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Earnings Per Share (EPS)
 3 Months Ended
Mar. 31, 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
 
 
March 31,
 
 
2019
 
2018
 
 
(in millions, except per share data)
Numerator
 
 

 
 
Net income attributable to AAM
 
$
41.6

 
$
89.4

    Less: Net income attributable to participating securities
 
(1.2
)
 
(2.2
)
Net income attributable to common shareholders - Basic and Dilutive
 
$
40.4

 
$
87.2

 
 
 
 
 
Denominators
 
 

 
 

Basic common shares outstanding -
 
 

 
 

   Weighted-average shares outstanding
 
115.3

 
114.2

        Less: Participating securities
 
(3.4
)
 
(2.8
)
    Weighted-average common shares outstanding
 
111.9

 
111.4

 
 
 
 
 
Effect of dilutive securities -
 
 

 
 

   Dilutive stock-based compensation
 
0.5

 
0.5

 
 


 


Diluted shares outstanding -
 
 

 
 

   Adjusted weighted-average shares after assumed conversions
 
112.4

 
111.9

 
 
 

 
 

Basic EPS
 
$
0.36

 
$
0.78

 
 
 

 
 

Diluted EPS
 
$
0.36

 
$
0.78