RELATED-PARTY TRANSACTIONS (Details) - EBP 118 - USD ($) shares in Millions, $ in Millions |
12 Months Ended | |
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Dec. 31, 2025 |
Dec. 31, 2024 |
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| EBP, Related Party and Party-in-Interest Transactions [Line Items] | ||
| Fees paid for trustee services | $ 1.4 | |
| Investment, number of shares (in shares) | 0.9 | 1.0 |
| Plan interest in master trust, cost basis | $ 37.5 | $ 39.9 |
| Investment, plan interest in master trust, fair value | 35.4 | $ 52.5 |
| Common stock of International Paper Company | ||
| EBP, Related Party and Party-in-Interest Transactions [Line Items] | ||
| Dividend income | $ 1.8 |
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- Definition EBP, Fees Paid For Trustee Services No definition available.
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- Definition EBP, Investment, Plan Interest In Master Trust, Cost No definition available.
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- Definition Amount of increase in net asset available for benefit from dividend income on investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Number of shares or units of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value of plan interest in master trust held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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