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Net Income (Loss) Per Common Share (Tables)
9 Months Ended
Sep. 30, 2024
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 September 30,Nine months ended September 30,
2024202320242023
Numerator:    
Net income (loss)—basic and diluted
$820 $(99)$1,887 $660 
Denominator:    
Basic weighted-average common shares
  outstanding
156.2 156.9 156.5 157.0 
Effect of share-based awards:    
Stock options0.9 — 0.7 0.7 
Nonvested shares0.6 — 0.5 0.5 
Diluted weighted-average shares 157.7 156.9 157.7 158.2 
Earnings (loss) per share:    
Basic$5.25 $(0.63)$12.06 $4.20 
Diluted$5.20 $(0.63)$11.97 $4.17 
Number of anti-dilutive share-based awards0.6 2.4 1.3 1.3