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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, 2022 | Dec. 31, 2021
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Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |
Unproved oil and natural gas properties | $ 648.9 | $ 762.2
Proved oil and natural gas properties | 19,792.6 | 19,655.8
Gross capitalized costs | 20,441.5 | 20,418.0
Accumulated depreciation, depletion and amortization |  |
Unproved oil and natural gas properties | (132.5) | (131.1)
Proved oil and natural gas properties | (12,122.9) | (12,211.0)
Net capitalized costs | 8,186.1 | 8,075.9
U.S. |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |
Unproved oil and natural gas properties | 494.6 | 602.8
Proved oil and natural gas properties | 15,051.9 | 14,690.7
Gross capitalized costs | 15,546.5 | 15,293.5
Accumulated depreciation, depletion and amortization |  |
Unproved oil and natural gas properties | (117.8) | (109.1)
Proved oil and natural gas properties | (8,873.6) | (8,821.5)
Net capitalized costs | 6,555.1 | 6,362.9
Canada |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |
Unproved oil and natural gas properties | 19.2 | 17.7
Proved oil and natural gas properties | 4,684.8 | 4,865.1
Gross capitalized costs | 4,704.0 | 4,882.8
Accumulated depreciation, depletion and amortization |  |
Unproved oil and natural gas properties | 0.0 | 0.0
Proved oil and natural gas properties | (3,208.0) | (3,320.5)
Net capitalized costs | 1,496.0 | 1,562.3
Other |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |
Unproved oil and natural gas properties | 135.1 | 141.7
Proved oil and natural gas properties | 55.9 | 100.0
Gross capitalized costs | 191.0 | 241.7
Accumulated depreciation, depletion and amortization |  |
Unproved oil and natural gas properties | (14.7) | (22.0)
Proved oil and natural gas properties | (41.3) | (69.0)
Net capitalized costs | $ 135.0 | $ 150.7

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- Definition The sum of capitalized costs relating to oil and gas producing activities before accounting for accumulated depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=126939881&loc=d3e61901-109447 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -URI https://asc.fasb.org/subtopic&trid=2145654 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=126939881&loc=d3e61901-109447 + Details
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