v3.26.1
CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Millions
Total
Parent
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Loss
Retained Earnings
Noncontrolling Interest
Balance at beginning of period at Dec. 31, 2024     $ 115.7 $ 0.0 $ (450.1) $ 2,357.5 $ 32.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Common stock repurchased and retired $ (30.3)   (1.2) (11.5)   (17.6)  
Stock Issued During Period, Value, Stock Options Exercised 1.9   0.0 1.9      
Common stock issued for other transactions     0.1 4.4      
Stock-based compensation       5.2      
Other comprehensive income (loss), net of tax (1.3)       (1.3)    
Common stock dividends paid           (46.0)  
Net (loss) income attributable to Olin Corporation 0.1         0.1  
Net loss attributable to noncontrolling interests (1.7)           (1.7)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders             0.0
Distributions to noncontrolling interests 0.0            
Balance at end of period at Jun. 30, 2025 $ 1,987.8 $ 1,957.2 114.6 0.0 (451.4) 2,294.0 30.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividends declared per share of common stock $ 0.40            
Balance at beginning of period at Mar. 31, 2025     115.1 0.0 (430.6) 2,321.5 32.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Common stock repurchased and retired     (0.5) (6.4)   (3.2)  
Stock Issued During Period, Value, Stock Options Exercised     0.0 0.0      
Common stock issued for other transactions     0.0 0.5      
Stock-based compensation       5.9      
Other comprehensive income (loss), net of tax $ (20.8)       (20.8)    
Common stock dividends paid           (23.0)  
Net (loss) income attributable to Olin Corporation (1.3)         (1.3)  
Net loss attributable to noncontrolling interests (1.5)           (1.5)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders             0.0
Balance at end of period at Jun. 30, 2025 $ 1,987.8 1,957.2 114.6 0.0 (451.4) 2,294.0 30.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividends declared per share of common stock $ 0.20            
Balance at beginning of period at Dec. 31, 2025 $ 1,870.6   113.6 0.0 (414.5) 2,139.8 31.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Common stock repurchased and retired     0.0 0.0   0.0  
Stock Issued During Period, Value, Stock Options Exercised 3.0   0.2 2.8      
Common stock issued for other transactions     0.2 6.8      
Stock-based compensation       2.3      
Other comprehensive income (loss), net of tax 2.1       2.1    
Common stock dividends paid           (45.6)  
Net (loss) income attributable to Olin Corporation (96.3)         (96.3)  
Net loss attributable to noncontrolling interests 0.0           0.0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders             (31.3)
Distributions to noncontrolling interests (31.3)            
Balance at end of period at Jun. 30, 2026 $ 1,711.8 1,711.4 114.0 11.9 (412.4) 1,997.9 0.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividends declared per share of common stock $ 0.40            
Balance at beginning of period at Mar. 31, 2026     113.9 4.8 (418.4) 2,034.0 0.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Common stock repurchased and retired     0.0 0.0   0.0  
Stock Issued During Period, Value, Stock Options Exercised     0.0 0.9      
Common stock issued for other transactions     0.1 0.8      
Stock-based compensation       5.4      
Other comprehensive income (loss), net of tax $ 6.0       6.0    
Common stock dividends paid           (22.8)  
Net (loss) income attributable to Olin Corporation (13.3)         (13.3)  
Net loss attributable to noncontrolling interests 0.0           0.0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders             0.0
Balance at end of period at Jun. 30, 2026 $ 1,711.8 $ 1,711.4 $ 114.0 $ 11.9 $ (412.4) $ 1,997.9 $ 0.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Dividends declared per share of common stock $ 0.20