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Earnings (Loss) Per Share (Notes)
 3 Months Ended
Mar. 31, 2024
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
13. EARNINGS (LOSS) 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 Ended
 March 31,
 20242023
 (in millions, except per share data)
Numerator
Net income (loss)$20.5 $(5.1)
    Less: Net income attributable to participating securities(0.6)— 
Net income (loss) attributable to common shareholders - Basic and Dilutive$19.9 $(5.1)
Denominators
Basic common shares outstanding -
   Weighted-average shares outstanding120.9 119.8 
        Less: Weighted-average participating securities(3.7)(4.6)
    Weighted-average common shares outstanding117.2 115.2 
Effect of dilutive securities -
   Dilutive stock-based compensation0.1 — 
 
Diluted shares outstanding -
   Adjusted weighted-average shares after assumed conversions117.3 115.2 
 
Basic EPS$0.17 $(0.04)
 
Diluted EPS$0.17 $(0.04)

Basic and dilutive loss per share are the same for the three months ended March 31, 2023 because the effect of potentially dilutive stock-based compensation would have been antidilutive. Excluded potentially dilutive shares were 0.2 million for the three months ended March 31, 2023.