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Net Income/(Loss) Per Share (Tables)
9 Months Ended
Sep. 30, 2022
Earnings Per Share [Abstract]  
Reconciliation of the Common and Potential Common Shares Outstanding Used in Earnings Per Share Calculation
The following table is a reconciliation of the average number of common and potential common shares outstanding used in the calculations of basic and diluted net income/(loss) per share (in millions, shares in thousands):
Three Months EndedNine Months Ended
September 30,
2022
September 30,
2021
September 30,
2022
September 30,
2021
Numerator (basic and diluted):  
Net income/(loss)$(22.5)$12.2 $(9.1)$35.6 
Less: Dividends paid to participating securities(0.2)(0.2)(0.7)(0.5)
Undistributed and distributed earnings/(loss) available to common stockholders$(22.7)$12.0 $(9.8)$35.1 
Denominator:  
Average number of common shares outstanding52,593.9 31,046.1 38,415.9 31,022.1 
Effect of dilutive stock-based compensation— 354.9 — 359.5 
Average number of common and potential common shares outstanding52,593.9 31,401.0 38,415.9 31,381.6