Financial Instruments and Risk Management - Narrative (Details)	6 Months Ended	9 Months Ended
	Jun. 30, 2023 USD ($)	Sep. 30, 2023 USD ($) OffsettingPosition derivative_instrument contract	Sep. 30, 2022 USD ($) contract	Dec. 31, 2022 USD ($) OffsettingPosition	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of foreign currency derivatives (in contracts) | contract		0	0
Contingent consideration payment		$ 139,574,000	$ 0
Contingent consideration payment		$ 60,243,000	$ 81,742,000
Number of offsetting positions (in offsetting positions) | OffsettingPosition		0		0
LLOG Exploration Offshore L.L.C. and LLOG Bluewater Holdings, L.L.C. | Sales Thresholds 2019 to 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Contingent consideration, maximum					$ 200,000,000
LLOG Exploration Offshore L.L.C. and LLOG Bluewater Holdings, L.L.C. | Net crude oil and condensate revenue
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Contingent consideration, maximum					$ 50,000,000
Petrobas America Inc
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Contingent consideration, maximum				$ 150,000,000
Contingent consideration payment	$ 150,000,000
Petrobas America Inc | Sales Thresholds 2019 to 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Contingent consideration, maximum						$ 150,000,000
Petrobas America Inc | Enhanced Oil Recovery Projects
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Contingent consideration, maximum						$ 50,000,000
Commodity Swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative instruments held (in derivatives) | derivative_instrument		0
Derivative liability		$ 0		19,600,000
Derivative, fair value				0
Commodity collars
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative instruments held (in derivatives) | derivative_instrument		0
Derivative liability		$ 0		2,300,000
Derivative, fair value				0
PAI and LLOG
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative liability	$ 0			$ 192,700,000
Contingent consideration payment		$ 199,800,000