Guarantees (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Guarantor Obligations [Line Items]
Environmental accruals for known contaminations	$ 439	$ 434
Joint Venture Debt Obligation Guarantees | Other joint ventures and entities
Guarantor Obligations [Line Items]
Maximum potential amount of future payments under the guarantees	$ 83
Joint venture debt obligations, period (up to)	3 years
Indemnifications
Guarantor Obligations [Line Items]
Carrying amount of indemnifications	$ 134	137
Environmental accruals for known contaminations	105	$ 108
Facilities | Residual Value Guarantees
Guarantor Obligations [Line Items]
Maximum potential amount of future payments under the guarantees	514
Railcar and Airplane | Residual Value Guarantees
Guarantor Obligations [Line Items]
Maximum potential amount of future payments under the guarantees	$ 164
Railcar and Airplane | Residual Value Guarantees | Minimum
Guarantor Obligations [Line Items]
Lessee operating lease remaining lease term (up to)	5 years
Railcar and Airplane | Residual Value Guarantees | Maximum
Guarantor Obligations [Line Items]
Lessee operating lease remaining lease term (up to)	10 years