | 3,682 |  |  |  |  |
Income allocated to RSUs | (32) |  |  |  |  |  |  | (43) |  |  |  |  |  |  | (34) |  |  |  |  |
Income allocated to common stock | $ | 4,985 |  |  | 936 |  |  | $ | 5.33 |  |  | $ | 5,537 |  |  | 970 |  |  | $ | 5.71 |  |  | $ | 3,648 |  |  | 991 |  |  | $ | 3.68 |
Dilutive effect of stock compensation plans |  |  | 16 |  |  |  |  |  |  | 20 |  |  |  |  |  |  | 21 |  |  |
Diluted EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 5,017 |  |  |  |  |  |  | $ | 5,580 |  |  |  |  |  |  | $ | 3,682 |  |  |  |  |
Income allocated to RSUs | (31) |  |  |  |  |  |  | (42) |  |  |  |  |  |  | (33) |  |  |  |  |
Income allocated to common stock | $ | 4,986 |  |  | 952 |  |  | $ | 5.24 |  |  | $ | 5,538 |  |  | 990 |  |  | $ | 5.59 |  |  | $ | 3,649 |  |  | 1,012 |  |  | $ | 3.61 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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