Supplemental Oil and Gas Information (Unaudited) - Principal Sources of Change in the Standardized Measure of Discounted Future Net Cash Flows (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) $ / bbl	Dec. 31, 2022 USD ($) $ / bbl	Dec. 31, 2021 USD ($) $ / bbl
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Net changes in prices and production costs	$ (5,845.6)	$ 4,812.2	$ 5,962.1
Net changes in development costs	(78.8)	(531.1)	(503.6)
Sales and transfers of oil and natural gas produced, net of production costs	(2,264.8)	(2,917.4)	(2,220.5)
Net change due to extensions and discoveries	770.4	1,223.5	908.5
Net change due to purchases and sales of proved reserves	(96.1)	102.1	63.1
Development costs incurred	703.7	769.3	619.3
Accretion of discount	1,393.3	802.6	267.2
Revisions of previous quantity estimates	(771.5)	1,652.9	277.1
Net change in income taxes	1,229.6	(1,399.9)	(692.8)
Net increase (decrease)	(4,959.8)	4,514.2	4,680.4
Standardized measure, beginning balance	11,813.2	7,299.0	2,618.6
Standardized measure, ending balance	$ 6,853.4	$ 11,813.2	$ 7,299.0
Net crude oil and condensate revenue
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Average production costs per barrel of oil (in dollars per barrel) | $ / bbl	78.22	93.67	66.56
Net natural gas revenue
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]
Average production costs per volume of natural gas (in dollars per cubic foot) | $ / bbl	2.64	6.36	3.60