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Investment in Affiliates and Related-Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2024
Related Party Transactions [Abstract]  
Schedule of Equity-method Investments in Affiliates
CSX's investments in affiliates are included on the consolidated balance sheet as investments in affiliates and other companies.
 DecemberDecember
(Dollars in Millions)20242023
Conrail$1,245 $1,175 
TTX1,012 961 
Other Equity Method and Cost Method Investments263 261 
Total$2,520 $2,397 
Schedule of Future Payments Under Shared Asset Area Agreements
The following table presents information about the amount, timing and uncertainty of cash flows arising from all of the Company’s operating leases as of December 31, 2024.
(Dollars in Millions)December 2024
Maturity of Lease LiabilitiesLease Payments
2025$76 
202662 
202751 
202842 
202937 
Thereafter1,086 
Total Undiscounted Operating Lease Payments$1,354 
Less: Imputed Interest(795)
Present Value of Operating Lease Liabilities$559 
Future payments due to Conrail under the shared asset area agreements are shown in the table below.
(Dollars in Millions)Conrail Shared
YearsAsset Agreement
2025$34 
202634 
202734 
202834 
202914 
Thereafter— 
Total$150 
Schedule of Related Party Transactions
The following table discloses amounts related to Conrail. All amounts in the table below are included in purchased services and other expenses on the Company’s consolidated income statements.

 Years Ended
(Dollars in Millions)202420232022
Rents, Fees and Services$142 $132 $130 
Purchase Price Amortization and Other4 4 4 
Equity Earnings of Conrail(69)(54)(44)
Total Conrail Expense$77 $82 $90 
 DecemberDecember
(Dollars in Millions)20242023
Balance Sheet Information:  
CSX Accounts Payable to Conrail$172 $154 
Promissory Notes Payable to Conrail Subsidiary  
1.31% CSX Promissory Note due December 2050
73 73 
1.31% CSXT Promissory Note due December 2050
368 368 
As required by the Related Party Disclosures Topic in the ASC, the following table discloses amounts related to TTX. Car hire rents and equity earnings are included in equipment and other rents expense on the Company’s consolidated income statement.

 Years Ended
(Dollars in Millions)202420232022
Income Statement Information:
Car Hire Rents$256 $249 $241 
Equity Earnings of TTX(50)(49)(51)
Total TTX Expense$206 $200 $190 
Also included below is balance sheet information related to CSX's payable to TTX, which represents car rental liabilities.

(Dollars in Millions)DecemberDecember
Balance Sheet Information:20242023
CSX Payable to TTX$44 $43