Related Parties and Affiliates - Schedule of Related Party Consolidated Balance Sheet Components (Details) - USD ($) $ in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
Related Party Transaction [Line Items] | ||
Payable to Affiliates | $ 0 | $ 0 |
Corporate Joint Venture | Conrail | Accounts Payable | ||
Related Party Transaction [Line Items] | ||
Payable to Affiliates | 213 | 153 |
Corporate Joint Venture | Conrail | Long-term Debt | 2.89% CSX promissory note due October 2044 | ||
Related Party Transaction [Line Items] | ||
Promissory notes payable to Conrail subsidiary | $ 73 | $ 73 |
Related party note, interest rate (as a percent) | 2.89% | 2.89% |
Corporate Joint Venture | Conrail | Long-term Debt | 2.89% CSXT promissory note due October 2044 | ||
Related Party Transaction [Line Items] | ||
Promissory notes payable to Conrail subsidiary | $ 151 | $ 151 |
Related party note, interest rate (as a percent) | 2.89% | 2.89% |
Affiliated Entity | TTX | Accounts Payable | ||
Related Party Transaction [Line Items] | ||
Payable to Affiliates | $ 34 | $ 36 |