v3.26.1
MASTER TRUST - Schedule of Master Trust Net Assets (Details) - EBP 118 - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Total investments at fair value $ 1,432,867 $ 1,410,609
Total investments 1,680,641 1,700,348
Total receivables 84,502 88,297
Total liabilities 119 36
NET ASSETS AVAILABLE FOR BENEFITS $ 1,765,024 $ 1,788,609
Plan interest in the Master Trust as a percentage of total 26.00% 25.90%
Master Trust Balances    
EBP, Master Trust [Line Items]    
Total investments at fair value $ 5,561,750 $ 5,576,023
Stable Value fund at contract value 831,284 944,534
Total investments 6,393,034 6,520,557
Receivable for securities sold 33,750 60,779
Other receivables 11,618 15,143
Total receivables 45,368 75,922
Total Master Trust assets 6,438,402 6,596,479
Liability to return collateral held under securities lending agreements 17,710 28,801
Payable for securities purchased 62,982 100,358
Other payables 12,158 18,114
Total liabilities 92,850 147,273
NET ASSETS AVAILABLE FOR BENEFITS 6,345,552 6,449,206
Master Trust Balances | Common stock of International Paper Company    
EBP, Master Trust [Line Items]    
Total investments at fair value 187,581 274,839
Master Trust Balances | Equities    
EBP, Master Trust [Line Items]    
Total investments at fair value 4,063,771 4,140,648
Master Trust Balances | Fixed income    
EBP, Master Trust [Line Items]    
Total investments at fair value 1,210,182 1,017,411
Master Trust Balances | Derivatives    
EBP, Master Trust [Line Items]    
Total investments at fair value 1,108 1,966
Master Trust Balances | Cash and cash equivalents    
EBP, Master Trust [Line Items]    
Total investments at fair value 35,445 66,667
Master Trust Balances | Collateral held under securities lending    
EBP, Master Trust [Line Items]    
Total investments at fair value 17,710 28,801
Master Trust Balances | Real Estate Funds    
EBP, Master Trust [Line Items]    
Total investments at fair value 45,953 45,691
Plan's Interest in Master Trust Balances    
EBP, Master Trust [Line Items]    
Total investments at fair value 1,402,270 1,378,722
Stable Value fund at contract value 258,238 302,323
Total investments 1,660,508 1,681,045
Receivable for securities sold 8,775 15,377
Other receivables 3,171 6,381
Total receivables 11,946 21,758
Total Master Trust assets 1,672,454 1,702,803
Liability to return collateral held under securities lending agreements 4,605 7,459
Payable for securities purchased 16,375 25,390
Other payables 1,430 1,493
Total liabilities 22,410 34,342
NET ASSETS AVAILABLE FOR BENEFITS 1,650,044 1,668,461
Plan's Interest in Master Trust Balances | Common stock of International Paper Company    
EBP, Master Trust [Line Items]    
Total investments at fair value 35,442 52,025
Plan's Interest in Master Trust Balances | Equities    
EBP, Master Trust [Line Items]    
Total investments at fair value 1,014,235 1,020,038
Plan's Interest in Master Trust Balances | Fixed income    
EBP, Master Trust [Line Items]    
Total investments at fair value 325,036 266,676
Plan's Interest in Master Trust Balances | Derivatives    
EBP, Master Trust [Line Items]    
Total investments at fair value 209 376
Plan's Interest in Master Trust Balances | Cash and cash equivalents    
EBP, Master Trust [Line Items]    
Total investments at fair value 8,507 17,095
Plan's Interest in Master Trust Balances | Collateral held under securities lending    
EBP, Master Trust [Line Items]    
Total investments at fair value 4,605 7,459
Plan's Interest in Master Trust Balances | Real Estate Funds    
EBP, Master Trust [Line Items]    
Total investments at fair value $ 14,236 $ 15,053