Asset financing arrangement

No definition available.

Name:	clmt_AssetFinancingArrangement
Namespace Prefix:	clmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of warrants or rights issued.

+ References

No definition available.

+ Details

Name:	clmt_ClassOfWarrantOrRightIssued
Namespace Prefix:	clmt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

MRL asset financing arrangement

+ References

No definition available.

+ Details

Name:	clmt_MRLAssetFinancingArrangement
Namespace Prefix:	clmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

MRL revolving credit agreement

+ References

No definition available.

+ Details

Name:	clmt_MrlRevolvingCreditAgreement
Namespace Prefix:	clmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

MRL Term Loan Credit Agreement

+ References

No definition available.

+ Details

Name:	clmt_MrlTermLoanCreditAgreement
Namespace Prefix:	clmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

+ Details

Name:	us-gaap_DebtInstrumentFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

+ References

+ Details

Name:	us-gaap_LinesOfCreditFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of contractual obligation to pay money on demand or on fixed or determinable dates.

+ References

+ Details

Name:	us-gaap_LoansPayableFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of notes payable.

+ References

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

Reference 2: 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(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: 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(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_NotesPayableFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=clmt_ShreveportTerminalAssetFinancingArrangementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=clmt_MontanaTerminalAssetFinancingArrangementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=clmt_MontanaRefineryAssetFinancingArrangementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=clmt_U.s.DepartmentOfEnergyGuaranteedLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Fair Value Measurements - Carrying Value (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Jul. 10, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Class of warrants issued	2,000,000	2,000,000	2,000,000
Exercise price			$ 20
MRL term loan credit agreement		$ 73.7
MRL asset financing arrangements		368.1
Shreveport terminal asset financing arrangement
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Asset financing arrangement	$ 40.0	42.1
Montana terminal asset financing arrangement
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Asset financing arrangement	27.8	30.4
Montana refinery asset financing arrangement
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Asset financing arrangement	147.5	108.7
Fair Value \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Notes payable, fair value disclosure	1,246.3	1,218.3
Fair Value \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions
MRL revolving credit agreement		0.0
MRL term loan credit agreement		73.7
MRL asset financing arrangements		368.1
Finance leases and other obligations	2.6	2.9
Fair Value \| Level 3 \| Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Revolving credit facility	53.8	286.6
Fair Value \| Level 3 \| Borrowings under the DOE Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions
DOE Loan	786.1	0.0
Fair Value \| Level 3 \| Shreveport terminal asset financing arrangement
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Asset financing arrangement	40.0	42.1
Fair Value \| Level 3 \| Montana terminal asset financing arrangement
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Asset financing arrangement	27.8	30.4
Fair Value \| Level 3 \| Montana refinery asset financing arrangement
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Asset financing arrangement	147.5	108.7
Carrying Value \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Notes payable, fair value disclosure	1,293.1	1,196.7
Carrying Value \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions
MRL revolving credit agreement		(0.3)
MRL term loan credit agreement		71.4
MRL asset financing arrangements		365.4
Finance leases and other obligations	2.6	2.9
Carrying Value \| Level 3 \| Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Revolving credit facility	51.2	283.6
Carrying Value \| Level 3 \| Borrowings under the DOE Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions
DOE Loan	765.8
Carrying Value \| Level 3 \| Shreveport terminal asset financing arrangement
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Asset financing arrangement	39.6	41.6
Carrying Value \| Level 3 \| Montana terminal asset financing arrangement
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Asset financing arrangement	27.6	30.2
Carrying Value \| Level 3 \| Montana refinery asset financing arrangement
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Asset financing arrangement	$ 146.2	$ 108.7