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Related Parties and Affiliates - Schedule of Related Party in the Consolidated Income Statement Components (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Related Party Amounts Consolidated Income Statements [Abstract] |  |  |
Equity Earnings of Affiliates | $ (91) | $ (96) | $ (219)
Corporate Joint Venture | Conrail | Materials, Supplies and Other |  |  |
Related Party Amounts Consolidated Income Statements [Abstract] |  |  |
Rents, fees and services | 119 | 117 | 120
Purchase price amortization and other | 4 | 4 | 4
Equity Earnings of Affiliates | (42) | (43) | (58)
Total | 81 | 78 | 66
Affiliated Entity | TTX | Materials, Supplies and Other |  |  |
Related Party Amounts Consolidated Income Statements [Abstract] |  |  |
Car hire rents | 223 | 223 | 237
Equity Earnings of Affiliates | (56) | (60) | (157)
Total | $ 167 | $ 163 | $ 80

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