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Railway Operating Revenues - Schedule of Account Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable – net	$ 944	$ 848
Trade Accounts Receivable
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable – net	722	629
Other Receivables
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable – net	$ 222	$ 219

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- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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No definition available.

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