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Other Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule of Investments [Line Items] |  |
Non-current operating lease liability (Note 10) | $ 344 | $ 441
Casualty and other claims (Note 17) | 169 | 171
Deferred compensation | 107 | 104
Other | 187 | 159
Total | 1,987 | 1,744
Conrail Inc. |  |
Schedule of Investments [Line Items] |  |
Long-term advances from Conrail (Note 6) | 534 | 280
Pension Plan |  |
Schedule of Investments [Line Items] |  |
Defined benefit pension plan, liabilities, noncurrent (Note 12) | 340 | 302
Other Postretirement Benefits Plan |  |
Schedule of Investments [Line Items] |  |
Defined benefit pension plan, liabilities, noncurrent (Note 12) | $ 306 | $ 287

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