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Earnings (Loss) Per Share (Notes)
 6 Months Ended
Jun. 30, 2023
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
11. EARNINGS PER SHARE (EPS)

We present EPS 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 are our 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 EndedSix Months Ended
 June 30,June 30,
 2023202220232022
 (in millions, except per share data)
Numerator  
Net income$8.0 $22.9 $2.9 $23.9 
    Less: Net income attributable to participating securities(0.1)(1.0)(0.1)(1.0)
Net income attributable to common shareholders - Basic and Dilutive$7.9 $21.9 $2.8 $22.9 
Denominators  
Basic common shares outstanding -  
   Weighted-average shares outstanding120.4 119.5 120.1 119.2 
        Less: Weighted-average participating securities(3.4)(5.0)(4.0)(4.8)
    Weighted-average common shares outstanding117.0 114.5 116.1 114.4 
Effect of dilutive securities -  
   Dilutive stock-based compensation0.2 0.8 0.2 0.6 
 
Diluted shares outstanding -  
   Adjusted weighted-average shares after assumed conversions117.2 115.3 116.3 115.0 
   
Basic EPS$0.07 $0.19 $0.02 $0.20 
   
Diluted EPS$0.07 $0.19 $0.02 $0.20