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Goodwill and Identifiable Intangible Assets and Liabilities - Schedule of Finite-Lived Intangible Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Schedule of Finite-Lived Intangible Liabilities [Line Items]
Finite-lived intangible liabilities, net	$ 131	$ 140
LTSA
Schedule of Finite-Lived Intangible Liabilities [Line Items]
Finite-lived intangible liabilities, net	122	128
Fuel and transportation purchase contracts
Schedule of Finite-Lived Intangible Liabilities [Line Items]
Finite-lived intangible liabilities, net	9	9
Other identifiable intangible liabilities
Schedule of Finite-Lived Intangible Liabilities [Line Items]
Finite-lived intangible liabilities, net	$ 0	$ 3