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Earnings per Share Attributable to Ameriprise Financial, Inc. Common Shareholders
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Earnings per share attributable to Ameriprise Financial, Inc. common shareholders [Text Block]
Earnings per Share
The computation of basic and diluted earnings per share is as follows:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
2018
 
2017
 
2018
 
2017
(in millions, except per share amounts)
Numerator:
 
 
 
 
 
 
 
Net income
$
462

 
$
393

 
$
1,056

 
$
796

 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Basic: Weighted-average common shares outstanding
147.0

 
155.1

 
148.2

 
156.3

Effect of potentially dilutive nonqualified stock options and other share-based awards
2.0

 
2.4

 
2.3

 
2.5

Diluted: Weighted-average common shares outstanding
149.0

 
157.5

 
150.5

 
158.8

 
 
 
 
 
 
 
 
Earnings per share:
 
 
 
 
 
 
 
Basic
$
3.14

 
$
2.53

 
$
7.13

 
$
5.09

Diluted
$
3.10

 
$
2.50

 
$
7.02

 
$
5.01


The calculation of diluted earnings per share excludes the incremental effect of 1.1 million and 2.6 million options as of June 30, 2018 and June 30, 2017, respectively, due to their anti-dilutive effect.