Earnings (Loss) Per Common Share
Basic earnings (loss) per common share (“Basic EPS”) is computed by dividing net income by the weighted-average number of common shares outstanding for the period.
Diluted earnings (loss) per common share (“Diluted EPS”) takes into account the potential dilution that could occur if outstanding securities were exercised or settled in shares. Dilutive securities that may impact Diluted EPS include shares underlying outstanding stock options, RSUs and PRSUs granted to employees and non-employee directors (see Note 15), as well as common shares underlying the Convertible Notes (see Note 7). Dilutive securities related to shares underlying outstanding stock options, RSUs and PRSUs granted to employees and non-employee directors are included in the calculation of diluted earnings per common share using the treasury stock method. Dilutive securities related to common shares underlying the Convertible Notes are included in the calculation of Diluted EPS using the if-converted method. Basic and diluted weighted-average common shares outstanding are the same in periods when a net loss is reported or in periods when anti-dilution occurs.
The following table summarizes the computation of Basic and Diluted EPS (in millions, except per share data):
Year Ended December 31,
 202520242023
Earnings (loss) per common share—basic
Numerator:
Net income (loss) from continuing operations$38.8 $93.4 $99.5 
Income (loss) from discontinued operations, net of tax(448.1)(1,541.1)(4.5)
Net income (loss)$(409.3)$(1,447.7)$95.0 
Denominator:
Weighted-average common shares outstanding183.7 183.7 185.0 
Basic earnings (loss) per common share:
Continuing operations$0.21 $0.51 $0.54 
Discontinued operations$(2.44)$(8.39)$(0.02)
Net earnings (loss) per common share$(2.23)$(7.88)$0.51 
Earnings (loss) per common share—diluted
Numerator:
Net income (loss) from continuing operations$38.8 $93.4 $99.5 
Add: Interest expense attributable to convertible notes, net of tax— 6.5 6.5 
Income (loss) from continuing operations and assumed conversions38.8 99.9 106.0 
Loss from discontinued operations, net of tax(448.1)(1,541.1)(4.5)
Net (loss) income attributable to earnings per common share$(409.3)$(1,441.2)$101.5 
Denominator:
Weighted-average common shares outstanding—basic183.7 183.7 185.0 
Incremental shares for assumed conversion of Convertible Notes— 14.7 14.7 
Outstanding options, restricted stock units and performance share units2.0 0.9 1.4 
Weighted-average common shares outstanding—diluted185.7 199.3 201.1 
Diluted earnings (loss) per common share:
Continuing operations$0.21 $0.50 $0.53 
Discontinued operations$(2.41)$(7.73)$(0.02)
Net diluted earnings (loss) per common share$(2.20)$(7.23)$0.50 
Anti-Dilutive Options and Restricted Stock Units
For the year ended December 31, 2025, approximately 16.7 million securities outstanding comprised of shares subject to conversion from the Convertible Notes, stock options, restricted stock units and performance share units, were excluded from the calculation of Diluted EPS, as they would be anti-dilutive. For the years ended December 31, 2024 and 2023, approximately 2.5 million and 2.3 million securities outstanding, respectively, comprised of stock options, restricted stock units and performance share units, were excluded from the calculation of Diluted EPS, as they would be anti-dilutive.

About Earnings Per Share Disclosures

The earnings per share disclosure breaks down the calculation from net income to both basic and diluted EPS, revealing the full impact of a company's capital structure on per-share economics. The reconciliation between basic and diluted share counts exposes how many stock options, RSUs, convertible securities, and warrants are potentially dilutive to existing shareholders.

Key signals: a widening gap between basic and diluted shares indicates growing dilution from equity compensation or convertible instruments. Anti-dilutive securities excluded from the diluted calculation deserve attention — they represent latent dilution that will materialize if the stock price rises. Watch for the effect of share buybacks on per-share metrics: EPS growth driven primarily by repurchases rather than income growth signals weakening fundamentals. Compare year-over-year changes in the diluted share count against equity compensation expense to assess whether management is effectively managing dilution.