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Earnings per Share Attributable to Ameriprise Financial, Inc. Common Shareholders (Tables) | 9 Months Ended
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Sep. 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 September 30, |  | Nine Months Ended September 30,
2020 |  | 2019 |  | 2020 |  | 2019
(in millions, except per share amounts)
Numerator: |  |  |  |  |  |  |
Net income | $ | (140) |  |  | $ | 543 |  |  | $ | 1,357 |  |  | $ | 1,430 |
Denominator: |  |  |  |  |  |  |
Basic: Weighted-average common shares outstanding | 123.0 |  |  | 132.7 |  |  | 124.8 |  |  | 135.8 |
Effect of potentially dilutive nonqualified stock options and other share-based awards | 1.9 |  |  | 1.8 |  |  | 1.7 |  |  | 1.7 |
Diluted: Weighted-average common shares outstanding | 124.9 |  |  | 134.5 |  |  | 126.5 |  |  | 137.5 |
Earnings per share: |  |  |  |  |  |  |
Basic | $ | (1.14) |  |  | $ | 4.09 |  |  | $ | 10.87 |  |  | $ | 10.53 |
Diluted | $ | (1.14) |  | (1) | $ | 4.04 |  |  | $ | 10.73 |  |  | $ | 10.40 |
(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://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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