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Earnings per Share Attributable to Ameriprise Financial, Inc. Common Shareholders | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Earnings per Share [Text Block] | Earnings per Share The computations of basic and diluted earnings per share is as follows:
| Years Ended December 31,
2020 |  | 2019 |  | 2018
(in millions, except per share amounts)
Numerator: |  |  |  |  |
Net income | $ | 1,534 |  |  | $ | 1,893 |  |  | $ | 2,098 |
Denominator: |  |  |  |  |
Basic: Weighted-average common shares outstanding | 123.8 |  |  | 134.1 |  |  | 145.6 |
Effect of potentially dilutive nonqualified stock options and other share-based awards | 1.9 |  |  | 1.9 |  |  | 2.1 |
Diluted: Weighted-average common shares outstanding | 125.7 |  |  | 136.0 |  |  | 147.7 |
Earnings per share attributable to Ameriprise Financial, Inc. common shareholders: |  |  |  |  |
Basic | $ | 12.39 |  |  | $ | 14.12 |  |  | $ | 14.41 |
Diluted | $ | 12.20 |  |  | $ | 13.92 |  |  | $ | 14.20 |
The calculation of diluted earnings per share excludes the incremental effect of nil, $1.0 million and $3.2 million options as of December 31, 2020, 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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