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Railway Operating Revenues - Schedule of Account Receivables (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Accounts receivable – net | $ 822 | $ 920
Trade Accounts Receivable |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Accounts receivable – net | 592 | 682
Other Receivables |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Accounts receivable – net | 230 | 238
Other Noncurrent Receivables |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Accounts receivable, net, noncurrent | $ 23 | $ 23

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