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Note 3. Earnings Per Common Share ("EPS") Earnings Per Common Share ("EPS") (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Quarter ended |  | Year to date
|  | 2020 |  | 2019 |  | 2020 |  | 2019
Net Income |  | $ | 206 |  |  | $ | 289 |  |  | $ | 289 |  |  | $ | 551 |
Weighted-average common shares outstanding (for basic calculation) |  | 303 |  |  | 307 |  |  | 302 |  |  | 307 |
Effect of dilutive share-based employee compensation |  | 4 |  |  | 7 |  |  | 5 |  |  | 7 |
Weighted-average common and dilutive potential common shares outstanding (for diluted calculation) |  | 307 |  |  | 314 |  |  | 307 |  |  | 314 |
Basic EPS |  | $ | 0.68 |  |  | $ | 0.94 |  |  | $ | 0.96 |  |  | $ | 1.79 |
Diluted EPS |  | $ | 0.67 |  |  | $ | 0.92 |  |  | $ | 0.94 |  |  | $ | 1.75 |
Unexercised employee stock options and stock appreciation rights (in millions) excluded from the diluted EPS computation(a) |  | 5.2 |  |  | 2.3 |  |  | 4.7 |  |  | 1.8 |
(a) These unexercised employee stock options and stock appreciation rights were not included in the computation of diluted EPS because to do so would have been antidilutive for the periods presented.

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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://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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