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Railway Operating Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 3,132	$ 2,915
Merchandise
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,878	1,672
Merchandise | Agriculture, forest and consumer products
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	653	573
Merchandise | Chemicals
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	541	498
Merchandise | Metals and construction
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	400	375
Merchandise | Automotive
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	284	226
Intermodal
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	814	854
Coal
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 440	$ 389

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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