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Investments - Schedule of Investments (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Long-term investments:	$ 2,923	$ 2,797
COLI at net cash surrender value	752	885
Other investments	19	25
Total long-term investments	3,694	3,707
Conrail
Schedule of Investments [Line Items]
Long-term investments:	1,584	1,526
TTX Company
Schedule of Investments [Line Items]
Long-term investments:	918	851
Other
Schedule of Investments [Line Items]
Long-term investments:	$ 421	$ 420

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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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