v3.26.1
Party-in-Interest Transactions (Details) - EBP 032 - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value $ 1,489,888,745  
Empower/Empower Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
Fees Paid to Related Parties and Parties-in-Interest 769,649 $ 4,127
Voya/Voya Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
Fees Paid to Related Parties and Parties-in-Interest 0 467,921
State Street    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
Fees Paid to Related Parties and Parties-in-Interest 60,000 74,383
Investment, Identifier [Axis]: Charles Schwab & Co., Inc.: Self-directed Brokerage Investment    
EBP, Related Party and Party-in-Interest Transactions [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, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 77,550,989  
Investment, Identifier [Axis]: Collective Trusts: JPMCB Core Plus Bond    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 36,604,152  
Investment, Identifier [Axis]: Collective Trusts: Northern Trust All Country World ex-US Investable Market Index    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 52,662,967  
Investment, Identifier [Axis]: Collective Trusts: Northern Trust Extended Equity Market Index    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 18,147,027  
Investment, Identifier [Axis]: Collective Trusts: Northern Trust S&P 500 Index    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 260,535,622  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2010 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 27,992,855  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2015 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 11,701,209  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2020 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 39,250,402  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2025 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 75,379,335  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2030 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 119,740,898  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2035 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 124,477,146  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2040 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 101,965,561  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2045 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 89,304,800  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2050 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 79,617,215  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2055 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 96,859,899  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2060 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 4,462,146  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2065 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 864,541  
Investment, Identifier [Axis]: Collective Trusts: T. Rowe Price Retirement 2070 Trust    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 565,192  
Investment, Identifier [Axis]: Mutual Funds: Artisan International Value Fund    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 38,111,739  
Investment, Identifier [Axis]: Mutual Funds: Baird Aggregate Bond Fund    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 47,531,821  
Investment, Identifier [Axis]: Mutual Funds: Capital Group American New Perspective Fund    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 28,113,455  
Investment, Identifier [Axis]: Mutual Funds: Eaton Vance Atlanta Capital Small/Mid Cap Fund    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 42,485,848  
Investment, Identifier [Axis]: Mutual Funds: PIMCO All Asset Fund    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 9,641,669  
Investment, Identifier [Axis]: Olin Common Stock Fund and Self-directed Brokerage Investment: Olin Corporation Common Stock    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 27,282,469 43,277,459
Olin Common Stock Purchases, Amount 11,969,062 6,095,969
Olin Common Stock Sales, Amount 11,498,787 16,327,430
Investment, Identifier [Axis]: Olin Common Stock Fund: Olin Corporation Common Stock    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 26,901,921 42,871,537
Olin Common Stock Purchases, Amount 5,736,914 5,474,212
Olin Common Stock Sales, Amount 5,348,064 15,756,568
Investment, Identifier [Axis]: Olin Common Stock Fund: Olin Corporation common stock    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 26,901,921  
Investment, Identifier [Axis]: Self-directed Brokerage Investment: Olin Corporation Common Stock    
EBP, Related Party and Party-in-Interest Transactions [Line Items]    
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value 380,548 405,922
Olin Common Stock Purchases, Amount 6,232,148 621,757
Olin Common Stock Sales, Amount $ 6,150,723 $ 570,862