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Net Income (Loss) Per Common Share (Tables)
3 Months Ended
Mar. 31, 2025
Earnings Per Share [Abstract]  
Calculations For Basic And Diluted Earnings Per Share The table shows calculations for basic and diluted earnings per share:
(In millions, except per share data)Three months ended March 31,
20252024
Numerator:  
Net income (loss)—basic and diluted
$(90)$755 
Denominator:  
Basic weighted-average common shares
  outstanding
156.4 156.8 
Effect of share-based awards:  
Stock options 0.7 
Nonvested shares 0.4 
Diluted weighted-average shares 156.4 157.9 
Earnings (loss) per share:  
Basic$(0.57)$4.82 
Diluted$(0.57)$4.78 
Number of anti-dilutive share-based awards1.7 1.3