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Earnings per Share Attributable to Ameriprise Financial, Inc. Common Shareholders (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Schedule of earnings per common share [Table Text Block] | The computations of basic and diluted earnings per share is as follows:
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
| (in millions, except per share amounts) |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |
Net income | $ | (539) |  |  | $ | 492 |  |  | $ | 1,497 |  |  | $ | 887 |
Denominator: |  |  |  |  |  |  |
Basic: Weighted-average common shares outstanding | 125.0 |  |  | 136.1 |  |  | 125.7 |  |  | 137.4 |
Effect of potentially dilutive nonqualified stock options and other share-based awards | 1.2 |  |  | 1.9 |  |  | 1.5 |  |  | 1.7 |
Diluted: Weighted-average common shares outstanding | 126.2 |  |  | 138.0 |  |  | 127.2 |  |  | 139.1 |
Earnings per share: |  |  |  |  |  |  |
Basic | $ | (4.31) |  |  | $ | 3.61 |  |  | $ | 11.91 |  |  | $ | 6.46 |
Diluted | $ | (4.31) |  | (1) | $ | 3.57 |  |  | $ | 11.77 |  |  | $ | 6.38 |
(1) Diluted shares used in this calculation represent basic shares due to the net loss. Using actual diluted shares would result in anti-dilution.

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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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