v3.26.1
Schedule H, Line 4i - Schedule of Assets (Held at End of Year) (Details) - EBP 032
12 Months Ended
Dec. 31, 2025
USD ($)
yr
Rate
shares
Dec. 31, 2024
USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]    
Plan Name Olin Corporation Retirement Savings Plan  
Entity Tax Identification Number 13-1872319  
EBP, Plan Number 032  
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 1,489,888,745  
EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution $ 18,837,344  
Loan Maturity Date | yr 2,042  
Maximum    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Participant Loan, Interest Rate | Rate 9.50%  
Minimum    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Participant Loan, Interest Rate | Rate 3.25%  
Investment, Identifier [Axis]: Charles Schwab & Co., Inc.: Self-directed Brokerage Investment    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 79,420,336  
Investment, Identifier [Axis]: Collective Trusts: Galliard Managed Income Fund D    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 77,550,989  
EBP, Investment, Number of Shares | shares 2,815,244  
Investment, Identifier [Axis]: Collective Trusts: JPMCB Core Plus Bond    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 36,604,152  
EBP, Investment, Number of Shares | shares 2,971,116  
Investment, Identifier [Axis]: Collective Trusts: Northern Trust All Country World ex-US Investable Market Index    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 52,662,967  
EBP, Investment, Number of Shares | shares 264,784  
Investment, Identifier [Axis]: Collective Trusts: Northern Trust Extended Equity Market Index    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 18,147,027  
EBP, Investment, Number of Shares | shares 81,898  
Investment, Identifier [Axis]: Collective Trusts: Northern Trust S&P 500 Index    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 260,535,622  
EBP, Investment, Number of Shares | shares 819,939  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2010 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 27,992,855  
EBP, Investment, Number of Shares | shares 1,122,408  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2015 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 11,701,209  
EBP, Investment, Number of Shares | shares 427,989  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2020 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 39,250,402  
EBP, Investment, Number of Shares | shares 1,314,921  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2025 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 75,379,335  
EBP, Investment, Number of Shares | shares 2,300,957  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2030 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 119,740,898  
EBP, Investment, Number of Shares | shares 3,309,588  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2035 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 124,477,146  
EBP, Investment, Number of Shares | shares 3,137,024  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2040 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 101,965,561  
EBP, Investment, Number of Shares | shares 2,394,682  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2045 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 89,304,800  
EBP, Investment, Number of Shares | shares 2,015,000  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2050 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 79,617,215  
EBP, Investment, Number of Shares | shares 1,783,540  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2055 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 96,859,899  
EBP, Investment, Number of Shares | shares 2,167,828  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2060 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 4,462,146  
EBP, Investment, Number of Shares | shares 155,584  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2065 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 864,541  
EBP, Investment, Number of Shares | shares 48,137  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2070 Trust    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 565,192  
EBP, Investment, Number of Shares | shares 51,569  
Investment, Identifier [Axis]: Mutual Funds: Artisan International Value Fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 38,111,739  
EBP, Investment, Number of Shares | shares 708,660  
Investment, Identifier [Axis]: Mutual Funds: Baird Aggregate Bond Fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 47,531,821  
EBP, Investment, Number of Shares | shares 4,781,873  
Investment, Identifier [Axis]: Mutual Funds: Capital Group American New Perspective Fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 28,113,455  
EBP, Investment, Number of Shares | shares 397,813  
Investment, Identifier [Axis]: Mutual Funds: Eaton Vance Atlanta Capital Small/Mid Cap Fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 42,485,848  
EBP, Investment, Number of Shares | shares 1,139,336  
Investment, Identifier [Axis]: Mutual Funds: PIMCO All Asset Fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 9,641,669  
EBP, Investment, Number of Shares | shares 844,279  
Investment, Identifier [Axis]: Olin Common Stock Fund and Self-directed Brokerage Investment: Olin Corporation Common Stock    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 27,282,469 $ 43,277,459
Investment, Identifier [Axis]: Olin Common Stock Fund: Olin Corporation Common Stock    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 26,901,921 42,871,537
Investment, Identifier [Axis]: Olin Common Stock Fund: Olin Corporation common stock    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 26,901,921  
EBP, Investment, Number of Shares | shares 1,291,304  
Investment, Identifier [Axis]: Self-directed Brokerage Investment: Olin Common Stock Fund    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Investment, Number of Shares | shares 18,269  
Investment, Identifier [Axis]: Self-directed Brokerage Investment: Olin Corporation Common Stock    
EBP, Schedule of Asset Held for Investment [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 380,548 $ 405,922