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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
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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

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