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Supplemental Oil and Gas Information (Unaudited) - Capitalized Costs Relating to Oil and Gas Producing Activities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |
Unproved oil and natural gas properties | $ 400.1 | $ 648.9
Proved oil and natural gas properties | 20,738.1 | 19,792.6
Gross capitalized costs | 21,138.2 | 20,441.5
Accumulated depreciation, depletion and amortization |  |
Unproved oil and natural gas properties | (122.7) | (132.5)
Proved oil and natural gas properties | (12,829.4) | (12,122.9)
Net capitalized costs | 8,186.1 | 8,186.1
U.S. |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |
Unproved oil and natural gas properties | 337.3 | 494.6
Proved oil and natural gas properties | 15,868.4 | 15,051.9
Gross capitalized costs | 16,205.7 | 15,546.5
Accumulated depreciation, depletion and amortization |  |
Unproved oil and natural gas properties | (105.3) | (117.8)
Proved oil and natural gas properties | (9,552.9) | (8,873.6)
Net capitalized costs | 6,547.5 | 6,555.1
Canada |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |
Unproved oil and natural gas properties | 13.1 | 19.2
Proved oil and natural gas properties | 4,716.0 | 4,684.8
Gross capitalized costs | 4,729.1 | 4,704.0
Accumulated depreciation, depletion and amortization |  |
Unproved oil and natural gas properties | 0.0 | 0.0
Proved oil and natural gas properties | (3,233.7) | (3,208.0)
Net capitalized costs | 1,495.4 | 1,496.0
Other |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |
Unproved oil and natural gas properties | 49.7 | 135.1
Proved oil and natural gas properties | 153.7 | 55.9
Gross capitalized costs | 203.4 | 191.0
Accumulated depreciation, depletion and amortization |  |
Unproved oil and natural gas properties | (17.4) | (14.7)
Proved oil and natural gas properties | (42.8) | (41.3)
Net capitalized costs | $ 143.2 | $ 135.0

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- Definition Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 932 -SubTopic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//932-360/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-13 + Details
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