v3.26.1
Investment in Master Trust - Summarized Financial Information (Details) - EBP 003 - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
ASSETS    
Total Assets $ 1,634,465 $ 1,540,902
LIABILITIES    
Total Liabilities 271 486
Net Assets Available for Benefits $ 1,634,194 $ 1,540,416
Plan’s Percentage of Investment in the Master Trust’s Net Assets 50.00% 51.00%
EBP, Nonconsolidated, Master Trust    
ASSETS    
Accrued income $ 319 $ 296
Due from brokers for securities sold 0 31
Investments, at fair value: 2,922,588 2,673,931
Stable value fund, at contract value: 309,923 331,455
Total Assets 3,232,830 3,005,713
LIABILITIES    
Due to brokers for securities purchased 0 26
Total Liabilities 0 26
Net Assets Available for Benefits 3,232,830 3,005,687
EBP, Nonconsolidated, Master Trust | CSX Common Stock    
ASSETS    
Investments, at fair value: 884,518 852,648
EBP, Nonconsolidated, Master Trust | Mutual funds    
ASSETS    
Investments, at fair value: 281,508 252,656
EBP, Nonconsolidated, Master Trust | Common Collective Trusts    
ASSETS    
Investments, at fair value: 1,355,365 1,191,312
EBP, Nonconsolidated, Master Trust | Other Common Stock    
ASSETS    
Investments, at fair value: 401,197 377,315
EBP, Nonconsolidated, Plan Interest in Master Trust    
ASSETS    
Accrued income 197 183
Due from brokers for securities sold 0 19
Investments, at fair value: 1,413,141 1,306,319
Stable value fund, at contract value: 198,350 212,132
Total Assets 1,611,688 1,518,653
LIABILITIES    
Due to brokers for securities purchased 0 18
Total Liabilities 0 18
Net Assets Available for Benefits 1,611,688 1,518,635
EBP, Nonconsolidated, Plan Interest in Master Trust | CSX Common Stock    
ASSETS    
Investments, at fair value: 297,865 290,752
EBP, Nonconsolidated, Plan Interest in Master Trust | Mutual funds    
ASSETS    
Investments, at fair value: 152,014 138,961
EBP, Nonconsolidated, Plan Interest in Master Trust | Common Collective Trusts    
ASSETS    
Investments, at fair value: 710,658 636,137
EBP, Nonconsolidated, Plan Interest in Master Trust | Other Common Stock    
ASSETS    
Investments, at fair value: $ 252,604 $ 240,469