Long-Term Debt (Narrative) (Detail) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Senior Secured Leverage Ratio, maximum	3.75
Senior Secured Leverage Ratio	0.99
Crestwood Midstream Revolver
Debt Instrument [Line Items]
Consolidated Leverage Ratio Maximum	5.50
Crestwood Midstream Revolver \| Revolving Credit Facility
Debt Instrument [Line Items]
Available capacity	$ 636.0
Letters of credit outstanding	$ 28.0	$ 31.7
Debt, Weighted Average Interest Rate	3.16%	4.00%
Interest Coverage Ratio Minimum	2.50
Total Funded Debt to Consolidated Ebitda	4.02
Consolidated Ebitda To Consolidated Interest Expense	4.53
Crestwood Midstream Revolver \| Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	2.96%	3.96%
Crestwood Midstream Revolver \| Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.50%	6.00%
Senior Notes \| Senior Notes, due 2027
Debt Instrument [Line Items]
Senior notes	$ 600.0	$ 600.0
Senior Notes \| Senior Notes, 2025
Debt Instrument [Line Items]
Senior notes	500.0	500.0
Senior Notes \| Senior Notes, 2023
Debt Instrument [Line Items]
Senior notes	$ 700.0	$ 700.0

Consolidated EBITDA to consolidated interest expense (as defined in the Credit Agreement)

No definition available.

Name:	ceqp_ConsolidatedEbitdaToConsolidatedInterestExpense
Namespace Prefix:	ceqp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Consolidated Leverage Ratio Maximum.

+ References

No definition available.

+ Details

Name:	ceqp_ConsolidatedLeverageRatioMaximum
Namespace Prefix:	ceqp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest Coverage Ratio, Minimum

+ References

No definition available.

+ Details

Name:	ceqp_InterestCoverageRatioMinimum
Namespace Prefix:	ceqp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Senior Secured Leverage Ratio

+ References

No definition available.

+ Details

Name:	ceqp_SeniorSecuredLeverageRatio
Namespace Prefix:	ceqp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Senior Secured Leverage Ratio, maximum

+ References

No definition available.

+ Details

Name:	ceqp_SeniorSecuredLeverageRatiomaximum
Namespace Prefix:	ceqp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Total funded debt to consolidated EBITDA (as defined in the Credit Agreement)

+ References

No definition available.

+ Details

Name:	ceqp_TotalFundedDebtToConsolidatedEbitda
Namespace Prefix:	ceqp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16(a))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- Details

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

- Details

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

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ceqp_SeniorNotesdue2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ceqp_SeniorNotes2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ceqp_SeniorNotes2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: