Rail Route Network, Distance

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Rail Route Network, Distance, Partial Interest

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Business Combinations - Narrative (Details) $ in Millions		3 Months Ended		9 Months Ended	22 Months Ended
Business Combinations - Narrative (Details) $ in Millions	Jun. 01, 2022 USD ($) mi	Sep. 30, 2022 USD ($) mi	Dec. 31, 2020 USD ($)	Sep. 30, 2022 USD ($) mi	Sep. 30, 2022 USD ($) mi
Business Acquisition [Line Items]
Number of rail route miles \| mi		20,000		20,000	20,000
Pan Am Systems, Inc.
Business Acquisition [Line Items]
Business combination, closing price	$ 601
Business combination, common stock issued	422
Purchase price in cash paid for acquisition	179
Payments for deposits			$ 30
Properties acquired	$ 581
Acquisition related costs		$ 2		$ 21	$ 31
Pan Am Systems, Inc. \| Pan Am Systems, Inc.
Business Acquisition [Line Items]
Number of rail route miles \| mi	1,200
Number of partial interests in rail route miles (more than) \| mi	600