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Earnings Per Share (EPS)
 6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
12. EARNINGS PER SHARE (EPS)

We present earnings per share using the two-class method. This method allocates undistributed earnings between common shares and non-vested share based payment awards that entitle the holder to non-forfeitable dividend rights. Our participating securities include non-vested restricted stock units.

The following table sets forth the computation of our basic and diluted EPS available to shareholders of common stock (excluding participating securities):

 
 
Three Months Ended
 
Six Months Ended
 
 
June 30,
 
June 30,
 
 
2019
 
2018
 
2019
 
2018
 
 
(in millions, except per share data)
Numerator
 
 

 
 
 
 
 
 
Net income attributable to AAM
 
$
52.5

 
$
151.1

 
$
94.1

 
$
240.5

    Less: Net income attributable to participating securities
 
(1.5
)
 
(4.9
)
 
(2.7
)
 
(6.8
)
Net income attributable to common shareholders - Basic and Dilutive
 
$
51.0

 
$
146.2

 
$
91.4

 
$
233.7

 
 
 
 
 
 
 
 
 
Denominators
 
 

 
 

 
 
 
 
Basic common shares outstanding -
 
 

 
 

 
 
 
 
   Weighted-average shares outstanding
 
115.8

 
115.4

 
115.6

 
114.8

        Less: Participating securities
 
(3.3
)
 
(3.7
)
 
(3.4
)
 
(3.3
)
    Weighted-average common shares outstanding
 
112.5

 
111.7

 
112.2

 
111.5

 
 
 
 
 
 
 
 
 
Effect of dilutive securities -
 
 

 
 

 
 
 
 
   Dilutive stock-based compensation
 
0.3

 
0.6

 
0.4

 
0.6

 
 


 


 
 
 
 
Diluted shares outstanding -
 
 

 
 

 
 
 
 
   Adjusted weighted-average shares after assumed conversions
 
112.8

 
112.3

 
112.6

 
112.1

 
 
 

 
 

 
 
 
 
Basic EPS
 
$
0.45

 
$
1.31

 
$
0.81

 
$
2.09

 
 
 

 
 

 
 
 
 
Diluted EPS
 
$
0.45

 
$
1.30

 
$
0.81

 
$
2.08