Debt Instrument, Covenant, Net Leverage Ratio

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- Definition

Restricted Cash Required, Period For Contractual Future Payments

+ References

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

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- Definition

Carrying amount as of the balance sheet date of petroleum or crude oil.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- Definition

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 330
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.BB)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480581/330-10-S99-2

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-Topic 210
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-Section S99
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- References

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Accounting Policies - Narrative (Details) $ in Millions	6 Months Ended
Accounting Policies - Narrative (Details) $ in Millions	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2024	Apr. 30, 2024	Mar. 31, 2024	Oct. 31, 2021	Mar. 31, 2021	Apr. 30, 2019
Inventories
Materials and supplies inventory	$ 151.5	$ 167.5
Hydrocarbons inventory	$ 11.7	$ 3.4
Facility
Cash, Cash Equivalents and Restricted Cash
Net leverage ratio		2.54		2.50
Facility \| Senior Notes
Cash, Cash Equivalents and Restricted Cash
Net leverage ratio		2.54
Facility Interest or Senior Notes
Cash, Cash Equivalents and Restricted Cash
Period for contractual future interest payments	6 months
7.125% Senior Notes \| Senior Notes
Cash, Cash Equivalents and Restricted Cash
Interest rate (as a percent)								7.125%
7.750% Senior Notes \| Senior Notes
Cash, Cash Equivalents and Restricted Cash
Interest rate (as a percent)						7.75%
7.500% Senior Notes \| Senior Notes
Cash, Cash Equivalents and Restricted Cash
Interest rate (as a percent)							7.50%
8.750% Senior Notes \| Senior Notes
Cash, Cash Equivalents and Restricted Cash
Interest rate (as a percent)			8.75%
3.125% Convertible Senior Notes \| Senior Notes
Cash, Cash Equivalents and Restricted Cash
Interest rate (as a percent)	3.125%	3.125%			3.125%