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Consolidated Leverage Ratio Maximum.

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Interest Coverage Ratio, Minimum

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- Definition

Line of Credit Facility, Additional Potential Capacity

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- Definition

Senior Secured Leverage Ratio

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No definition available.

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- Definition

Senior Secured Leverage Ratio, maximum

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- Definition

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

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No definition available.

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

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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.

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No definition available.

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

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- Definition

Weighted average interest rate of debt outstanding.

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No definition available.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Gross amount of debt extinguished.

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No definition available.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

Amount of cash paid for interest. Includes, but is not limited to, payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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- Definition

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

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No definition available.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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No definition available.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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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.

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Long-Term Debt (Narrative) (Detail) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
Long-Term Debt (Narrative) (Detail) $ in Millions	Jun. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Senior Secured Leverage Ratio		1.11		1.11
Repayments of Senior Debt	$ 312.9
Gains (Losses) on Extinguishment of Debt	10.0	$ 0.0	$ 0.0	$ 37.7	$ (10.0)
Deferred finance costs, net		$ 30.2		30.2		$ 34.0
Repayments of Long-term Debt				$ 2,159.2	2,279.4
Senior Secured Leverage Ratio, maximum		3.75		3.75
Crestwood Midstream Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Additional Potential Capacity		$ 350.0		$ 350.0
Senior Notes, 2025 \| Senior Notes
Debt Instrument [Line Items]
Senior notes		$ 500.0		$ 500.0		0.0
Debt Instrument, Interest Rate, Stated Percentage		5.75%		5.75%
Crestwood Midstream Revolver
Debt Instrument [Line Items]
Consolidated Leverage Ratio Maximum				5.50
Crestwood Midstream Revolver \| Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding		$ 63.6		$ 63.6		64.0
Debt Instrument, Unused Borrowing Capacity, Amount		548.7		548.7
Credit agreement outstanding carrying value		$ 444.1		$ 444.1		$ 77.0
Total Funded Debt to Consolidated Ebitda				4.13
Consolidated Ebitda To Consolidated Interest Expense				4.08
Debt, Weighted Average Interest Rate		3.50%		3.50%		3.23%
Interest Coverage Ratio Minimum				2.50
Crestwood Midstream Revolver \| Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate		3.49%		3.49%		3.21%
Crestwood Midstream Revolver \| Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate		5.50%		5.50%		5.25%
Senior Notes, 2020
Debt Instrument [Line Items]
Repayments of Senior Debt				$ 349.9
Extinguishment of Debt, Amount	161.2
Senior Notes, 2020 \| Senior Notes
Debt Instrument [Line Items]
Interest Paid				5.1
Senior notes		$ 0.0		0.0		$ 338.8
Senior Notes, 2022
Debt Instrument [Line Items]
Repayments of Senior Debt				457.8
Extinguishment of Debt, Amount	$ 163.6
Deferred finance costs, net		6.8		6.8
Senior Notes, 2022 \| Senior Notes
Debt Instrument [Line Items]
Interest Paid				1.0
Senior notes		0.0		0.0		436.4
Senior Notes, 2023 \| Senior Notes
Debt Instrument [Line Items]
Senior notes		700.0		700.0		700.0
Crestwood Midstream Partners LP \| Senior Notes, 2025 \| Senior Notes
Debt Instrument [Line Items]
Proceeds from Issuance of Debt				492.0
Crestwood Midstream Partners LP
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt		0.0	$ 0.0	37.7	(10.0)
Repayments of Long-term Debt				2,159.2	$ 2,279.2
Crestwood Midstream Partners LP \| Senior Notes, 2025
Debt Instrument [Line Items]
Senior notes		492.1		492.1		0.0
Crestwood Midstream Partners LP \| Senior Notes, 2020
Debt Instrument [Line Items]
Senior notes		0.0		0.0		340.6
Crestwood Midstream Partners LP \| Senior Notes, 2022
Debt Instrument [Line Items]
Senior notes		0.0		0.0		429.3
Crestwood Midstream Partners LP \| Senior Notes, 2023
Debt Instrument [Line Items]
Senior notes		$ 691.7		$ 691.7		$ 690.6