Segment Reporting [Abstract]
Statement [Table]
Statement [Table]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
Crestwood Midstream Partners LP
Crestwood Midstream Partners LP [Member]
Crestwood Midstream Partners LP [Member]
Segments [Axis]
Segments [Axis]
Segment [Domain]
Segments [Domain]
Gathering and Processing Operations
Gathering and Processing Segment [Member]
Gathering and Processing Segment [Member]
Storage and Transportation
Storage And Transportation Operations [Member]
Storage And Transportation Operations [Member]
Marketing Supply and Logistics
Marketing Supply and Logistics [Member]
Marketing Supply and Logistics [Member]
Corporate
Corporate Segment [Member]
Statement [Line Items]
Statement [Line Items]
Interest and debt expense, net
Interest Income (Expense), Net
Number of Operating Segments
Number of Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Segment Reporting Information, Additional Information [Abstract]
Operating revenues
Revenues
Intersegment Revenues
Intersegment Revenues
Intersegment Revenues
Costs of product/services sold
Cost of Goods and Services Sold
Operations and maintenance
Operating Costs and Expenses
General and administrative
General and Administrative Expense
Goodwill impairment
Goodwill, Impairment Loss
Loss on long-lived assets, net
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property
Earnings from unconsolidated affiliates, net
Income (Loss) from Equity Method Investments
Other income, net
Other Income
EBITDA
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Excluding Interest, Taxes, Depreciation And Amortization
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Excluding Interest, Taxes, Depreciation And Amortization
Goodwill
Goodwill
Total assets
Assets
Cash expenditures for property, plant and equipment
Payments to Acquire Productive Assets
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Fair Value Measurements
Fair Value, Measurement Inputs, Disclosure [Text Block]
Risk Management - Notional Amounts and Terms of Companys Derivative Financial Instruments [Abstract]
Risk Management - Notional Amounts and Terms of Companys Derivative Financial Instruments [Abstract]
Derivative [Table]
Derivative [Table]
Derivative Instrument Risk [Axis]
Derivative Instrument [Axis]
Derivative Contract Type [Domain]
Derivative Contract [Domain]
Commodity contract
Commodity Contract [Member]
Commodity contract with credit contingent features
Commodity Contract With Credit Contingent Features [Member]
Commodity Contract With Credit Contingent Features [Member]
NYMEX Derivative Liability
NYMEX Derivative Liability [Member]
NYMEX Derivative Liability [Member]
NYMEX Margin Deposit
NYMEX Margin Deposit [Member]
NYMEX Margin Deposit [Member]
Derivative, by Nature [Axis]
Derivative, by Nature [Axis]
Derivative, Name [Domain]
Derivative, Name [Domain]
Price Risk Contracts
Price Risk Contracts Member
Price Risk Contracts [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Maximum
Maximum [Member]
Derivative [Line Items]
Derivative [Line Items]
Gain (loss) on derivative instruments not designated as hedging
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net
Remaining maturity
Derivative, Remaining Maturity
Percent of contracts expiring in the next twelve months
Derivative Contracts, Contracts Expiring in Next Twleve Months, Percent
Derivative Contracts, Contracts Expiring in Next Twleve Months, Percent
Aggregate fair value of commodity derivative instruments
Derivative, Net Liability Position, Aggregate Fair Value
Collateral posted for commodity derivative instruments
Collateral Already Posted, Aggregate Fair Value
NYMEX margin deposits
Margin Deposit Assets
Balance Sheet Related Disclosures [Abstract]
Accrued Expenses and Other Liabilities [Table]
Accrued Expenses and Other Liabilities [Table]
Accrued Expenses and Other Liabilities [Table]
Accrued Expenses and Other Liabilities [Line Items]
Accrued Expenses and Other Liabilities [Line Items]
[Line Items] for Accrued Expenses and Other Liabilities [Table]
Accrued expenses
Other Accrued Liabilities, Current
Accrued property taxes
Accrual for Taxes Other than Income Taxes, Current
Accrued product purchases payable
Accrued Product Purchases Payable
Accrued Product Purchases Payable
Tax payable
Taxes Payable, Current
Interest payable
Interest Payable
Accrued additions to property, plant and equipment
Accrued Capital Purchases
Accrued Capital Purchases
Capital leases
Accrued Capital Leases
Accrued Capital Leases
Deferred revenue
Deferred Revenue, Current
Total accrued expenses and other liabilities
Accrued Liabilities, Current
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies [Table]
Summary Of Significant Accounting Policies [Table]
Summary Of Significant Accounting Policies [Table]
Minimum
Minimum [Member]
Subsegments [Axis]
Subsegments [Axis]
Subsegments [Domain]
Subsegments [Domain]
Marcellus
Marcellus [Member]
Marcellus [Member]
Arrow
Arrow [Member]
Arrow [Member]
Northeast Storage and Transportation
Northeast Storage and Transportation [Member]
Northeast Storage and Transportation [Member]
COLT
COLT [Member]
COLT [Member]
Supply and Logistics
Supply and Logistics [Member]
Supply and Logistics [Member]
Storage and Terminals
Storage and Terminals [Member]
Storage and Terminals [Member]
US Salt
US Salt [Member]
US Salt [Member]
Trucking
Trucking [Member]
Trucking [Member]
Summary Of Significant Accounting Policies [Line Items]
Summary Of Significant Accounting Policies [Line Items]
Summary Of Significant Accounting Policies [Line Items]
Impaired Assets to be Disposed of by Method Other than Sale, Amount of Impairment Loss
Impaired Assets to be Disposed of by Method Other than Sale, Amount of Impairment Loss
Percentage Disposition Exceeded Carrying Value Of Property Plant And Equipment
Reporting Unit Percentage Of Undiscounted Cash Flows In Excess of Carrying Amount
Reporting Unit Percentage Of Undiscounted Cash Flows In Excess of Carrying Amount
Fair Value Inputs, Discount Rate
Fair Value Inputs, Discount Rate
Deferred Finance Costs, Net
Deferred Finance Costs, Net
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Goodwill at December 31, 2015
Goodwill impairment
Goodwill at March 31, 2016
Significant Accounting Policies
Basis of Presentation and Significant Accounting Policies [Text Block]
New Accounting Pronouncements Issued But Not Yet Adopted
New Accounting Pronouncements, Policy [Policy Text Block]
Statement of Cash Flows [Abstract]
Preferred Units by Name [Axis]
Preferred Units by Name [Axis]
Preferred Units, Class [Domain]
Preferred Units, Class [Domain]
Preferred Units, Class A
Preferred Units, Class A [Member]
Preferred Units, Class A [Member]
Operating activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income (loss)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation, amortization and accretion
Other Depreciation and Amortization
Amortization of debt-related deferred costs, discounts and premiums
Amortization of Financing Costs and Discounts
Market adjustment on interest rate swaps
Increase (Decrease) in Derivative Assets
Unit-based compensation charges
Unit Based Compensation Charges
Unit Based Compensation Charges
Loss on long-lived assets, net
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Other
Other Noncash Income (Expense)
Changes in operating assets and liabilities
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Investing activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchases of property, plant and equipment
Payments to Acquire Property, Plant, and Equipment
Investment in unconsolidated affiliates
Payments to Acquire Equity Method Investments
Proceeds from sale of assets
Proceeds from Sale of Productive Assets
Other
Payments for (Proceeds from) Other Investing Activities
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
Financing activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds from the issuance of long-term debt
Proceeds from Issuance of Long-term Debt
Principal payments on long-term debt
Repayments of Long-term Debt
Payments on capital leases
Repayments of Long-term Capital Lease Obligations
Payments for debt-related deferred costs
Payments of Debt Issuance Costs
Distributions to partners
Partners' Capital Account, Distributions
Distributions to partners
Payments of Capital Distribution
Distributions paid to non-controlling partners
Payments of Ordinary Dividends, Noncontrolling Interest
Taxes paid for unit-based compensation vesting
Payments Related to Tax Withholding for Share-based Compensation
Other
Proceeds from (Payments for) Other Financing Activities
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities
Net change in cash
Cash and Cash Equivalents, Period Increase (Decrease)
Cash at beginning of period
Cash and Cash Equivalents, at Carrying Value
Cash at end of period
Supplemental schedule of noncash investing and financing activities
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Net change to property, plant and equipment through accounts payable and accrued expenses
Capital Expenditures Incurred but Not yet Paid
Statement of Partners' Capital [Abstract]
Distributions Made to Limited Partner [Table]
Distributions Made to Limited Partner [Table]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
Crestwood LTIP
Crestwood Long-Term Incentive Plan [Member]
Crestwood Long-Term Incentive Plan [Member]
Distribution Type [Axis]
Distribution Type [Axis]
Distribution Type [Domain]
Distribution Type [Domain]
Cash Distribution
Cash Distribution [Member]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Counterparty Name [Axis]
Counterparty Name [Axis]
Legal Entity Type of Counterparty [Domain]
Counterparty Name [Domain]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Equity Award [Domain]
Preferred Units
Preferred Units [Member]
Preferred Units [Member]
Common unit
Common Unit Capital [Member]
Common Unit Capital [Member]
Equity Method Investee, Name [Axis]
Investment, Name [Axis]
Investment, Name [Domain]
Investment, Name [Domain]
Jackalope Gas Gathering Services, L.L.C.
Jackalope Gas Gathering Services, L.L.C. [Member]
Jackalope Gas Gathering Services, L.L.C. [Member]
Partner Capital Components [Axis]
Partner Capital Components [Axis]
Partner Capital Components [Domain]
Partner Capital Components [Domain]
Non-Controlling Partners
Non Controlling Partners [Member]
Non-Controlling Partners [Member]
Crestwood Equity Partners LP
Crestwood Equity Partners LP [Member]
Crestwood Equity Partners LP [Member]
Crestwood Niobrara LLC
Crestwood Niobrara LLC [Member]
Crestwood Niobrara LLC [Member]
Distribution Made to Limited Partner [Line Items]
Distribution Made to Limited Partner [Line Items]
Distribution Made to Limited Partner, Distributions Declared, Per Unit
Distribution Made to Limited Partner, Distributions Declared, Per Unit
Distribution Made to Limited Partner, Distribution Date
Distribution Made to Limited Partner, Distribution Date
Distribution Made to Limited Partner, Date of Record
Distribution Made to Limited Partner, Date of Record
Incentive Distribution Rights, Ownership Percentage
Incentive Distribution Rights, Ownership Percentage
Incentive Distribution Rights, Ownership Percentage
Incentive Distribution, Distribution
Limited Partners' Capital Account, Distribution Amount
Limited Partners' Capital Account, Distribution Amount
Preferred Stock Dividends, Shares
Preferred Stock Dividends, Shares
Net Income (Loss) Attributable to Noncontrolling Interest
Net Income (Loss) Attributable to Noncontrolling Interest
Distribution Made to Limited Partner, Unit Distribution
Distribution Made to Limited Partner, Unit Distribution
Dividends, Paid-in-kind
Dividends, Paid-in-kind
Payments of Ordinary Dividends, Noncontrolling Interest
Distribution Made to Limited Partner, Cash Distributions Paid
Distribution Made to Limited Partner, Cash Distributions Paid
Preferred Units, Issued
Preferred Units, Issued
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Equity Method Investments [Table]
Schedule of Equity Method Investments [Table]
Tres Palacios Holdings LLC
Tres Palacios Holdings LLC [Member]
Tres Palacios Holdings LLC [Member]
Powder River Basin Industrial Complex, LLC
Powder River Basin Industrial Complex, LLC [Member]
Powder River Basin Industrial Complex, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments
Proceeds from Equity Method Investment, Dividends or Distributions
Payments to acquire equity method investments
Amortization
Amortization
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Parent Company
Parent Company [Member]
Guarantor Subsidiaries
Guarantor Subsidiaries [Member]
Non-Guarantor Subsidiaries
Non-Guarantor Subsidiaries [Member]
Eliminations
Consolidation, Eliminations [Member]
Assets
Assets [Abstract]
Current assets:
Assets, Current [Abstract]
Cash
Accounts receivable
Accounts Receivable, Net, Current
Inventory
Inventory, Gross
Other
Other Assets, Current
Total current assets
Assets, Current
Property, plant and equipment, net
Property, Plant and Equipment, Net
Intangible Assets, Net (Including Goodwill)
Intangible Assets, Net (Including Goodwill)
Investment in consolidated affiliates
Investment in Consolidated Subsidiaries
Investment in Consolidated Subsidiaries
Investment
Equity Method Investments
Other assets
Other Assets, Noncurrent
Total assets
Liabilities and partners’ capital
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Accounts payable
Accounts Payable, Current
Total current liabilities
Other Liabilities, Current
Total current liabilities
Liabilities, Current
Long-term liabilities:
Liabilities, Noncurrent [Abstract]
Long-term debt, less current portion (Note 7)
Long-term Debt, Excluding Current Maturities
Other long-term liabilities
Other Liabilities, Noncurrent
Deferred income taxes
Deferred Tax Liabilities, Net, Noncurrent
Partners' capital
Stockholders' Equity Attributable to Parent
Interest of non-controlling partners in subsidiary
Stockholders' Equity Attributable to Noncontrolling Interest
Total partners’ capital
Partners' Capital, Including Portion Attributable to Noncontrolling Interest
Total liabilities and partners’ capital
Liabilities and Equity
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table]
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Provision for income taxes
Income Tax Expense (Benefit)
EBITDA
Environmental Remediation Obligations [Abstract]
Site Contingency [Table]
Site Contingency [Table]
Environmental Remediation Site [Axis]
Environmental Remediation Site [Axis]
Environmental Remediation Site [Domain]
Environmental Remediation Site [Domain]
Fort Berthold Indian Reservation
Fort Berthold Indian Reservation [Member]
Fort Berthold Indian Reservation [Member]
Site Contingency [Line Items]
Site Contingency [Line Items]
Site Contingency, Loss Exposure, Number of Releases of Produced Water
Site Contingency, Loss Exposure, Number of Releases of Produced Water
Site Contingency, Loss Exposure, Number of Releases of Produced Water
Site Contingency, Loss Exposure, Release of Produced Water
Site Contingency, Loss Exposure, Release of Produced Water
Site Contingency, Loss Exposure, Release of Produced Water
Loss Contingency, Range of Possible Loss, Maximum
Loss Contingency, Range of Possible Loss, Maximum
Accrual for Environmental Loss Contingencies
Accrual for Environmental Loss Contingencies
Site Contingency, Loss Exposure in Excess of Accrual, Low Estimate
Site Contingency, Loss Exposure in Excess of Accrual, Low Estimate
Site Contingency, Loss Exposure in Excess of Accrual, High Estimate
Site Contingency, Loss Exposure in Excess of Accrual, High Estimate
Segments
Segment Reporting Disclosure [Text Block]
Commitments and Contingencies Disclosure [Abstract]
Purchase Commitment, Excluding Long-term Commitment [Table]
Purchase Commitment, Excluding Long-term Commitment [Table]
Litigation Case [Axis]
Litigation Case [Axis]
Litigation Case Type [Domain]
Litigation Case [Domain]
Arrow Acquisition Class Action Lawsuit
Arrow Acquisition Class Action Lawsuit [Member]
Arrow Acquisition Class Action Lawsuit [Member]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Self Insurance Reserve
Self Insurance Reserve
Self Insurance Reserve Expected To Be Paid Subsequent To Next Fiscal Year
Self Insurance Reserve Expected To Be Paid Subsequent To Next Fiscal Year
Self insurance reserve expected to be paid subsequent to next fiscal year.
Barrels of Oil Equivalents Spilled
Barrels of Oil Equivalents Spilled
Barrels of Oil Equivalents Spilled
Loss Contingency, Loss of Life, Number
Loss Contingency, Loss of Life, Number
Loss Contingency, Loss of Life, Number
Loss Contingency, Estimate of Possible Loss
Loss Contingency, Estimate of Possible Loss
Payments for Other Taxes
Payments for Other Taxes
Loss Contingency Accrual, at Carrying Value
Loss Contingency Accrual
Partners' Capital
Partners' Capital Notes Disclosure [Text Block]
Notional Amounts And Terms Of Company's Derivative Financial Instruments
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Statement of Financial Position [Abstract]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Accounts receivable
Assets from price risk management activities
Derivative Asset, Current
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Property, plant and equipment
Property, Plant and Equipment, Gross
Less: accumulated depreciation and depletion
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property, plant and equipment, net
Intangible assets
Intangible Assets, Gross (Excluding Goodwill)
Less: accumulated amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Intangible assets, net
Intangible Assets, Net (Excluding Goodwill)
Investment in unconsolidated affiliates (Note 4)
Total assets
Accrued expenses and other liabilities (Note 3)
Liabilities from price risk management activities
Derivative Liability, Current
Current portion of long-term debt (Note 7)
Long-term Debt, Current Maturities
Total current liabilities
Commitments and contingencies (Note 10)
Commitments and Contingencies
Partners’ capital (Note 9):
Partners' Capital [Abstract]
Crestwood Equity Partners LP partners’ capital (69,478,525 and 68,555,305 common and subordinated units issued and outstanding at March 31, 2016 and December 31, 2015)
Limited Partners' Capital Account
Preferred units (62,122,562 and 60,718,245 units issued and outstanding at March 31, 2016 and December 31, 2015)
Preferred Units, Preferred Partners' Capital Accounts
Total company partners’ capital
Partners' Capital
Interest of non-controlling partners in subsidiaries
Partners' Capital Attributable to Noncontrolling Interest
Total partners’ capital
Income Statement [Abstract]
Revenues:
Revenues [Abstract]
Gathering and processing
Gathering And Processing Product Revenues
Gathering And Processing Product Revenues
Marketing, supply and logistics
Marketing Supply And Logistics Product Revenue
Marketing Supply And Logistics Product Revenues
Total product revenue
Other Revenue, Net
Gathering and processing
Gathering and Processing Services Revenues
Gathering and Processing Services Revenues
Storage and transportation
Revenue, Storage and Transportation
Revenue, Storage and Transportation
Marketing, supply and logistics
Marketing Supply And Logistics Services Revenues
Marketing Supply And Logistics Services Revenues
Related party (Note 13)
Revenue from Related Parties
Total services revenues
Sales Revenue, Services, Net
Total revenues
Costs of product/services sold (exclusive of items shown separately below):
Cost of Goods Sold, Oil and Gas [Abstract]
Gathering and processing
Gathering And Processing Product Costs
Gathering And Processing Product Costs
Marketing, supply and logistics
Marketing, Supply And Logistics Product Costs
Marketing, Supply And Logistics Product Costs
Related party (Note 11)
Related Parties Amount in Cost of Sales
Total product costs
Cost of Goods Sold
Gathering and processing
Gathering And Processing Service Costs
Gathering And Processing Service Costs
Storage and transportation
Storage And Transportation Service Costs
Storage And Transportation Service Costs
Marketing, supply and logistics
Marketing, Supply And Logistics Service Costs
Marketing, Supply And Logistics Service Costs
Total service costs
Cost of Services
Total costs of products/services sold
Cost of Revenue
Expenses:
Operating Expenses [Abstract]
Total Expenses
Operating Expenses
Operating income (loss)
Operating Income (Loss)
Interest and debt expense, net
Interest Expense
Other income, net
Other Nonoperating Income (Expense)
Provision for income taxes
Net income (loss)
Net income (loss) attributable to parent
Net Income (Loss) Attributable to Parent
Net income (loss) attributable to preferred unit holders
Net Income (Loss) Attributable to Preferred Unit Holders
Net Income (Loss) Attributable to Preferred Unit Holders
Net income (loss) attributable to partners
Net Income (Loss), Partners Interest in Net Income
Net Income (Loss), Partners Interest in Net Income
Subordinated unitholders' interest in net income
Net Income (Loss) Allocated to Subordinated Limited Partners
Net Income (Loss) Allocated to Subordinated Limited Partners
Common unitholders' interest in net income (loss)
Net Income (Loss) Allocated to Limited Partners
Net income (loss) per limited partner unit:
Earnings Per Share [Abstract]
Basic (in dollars per share)
Earnings Per Share, Basic
Diluted (in dollars per share)
Earnings Per Share, Diluted
Weighted-average limited partners’ units outstanding (in thousands):
Net Income (Loss), Per Outstanding Limited Partnership Unit, Diluted, Other Disclosures [Abstract]
Basic (units)
Weighted Average Limited Partnership Units Outstanding, Basic
Dilutive units (units)
Weighted Average Number Diluted Limited Partnership Units Outstanding Adjustment
Diluted (units)
Weighted Average Limited Partnership Units Outstanding, Diluted
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table]
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table]
Subordinated Units
Subordinated Units [Member]
Subordinated Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Units excluded from dilutive earnings per share
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Ownership Percentage
Equity Method Investment, Ownership Percentage
Difference between carrying amount and underlying equity
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity
Risk Management
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Schedule of Distributions Made to Members or Limited Partners, by Distribution
Distributions Made to Limited Partner, by Distribution [Table Text Block]
Components of Net Income (Loss) Attributable to Non-Controlling Partners
Components of Net Income (Loss) Attributable to Non-Controlling Partners [Table Text Block]
Components of Net Income (Loss) Attributable to Non-Controlling Partners [Table Text Block]
Related Party Transactions [Abstract]
Schedule of Related Party Transactions, by Related Party [Table]
Schedule of Related Party Transactions, by Related Party [Table]
Crestwood Holdings [Member]
Crestwood Holdings [Member]
Crestwood Holdings [Member]
Related Party [Axis]
Related Party [Axis]
Related Party [Domain]
Related Party [Domain]
Affiliated Entity
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Allocated Share-based Compensation Expense
Allocated Share-based Compensation Expense
Related party receivables
Accounts Receivable, Related Parties, Current
Gathering and processing revenues at CEQP and CMLP
Gathering and processing costs of product/services sold at CEQP and CMLP(1)
Costs and Expenses, Related Party
General and administrative expenses charged by CEQP to CMLP, net(2)
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party
General and administrative expenses charged by CEQP to Crestwood Holdings, net(3)
Related Party Transaction, Expenses from Transactions with Related Party
Related Party Transaction, Due from (to) Related Party [Abstract]
Related Party Transaction, Due from (to) Related Party [Abstract]
Accounts payable
Accounts Payable, Related Parties, Current
Schedule of Accrued Liabilities
Schedule of Accrued Liabilities [Table Text Block]
Summary of Significant Accounting Policies
Significant Accounting Policies [Text Block]
Products and Services [Axis]
Products and Services [Axis]
Products and Services [Domain]
Products and Services [Domain]
Propane Crude And Heating Oil
Propane Crude And Heating Oil [Member]
Propane, Crude And Heating Oil [Member]
Fixed Price Payor
Fixed Price Payor [Member]
Fixed Price Payor [Member]
Fixed Price Receiver
Fixed Price Receiver [Member]
Fixed Price Receiver [Member]
Derivative, notional amount
Derivative, Nonmonetary Notional Amount
Disclosure Long Term Debt Components Of Long Term Debt [Abstract]
Disclosure - Long-Term Debt (Components Of Long-Term Debt) [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Revolving Credit Facility
Revolving Credit Facility [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Senior Notes
Senior Notes [Member]
Fair value adjustment of 2020 Senior Notes
Fair Value Adjustment [Member]
Fair Value Adjustment [Member]
Other
Other Liabilities [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Crestwood Midstream Revolver
Crestwood Midstream Revolver [Member]
Crestwood Midstream Revolver [Member]
Senior Notes, 2020
Senior Notes, 2020 [Member]
Senior Notes, 2020 [Member]
Senior Notes, 2022
Senior Notes, 2022 [Member]
Senior Notes, 2022 [Member]
Senior Notes, 2023
Senior Notes, 2023 [Member]
Senior Notes, 2023 [Member]
Lender Name [Axis]
Lender Name [Axis]
Line of Credit Facility, Lender [Domain]
Line of Credit Facility, Lender [Domain]
Crestwood Midstream Partners LP
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Credit agreement outstanding carrying value
Long-term Line of Credit
Senior notes
Senior Notes
Fair value adjustment
Debt Instrument, Fair Value Adjustment
Debt Instrument, Fair Value Adjustment
Other
Other Long-term Debt
Total debt
Debt, Long-term and Short-term, Combined Amount
Less: current portion
Total long-term debt, less current portion
Certain Balance Sheet Information
Supplemental Balance Sheet Disclosures [Text Block]
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Limited Partners' Capital Account, Units Issued
Limited Partners' Capital Account, Units Issued
Limited Partners' Capital Account, Units Outstanding
Limited Partners' Capital Account, Units Outstanding
Preferred Units, Outstanding
Preferred Units, Outstanding
Reconciliation of Net Income (Loss) to Earnings Before Interest, Taxes, Depreciation and Amortization
Reconciliation of Net Income (Loss) to Earnings Before Interest, Taxes, Depreciation and Amortization [Table Text Block]
Reconciliation of Net Income (Loss) to Earnings Before Interest, Taxes, Depreciation and Amortization [Table Text Block]
Summary Of Segment Information
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Partner Type [Axis]
Partner Type [Axis]
Partner Type of Partners' Capital Account, Name [Domain]
Partner Type of Partners' Capital Account, Name [Domain]
Limited Partner [Member]
Limited Partner [Member]
Net income attributable to non-controlling partners in subsidiaries
Condensed Consolidating Financial Information
Condensed Consolidating Financial Information Disclosure [Text Block]
Condensed Consolidating Financial Information Disclosure [Text Block]
Document and Entity Information [Abstract]
Document and Entity Information [Abstract]
Document Information [Table]
Document Information [Table]
Document Information, Document [Axis]
Document Information, Document [Axis]
Document [Domain]
Document [Domain]
Document Information [Line Items]
Document Information [Line Items]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Trading Symbol
Trading Symbol
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]
Assets And Liabilities Measured At Fair Value On Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Earnings Per Limited Partner Unit
Earnings Per Share [Text Block]
Condensed Balance Sheet
Condensed Balance Sheet [Table Text Block]
Condensed Income Statement
Condensed Income Statement [Table Text Block]
Condensed Cash Flow Statement
Condensed Cash Flow Statement [Table Text Block]
Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit
Distribution Made to Limited Partner, Distributions Paid, Per Unit
Disclosure Partnership Organization And Basis Of Presentation Narrative [Abstract]
Disclosure - Partnership Organization And Basis Of Presentation (Narrative) [Abstract]
Organization and Business Description
Partnership Organization And Basis Of Presentation [Text Block]
Description of the organization structure, consolidation principles and nature of operations of the limited liability company or limited partnership.
Investments in Unconsolidated Affiliates
Equity Method Investments and Joint Ventures Disclosure [Text Block]
Revenues
Total costs of products/services sold
General and administrative
Costs and Expenses
Costs and Expenses
Loss on long-lived assets, net
Gain (Loss) on Disposition of Assets
Goodwill impairment
Loss from unconsolidated affiliates
Income (Loss) from Subsidiaries, before Tax
Net income (loss) attributable to parent
Subsequent Events [Abstract]
Subsequent Event [Table]
Subsequent Event [Table]
CEGP
CEGP [Member]
CEGP [Member]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Cash flows from operating activities
Cash flows from investing activities:
Purchases of property, plant and equipment
Capital contributions to consolidated affiliates
Proceeds from Contributed Capital
Payments for (Proceeds from) Other Investing Activities
Net cash used in investing activities
Cash flows from financing activities:
Distributions to partners
Change in intercompany balances
Increase (Decrease) in Accounts Payable, Related Parties
Net cash provided by (used in) financing activities
Net change in cash
Schedule of Related Party Transactions
Schedule of Related Party Transactions [Table Text Block]
Schedule of Related Party Receivables and Payables
Schedule of Related Party Receivables and Payables [Table Text Block]
Schedule of Related Party Receivables and Payables [Table Text Block]
Statement of Comprehensive Income [Abstract]
Net income (loss)
Change in fair value of Suburban Propane Partners, L.P. units
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Comprehensive income (loss) attributable to Crestwood Equity Partners LP
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Subsequent Events [Text Block]
Subsequent Events [Text Block]
Fair Value Disclosures [Abstract]
Carrying amount
Fair value
Debt Instrument, Fair Value Disclosure
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value, Hierarchy [Axis]
Fair Value, Hierarchy [Axis]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy [Domain]
Level 1
Fair Value, Inputs, Level 1 [Member]
Level 2
Fair Value, Inputs, Level 2 [Member]
Level 3
Fair Value, Inputs, Level 3 [Member]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurement Frequency [Domain]
Fair Value, Measurements, Recurring
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management
Price Risk Derivative Assets, at Fair Value
SPH units
Investment Owned, at Fair Value
Assets, Fair Value Disclosure, Excluding Netting Adjustments
Assets, Fair Value Disclosure, Excluding Netting Adjustments
Assets, Fair Value Disclosure, Excluding Netting Adjustments
Netting agreements
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset
Derivative Asset, Fair Value of Collateral
Derivative Asset, Fair Value of Collateral
Assets from price risk management, total
Derivative Asset
Total assets at fair value
Assets, Fair Value Disclosure
Liabilities from price risk management
Price Risk Derivative Liabilities, at Fair Value
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments
Netting agreements
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset
Derivative Liability, Fair Value of Collateral
Derivative Liability, Fair Value of Collateral
Liabilities from price risk management, total
Derivative Liability
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill
Goodwill Disclosure [Text Block]
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Common Units
Common Units [Member]
Common Units [Member]
Partners' Capital
Partners' Capital [Member]
Partners' Capital [Member]
Common Unit, Outstanding
Common Unit, Outstanding
Increase (Decrease) in Partners' Capital [Roll Forward]
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2015
Distributions to partners
Unit-based compensation charges
Partners' Capital Account, Unit-based Compensation
Partners' Capital Account, Units, Unit-based Compensation
Partners' Capital Account, Units, Unit-based Compensation
Taxes paid for unit-based compensation vesting
Adjustments Related to Tax Withholding for Share-based Compensation
Other
Partners' Capital, Other
Balance at March 31, 2016
Equity Method Investments
Equity Method Investments [Table Text Block]
Text Block [Abstract]
Long-Term Debt
Long-term Debt [Text Block]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Interest, Taxes, Depreciation and Amortization included in Earnings from Equity Method Investments
Interest, Taxes, Depreciation and Amortization included in Earnings from Equity Method Investments
Interest, Taxes, Depreciation and Amortization included in Earnings from Equity Method Investments
Components Of Long-Term Debt
Schedule of Long-term Debt Instruments [Table Text Block]
Disclosure Long Term Debt Narrative [Abstract]
Disclosure - Long-Term Debt (Narrative) [Abstract]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Contracts Scenario [Axis]
Contracts Scenario [Axis]
Contracts, Scenario [Axis]
Contracts Scenario [Domain]
Contracts Scenario [Domain]
Contracts, Scenario [Domain]
Debt Instruments, Basis Interest Rate [Axis]
Debt Instruments Basis Interest Rate [Axis]
Debt Instruments, Basis Interest Rate [Axis]
Debt Instruments, Basis Interest Rate [Domain]
Debt Instruments Basis Interest Rate [Domain]
Debt Instruments, Basis Interest Rate [Domain]
Credit agreement outstanding carrying value
Line of Credit Facility, Maximum Borrowing Capacity
Long-term Debt
Long-term Debt
Letters of credit outstanding
Letters of Credit Outstanding, Amount
Debt Instrument, Unused Borrowing Capacity, Amount
Debt Instrument, Unused Borrowing Capacity, Amount
Total Funded Debt to Consolidated Ebitda
Total Funded Debt to Consolidated Ebitda
Total funded debt to consolidated EBITDA (as defined in the Credit Agreement)
Consolidated Ebitda To Consolidated Interest Expense
Consolidated Ebitda To Consolidated Interest Expense
Consolidated EBITDA to consolidated interest expense (as defined in the Credit Agreement)
Senior Secured Leverage Ratio
Senior Secured Leverage Ratio
Senior Secured Leverage Ratio
Repayments of Long-term Debt
Debt, Weighted Average Interest Rate
Debt, Weighted Average Interest Rate
Debt Instrument, Interest Rate, Stated Percentage
Debt Instrument, Interest Rate, Stated Percentage
Proceeds from Issuance of Debt
Proceeds from Issuance of Debt
Consolidated Leverage Ratio Maximum
Consolidated Leverage Ratio Maximum
Consolidated Leverage Ratio Maximum.
Interest Coverage Ratio Minimum
Interest Coverage Ratio Minimum
Interest Coverage Ratio, Minimum
Senior Secured Leverage Ratio, maximum
Senior Secured Leverage Ratio, maximum
Senior Secured Leverage Ratio, maximum