v3.26.1
MASTER TRUST - Schedule of Master Trust Net Assets (Details) - EBP 007 - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
EBP, Master Trust [Line Items]    
Total investments at fair value $ 4,316,111 $ 4,342,550
Total investments 4,852,139 4,925,994
Total receivables 70,217 67,865
Total liabilities 351 389
NET ASSETS AVAILABLE FOR BENEFITS $ 4,922,005 $ 4,993,470
Plan interest in the Master Trust as a percentage of total 74.00% 74.10%
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 4,159,480 4,197,301
Stable Value fund at contract value 573,046 642,211
Total investments 4,732,526 4,839,512
Receivable for securities sold 24,975 45,402
Other receivables 8,447 8,762
Total receivables 33,422 54,164
Total Master Trust assets 4,765,948 4,893,676
Liability to return collateral held under securities lending agreements 13,105 21,342
Payable for securities purchased 46,607 74,968
Other payables 10,728 16,621
Total liabilities 70,440 112,931
NET ASSETS AVAILABLE FOR BENEFITS 4,695,508 4,780,745
Plan's Interest in Master Trust Balances | Common stock of International Paper Company    
EBP, Master Trust [Line Items]    
Total investments at fair value 152,139 222,814
Plan's Interest in Master Trust Balances | Equities    
EBP, Master Trust [Line Items]    
Total investments at fair value 3,049,536 3,120,610
Plan's Interest in Master Trust Balances | Fixed income    
EBP, Master Trust [Line Items]    
Total investments at fair value 885,146 750,735
Plan's Interest in Master Trust Balances | Derivatives    
EBP, Master Trust [Line Items]    
Total investments at fair value 899 1,590
Plan's Interest in Master Trust Balances | Cash and cash equivalents    
EBP, Master Trust [Line Items]    
Total investments at fair value 26,938 49,572
Plan's Interest in Master Trust Balances | Collateral held under securities lending    
EBP, Master Trust [Line Items]    
Total investments at fair value 13,105 21,342
Plan's Interest in Master Trust Balances | Real Estate Funds    
EBP, Master Trust [Line Items]    
Total investments at fair value $ 31,717 $ 30,638