v3.25.3
EARNINGS PER SHARE (Tables)
 9 Months Ended
Sep. 30, 2025
Earnings Per Share [Abstract]  
Basic and Diluted Earnings Per Share Table
 Three Months Ended September 30,Nine Months Ended September 30,
 2025202420252024
Computation of Earnings per Share(In millions, except per share data)
Net income (loss) attributable to Olin Corporation$42.8 $(24.9)$42.9 $97.9 
Weighted-average common shares - basic114.4 116.9 114.9 118.4 
Dilutive effect of stock-based compensation0.7 — 0.7 1.8 
Weighted-average common shares - diluted115.1 116.9 115.6 120.2 
Earnings (loss) per common share attributable to Olin Corporation:
Basic$0.37 $(0.21)$0.37 $0.83 
Diluted$0.37 $(0.21)$0.37 $0.81