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Earnings per Share Attributable to Ameriprise Financial, Inc. Common Shareholders | 3 Months Ended
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Mar. 31, 2019
Earnings Per Share [Abstract] |
Earnings per share attributable to Ameriprise Financial, Inc. common shareholders [Text Block] | Earnings per Share The computations of basic and diluted earnings per share is as follows:
| Three Months Ended March 31,
2019 |  | 2018
(in millions, except per share amounts)
Numerator: |  |  |
Net income | $ | 395 |  |  | $ | 594 |
Denominator: |  |  |
Basic: Weighted-average common shares outstanding | 138.8 |  |  | 149.5 |
Effect of potentially dilutive nonqualified stock options and other share-based awards | 1.3 |  |  | 2.6 |
Diluted: Weighted-average common shares outstanding | 140.1 |  |  | 152.1 |
Earnings per share: |  |  |
Basic | $ | 2.85 |  |  | $ | 3.97 |
Diluted | $ | 2.82 |  |  | $ | 3.91 |
The calculation of diluted earnings per share excludes the incremental effect of 4.4 million and 1.1 million options as of March 31, 2019 and 2018, respectively, due to their anti-dilutive effect.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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