Fair Value Measurement - Unobservable inputs (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other Assets, Current	$ 406	$ 381
Other Assets, Noncurrent	1,709	1,601
Gulf of Mexico Contingent Consideration
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at January 1, 2023	57
Net unrealized gain related to assets still held at the end of the period	1
Settlements	(11)
Fair value at September 30, 2023	47
Deepwater Gulf of Mexico Interests | Freeport-McMoRan Oil & Gas
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent Receivable			$ 150
Other Assets, Current	17	20
Other Assets, Noncurrent	$ 38	$ 47