Crestwood Equity Partners (CEQP) 10-Q 2 Aug 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 31, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	CEQP
Entity Registrant Name	Crestwood Equity Partners LP
Entity Central Index Key	1,136,352
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		71,214,368
Crestwood Midstream Partners LP
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Entity Registrant Name	Crestwood Midstream Partners LP
Entity Central Index Key	1,304,464
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		0

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Assets
Cash	$ 6.1	$ 1.3
Accounts receivable, less allowance for doubtful accounts of $0.3 million and $2.4 million at June 30, 2018 and December 31, 2017	326.6	442.7
Inventory	73.6	68.4
Assets from price risk management activities	6	7.2
Disposal Group, Including Discontinued Operation, Assets, Current	54	3
Prepaid expenses and other current assets	8.3	7.9
Total current assets	474.6	530.5
Property, plant and equipment	2,409.8	2,285.2
Less: accumulated depreciation and depletion	518.1	464.4
Property, plant and equipment, net	1,891.7	1,820.8
Intangible assets	770.3	788.8
Less: accumulated amortization	195.7	191.6
Intangible assets, net	574.6	597.2
Goodwill	138.6	147.6
Investments in unconsolidated affiliates	1,156.7	1,183
Other non-current assets	5.7	5.8
Total assets	4,241.9	4,284.9
Current liabilities:
Accounts payable	310.5	349.4
Accrued expenses and other liabilities	85.2	105.9
Liabilities from price risk management activities	23	48.9
Current portion of long-term debt	0.9	0.9
Total current liabilities	419.6	505.1
Long-term debt, less current portion	1,561	1,491.3
Other long-term liabilities	166.2	104.7
Deferred income taxes	3.1	3.3
Commitments and contingencies (Note 11)
Partners’ capital:
Crestwood Equity Partners LP partners’ capital (71,657,106 and 70,721,563 common and subordinated units issued and outstanding at June 30, 2018 and December 31, 2017)	1,300.3	1,393.5
Preferred units (71,257,445 units issued and outstanding at both June 30, 2018 and December 31, 2017)	612	612
Partners' capital	1,912.3	2,005.5
Interest of non-controlling partner in subsidiary	179.7	175
Total partners’ capital	2,092	2,180.5
Total liabilities and partners’ capital	4,241.9	4,284.9
Crestwood Midstream Partners LP
Assets
Cash	5.7	1
Accounts receivable, less allowance for doubtful accounts of $0.3 million and $2.4 million at June 30, 2018 and December 31, 2017	324.3	442.6
Inventory	73.6	68.4
Assets from price risk management activities	6	7.2
Disposal Group, Including Discontinued Operation, Assets, Current	54	3
Prepaid expenses and other current assets	8.3	7.9
Total current assets	471.9	530.1
Property, plant and equipment	2,739.9	2,615.3
Less: accumulated depreciation and depletion	668.6	607.8
Property, plant and equipment, net	2,071.3	2,007.5
Intangible assets	770.3	773.3
Less: accumulated amortization	195.7	177.6
Intangible assets, net	574.6	595.7
Goodwill	138.6	147.6
Investments in unconsolidated affiliates	1,156.7	1,183
Other non-current assets	2.4	2.4
Total assets	4,415.5	4,466.3
Current liabilities:
Accounts payable	307.8	346.8
Accrued expenses and other liabilities	84.2	104.7
Liabilities from price risk management activities	23	48.9
Current portion of long-term debt	0.9	0.9
Total current liabilities	415.9	501.3
Long-term debt, less current portion	1,561	1,491.3
Other long-term liabilities	163.7	102.6
Deferred income taxes	0.6	0.7
Partners’ capital:
Partners' capital	2,094.6	2,195.4
Interest of non-controlling partner in subsidiary	179.7	175
Total partners’ capital	2,274.3	2,370.4
Total liabilities and partners’ capital	$ 4,415.5	$ 4,466.3

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Allowance for doubtful accounts	$ 0.3	$ 2.4
Limited Partners' Capital Account, Units Issued	71,657,106	70,721,563
Limited Partners' Capital Account, Units Outstanding	71,657,106	70,721,563
Preferred Units, Issued	71,257,445	71,257,445
Preferred Units, Outstanding	71,257,445	71,257,445
Crestwood Midstream Partners LP
Allowance for doubtful accounts	$ 0.3	$ 2.4

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues:
Gathering and processing	$ 186.9	$ 325.3	$ 459.1	$ 618.4
Marketing, supply and logistics	562.7	421.5	1,316.1	851.7
Total product revenues	749.6	746.8	1,775.2	1,470.1
Gathering and processing	68.5	79.4	136.6	154.4
Storage and transportation	5.1	8.5	9.3	18.5
Marketing, supply and logistics	17	15.2	33.8	34.5
Related party (Note 12)	0.3	0.4	0.6	0.9
Total services revenues	90.9	103.5	180.3	208.3
Total revenues	840.5	850.3	1,955.5	1,678.4
Costs of product/services sold (exclusive of items shown separately below):
Product costs	681.8	713.7	1,620.7	1,380.4
Product costs - related party (Note 12)	32.2	4	45.3	8.1
Service costs	11.4	11.9	25.2	24.6
Total costs of product/services sold	725.4	729.6	1,691.2	1,413.1
Operating expenses and other:
Operations and maintenance	31.9	34.2	66.4	67.9
General and administrative	23.4	22.7	47.3	49.1
Depreciation, amortization and accretion	44.5	48.7	89.6	97.1
Loss on long-lived assets, net	24.4	0	24.1	0
Total expenses	124.2	105.6	227.4	214.1
Operating income (loss)	(9.1)	15.1	36.9	51.2
Earnings from unconsolidated affiliates, net	12	9.6	24.4	17.7
Interest and debt expense, net	(24.3)	(24.1)	(48.7)	(50.6)
Loss on modification/extinguishment of debt	0	(0.4)	0	(37.7)
Other income, net	0.1	0.1	0.2	0.2
Income (loss) before income taxes	(21.3)	0.3	12.8	(19.2)
(Provision) benefit for income taxes	(0.2)	0	(0.2)	0.1
Net income (loss)	(21.5)	0.3	12.6	(19.1)
Net Income Attributable to Noncontrolling Interest	4	6.3	8	12.4
Net income (loss) attributable to parent	(25.5)	(6)	4.6	(31.5)
Net income attributable to preferred unit holders	15.1	13.5	30.1	31.3
Net loss attributable to partners	(40.6)	(19.5)	(25.5)	(62.8)
Common unitholders’ interest in net loss	$ (40.6)	$ (19.5)	$ (25.5)	$ (62.8)
Net loss per limited partner unit:
Basic (in dollars per share)	$ (0.57)	$ (0.28)	$ (0.36)	$ (0.90)
Diluted (in dollars per share)	$ (0.57)	$ (0.28)	$ (0.36)	$ (0.90)
Weighted-average limited partners’ units outstanding (in thousands):
Basic (units)	71,225	69,655	71,195	69,676
Dilutive units (units)	0	0	0	0
Diluted (units)	71,225	69,655	71,195	69,676
Crestwood Midstream Partners LP
Revenues:
Gathering and processing	$ 186.9	$ 325.3	$ 459.1	$ 618.4
Marketing, supply and logistics	562.7	421.5	1,316.1	851.7
Total product revenues	749.6	746.8	1,775.2	1,470.1
Gathering and processing	68.5	79.4	136.6	154.4
Storage and transportation	5.1	8.5	9.3	18.5
Marketing, supply and logistics	17	15.2	33.8	34.5
Related party (Note 12)	0.3	0.4	0.6	0.9
Total services revenues	90.9	103.5	180.3	208.3
Total revenues	840.5	850.3	1,955.5	1,678.4
Costs of product/services sold (exclusive of items shown separately below):
Product costs	681.8	713.7	1,620.7	1,380.4
Product costs - related party (Note 12)	32.2	4	45.3	8.1
Service costs	11.4	11.9	25.2	24.6
Total costs of product/services sold	725.4	729.6	1,691.2	1,413.1
Operating expenses and other:
Operations and maintenance	31.9	34.2	66.4	67.9
General and administrative	22.5	22.1	45.3	47.6
Depreciation, amortization and accretion	47.4	51.4	95.2	102.6
Loss on long-lived assets, net	24.4	0	24.1	0
Total expenses	126.2	107.7	231	218.1
Operating income (loss)	(11.1)	13	33.3	47.2
Earnings from unconsolidated affiliates, net	12	9.6	24.4	17.7
Interest and debt expense, net	(24.3)	(24.1)	(48.7)	(50.6)
Loss on modification/extinguishment of debt	0	(0.4)	0	(37.7)
Income (loss) before income taxes	(23.4)	(1.9)	9	(23.4)
(Provision) benefit for income taxes	(0.1)	0	(0.1)	0.1
Net income (loss)	(23.5)	(1.9)	8.9	(23.3)
Net Income Attributable to Noncontrolling Interest	4	6.3	8	12.4
Net income (loss) attributable to parent	$ (27.5)	$ (8.2)	$ 0.9	$ (35.7)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (21.5)	$ 0.3	$ 12.6	$ (19.1)
Change in fair value of Suburban Propane Partners, L.P. units	0.2	(0.5)	(0.1)	(0.9)
Comprehensive income (loss)	(21.3)	(0.2)	12.5	(20)
Comprehensive income attributable to non-controlling partner	4	6.3	8	12.4
Comprehensive income (loss) attributable to Crestwood Equity Partners LP	$ (25.3)	$ (6.5)	$ 4.5	$ (32.4)

Consolidated Statement of Partn

Consolidated Statement of Partners' Capital - USD ($) $ in Millions	Total	Preferred Units	Common unit	Non-Controlling Partners	Partners' Capital	Crestwood Midstream Partners LP	Crestwood Midstream Partners LPCommon unit	Crestwood Midstream Partners LPNon-Controlling Partners	Crestwood Midstream Partners LPPartners' Capital	Preferred Units	Common Units	Subordinated Units
Common Unit, Outstanding											70,300,000	400,000
Preferred Units, Outstanding	71,257,445									71,300,000
Balance at December 31, 2017 at Dec. 31, 2017	$ 2,005.5	$ 612	$ 1,393.5	$ 175	$ 2,180.5	$ 2,195.4	$ 2,195.4	$ 175	$ 2,370.4
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(30)	(85.4)	(3.3)	(118.7)		(120)	(3.3)	(123.3)
Distributions to partners (in shares)										0
Unit-based compensation charges		0	17.5	0	17.5		17.5	0	17.5
Unit-based compensation charges (in shares)											1,200,000
Taxes paid for unit-based compensation vesting		0	(6.9)	0	(6.9)		(6.9)	0	(6.9)
Taxes paid for unit-based compensation vesting (in shares)											(200,000)
Change in fair value of Suburban Propane Partners, L.P. units	(0.1)	0	(0.1)	0	(0.1)
Other		(0.1)	(0.3)	0	(0.4)		0.2	0	0.2
Net income attributable to preferred unit holders	30.1	30.1
Net loss attributable to partners	(25.5)		(25.5)
Net Income Attributable to Noncontrolling Interest	8			8		8
Net income (loss)	12.6				12.6	8.9	0.9		8.9
Balance at June 30, 2018 at Jun. 30, 2018	$ 1,912.3	612	1,300.3	$ 179.7	2,092	$ 2,094.6	2,094.6	179.7	2,274.3
Common Unit, Outstanding											71,300,000	400,000
Preferred Units, Outstanding	71,257,445									71,300,000
Increase (Decrease) in Partners' Capital [Roll Forward]
Cumulative effect of accounting change (Note 2)		$ 0	$ 7.5		$ 7.5		$ 7.5	$ 0	$ 7.5

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net income (loss)	$ 12.6	$ (19.1)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	89.6	97.1
Amortization of debt-related deferred costs	3.6	3.5
Unit-based compensation charges	17.5	12.7
Gain on long-lived assets, net	24.1	0
Loss on modification/extinguishment of debt	0	37.7
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	(0.2)	0.5
Deferred income taxes	(0.2)	(0.7)
Other	0.2	(0.4)
Changes in operating assets and liabilities	12.8	1.6
Net cash provided by operating activities	160	132.9
Investing activities
Purchases of property, plant and equipment	(118.7)	(88.7)
Investment in unconsolidated affiliates	(6.9)	(18.5)
Capital distributions from unconsolidated affiliates	23.9	21.1
Net proceeds from sale of assets	6.8	1
Net cash used in investing activities	(94.9)	(85.1)
Financing activities
Proceeds from the issuance of long-term debt	847.1	1,680.4
Payments on long-term debt	(781)	(1,630.3)
Payments on capital leases	(0.7)	(1.3)
Payments for debt-related deferred costs	0	(1)
Distributions to partners	(85.4)	(83.6)
Distributions to non-controlling partner	(3.3)	(7.6)
Distribution to preferred unit holders	(30)	0
Taxes paid for unit-based compensation vesting	(6.9)	(3.6)
Other	(0.1)	(0.1)
Net cash provided by (used in) financing activities	(60.3)	(47.1)
Net change in cash	4.8	0.7
Cash at beginning of period	1.3	1.6
Cash at end of period	6.1	2.3
Supplemental schedule of noncash investing and financing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	6	(6.9)
Crestwood Midstream Partners LP
Operating activities
Net income (loss)	8.9	(23.3)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	95.2	102.6
Amortization of debt-related deferred costs	3.6	3.5
Unit-based compensation charges	17.5	12.7
Gain on long-lived assets, net	24.1	0
Loss on modification/extinguishment of debt	0	37.7
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	(0.2)	0.5
Deferred income taxes	(0.1)	0
Other	0.2	(0.4)
Changes in operating assets and liabilities	15.2	2.8
Net cash provided by operating activities	164.4	136.1
Investing activities
Purchases of property, plant and equipment	(118.7)	(88.7)
Investment in unconsolidated affiliates	(6.9)	(18.5)
Capital distributions from unconsolidated affiliates	23.9	21.1
Net proceeds from sale of assets	6.8	1
Net cash used in investing activities	(94.9)	(85.1)
Financing activities
Proceeds from the issuance of long-term debt	847.1	1,680.4
Payments on long-term debt	(781)	(1,630.3)
Payments on capital leases	(0.7)	(1.3)
Payments for debt-related deferred costs	0	(1)
Distributions to partners	(123.3)	(94.5)
Taxes paid for unit-based compensation vesting	(6.9)	(3.6)
Net cash provided by (used in) financing activities	(64.8)	(50.3)
Net change in cash	4.7	0.7
Cash at beginning of period	1	1.3
Cash at end of period	5.7	2
Supplemental schedule of noncash investing and financing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	$ 6	$ (6.9)

Organization and Business Descr

Organization and Business Description	6 Months Ended
	Jun. 30, 2018
Disclosure Partnership Organization And Basis Of Presentation Narrative [Abstract]
Organization and Business Description	Organization and Business Description Organization The accompanying notes to the consolidated financial statements apply to Crestwood Equity Partners LP and Crestwood Midstream Partners LP, unless otherwise indicated. References in this report to “we,” “us,” “our,” “ours,” “our company,” the “partnership,” the “Company,” “Crestwood Equity,” “CEQP,” and similar terms refer to either Crestwood Equity Partners LP itself or Crestwood Equity Partners LP and its consolidated subsidiaries, as the context requires. Unless otherwise indicated, references to “Crestwood Midstream” and “CMLP” refer to Crestwood Midstream Partners LP and its consolidated subsidiaries. The accompanying consolidated financial statements and related notes should be read in conjunction with our 2017 Annual Report on Form 10-K filed with the Securities and Exchange Commission (SEC) on February 26, 2018. The financial information as of June 30, 2018 , and for the three and six months ended June 30, 2018 and 2017 , is unaudited. The consolidated balance sheets as of December 31, 2017 , were derived from the audited balance sheets filed in our 2017 Annual Report on Form 10-K. Business Description Crestwood Equity is a publicly-traded (NYSE: CEQP) Delaware limited partnership that develops, acquires, owns or controls, and operates primarily fee-based assets and operations within the energy midstream sector. We provide broad-ranging infrastructure solutions across the value chain to service premier liquids-rich natural gas and crude oil shale plays across the United States. We own and operate a diversified portfolio of crude oil and natural gas gathering, processing, storage and transportation assets that connect fundamental energy supply with energy demand across North America. Crestwood Equity is a holding company and all of its consolidated operating assets are owned by or through its wholly-owned subsidiary, Crestwood Midstream, a Delaware limited partnership.

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation Our consolidated financial statements are prepared in accordance with Generally Accepted Accounting Principles (GAAP) and include the accounts of all consolidated subsidiaries after the elimination of all intercompany accounts and transactions. Certain amounts in prior periods have been reclassified to conform to the current year presentation, none of which impacted our previously reported net income, earnings per unit or partners’ capital. In management’s opinion, all necessary adjustments to fairly present our results of operations, financial position and cash flows for the periods presented have been made and all such adjustments are of a normal and recurring nature. Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with GAAP have been omitted pursuant to the rules and regulations of the SEC. Significant Accounting Policies Effective January 1, 2018, we adopted the following accounting standards. There were no other material changes in our significant accounting policies from those described in our 2017 Annual Report on Form10-K. Revenue Recognition We provide gathering, processing, compression, storage, fractionation, and transportation (consisting of pipelines, truck and rail terminals, truck/trailer units and rail cars) services and we sell commodities (including crude oil, natural gas, NGLs and water) under various contracts. These contracts include: • Fixed-fee contracts . Under these contracts, we do not take title to the underlying crude oil, natural gas or NGLs but charge our customers a fixed-fee for the services we provide, which can be a firm reservation charge and/or a charge per volume gathered, processed, compressed, stored, loaded and/or transported (which, in certain contracts, can be subject to a minimum level of volumes); • Percentage-of-proceeds service contracts . Under these contracts, we take title to crude oil, natural gas or NGLs after the commodity leaves our gathering and processing facilities. We often market and sell those commodities to third parties after they leave our facilities and we will remit a portion of the sales proceeds to our producers; • Percentage-of-proceeds product contracts. Under these contracts, we take title to crude oil, natural gas or NGLs before the commodity enters our facilities. We market and sell those commodities to third parties and we will remit a portion of the sales proceeds to our producers; and • Purchase and sale contracts . Under these contracts, we purchase crude oil, natural gas or NGLs before the commodity enters our facilities, and we market and sell those commodities to third parties. On January 1, 2018, we adopted the provisions of Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606) , which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. We adopted the standard using the modified retrospective method for all revenue contracts that involve revenue generating activities that occur after January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under the new standard, while amounts prior to January 1, 2018 continue to be reported in accordance with our historic accounting under Revenue Recognition (Topic 605) . Prior to January 1, 2018, we recognized revenues for services and products when all of the following criteria were met under Topic 605 : (i) services had been rendered or products delivered or sold; (ii) persuasive evidence of an exchange arrangement existed; (iii) the price for services was fixed or determinable; and (iv) collectability was reasonably assured. We recorded deferred revenue when we received amounts from our customers but had not yet met the criteria listed above. We recognized deferred revenue in our consolidated statement of operations when the criteria had been met and all services had been rendered. At December 31, 2017, we had deferred revenue of approximately $0.6 million , which is reflected in accrued expenses and other liabilities on our consolidated balance sheet. Beginning January 1, 2018, we recognize revenues for services and products under revenue contracts as our obligations to perform services or deliver/sell products under the contracts are satisfied. A contract’s transaction price is allocated to each performance obligation in the contract and recognized as revenue when, or as, the performance obligation is satisfied. Our fixed-fee contracts and our percentage-of-proceeds service contracts primarily have a single performance obligation to deliver a series of distinct goods or services that are substantially the same and have the same pattern of transfer to our customers. For performance obligations associated with these contracts, we recognize revenues over time utilizing the output method based on the actual volumes of products delivered/sold or services performed, because the single performance obligation is satisfied over time using the same performance measure of progress toward satisfaction of the performance obligation . The transaction price under certain of our fixed-price contracts and percentage-of-proceeds service contracts includes variable consideration that varies primarily based on actual volumes that are delivered under the contracts. Because the variable consideration specifically relates to our efforts to transfer the services and/or products under the contracts, we allocate the variable consideration entirely to the distinct service utilizing the allocation exception guidance under Topic 606 , and accordingly recognize the variable consideration as revenues at the time the good or service is transferred to the customer. Certain of our fixed-fee contracts contain minimum volume features under which the customers must utilize our services to gather, compress or load a specified quantity of crude oil or natural gas or pay a deficiency fee based on the difference between actual volumes and the contractual minimum volume. We recognize revenues from these contracts when actual volumes are gathered, compressed or loaded and the likelihood of a customer exercising its remaining rights to make up the deficient volumes under minimum volume commitments becomes remote. We recognize revenues at a point in time for performance obligations associated with our percentage-of proceeds product contracts and purchase and sale contracts, and these revenues are recognized because control of the underlying product is transferred to the customer when the distinct good is provided to the customer. The evaluation of when performance obligations have been satisfied and the transaction price that is allocated to our performance obligations requires significant judgment and assumptions, including our evaluation of the timing of when control of the underlying good or service has transferred to our customers and the relative standalone selling price of goods and services provided to customers under contracts with multiple performance obligations. Actual results can significantly vary from those judgments and assumptions. We did not have any material contracts with multiple performance obligations or under which we receive material amounts of non-cash consideration during the six months ended June 30, 2018. The following table summarizes the transaction price allocated to our remaining performance obligations under certain contracts that have not been recognized as of June 30, 2018 (in millions) : Remainder of 2018 $ 32.9 2019 25.4 2020 20.7 2021 8.7 2022 7.3 Thereafter 10.5 Total $ 105.5 Our remaining performance obligations presented in the table above exclude estimates of variable rate escalation clauses in our contracts with customers, and is generally limited to fixed-fee and percentage-of-proceeds service contracts which have fixed pricing and minimum volume terms and conditions. Our remaining performance obligations generally exclude, based on the following practical expedients that we elected to apply, disclosures for (i) variable consideration allocated to a wholly-unsatisfied promise to transfer a distinct service that forms part of the identified single performance obligation; (ii) unsatisfied performance obligations where the contract term is one year or less; and (iii) contracts for which we recognize revenues as amounts are invoiced. Contract Assets and Contract Liabilities . Amounts due from our customers under our revenue contracts are typically billed as the service is being provided or on a weekly, bi-weekly or monthly basis and are due within 30 days of billing. Under certain of our contracts, we recognize revenues in excess of billings which we present as contract assets on our consolidated balance sheets. Under certain contracts, we may be entitled to receive payments in advance of satisfying our performance obligations under the contract. We recognize a liability for these payments in excess of revenue recognized and present it as deferred revenue or contract liabilities on our consolidated balance sheets. Our deferred revenue primarily relates to: • Capital Reimbursements. Certain contracts in our G&P segment require that our customers reimburse us for capital expenditures related to the construction of long-lived assets utilized to provide services to them under the revenue contracts. Because we consider these amounts as consideration from customers associated with ongoing services to be provided to customers, we defer these upfront payments in deferred revenue and recognize the amounts in revenue over the life of the associated revenue contract as the performance obligations are satisfied under the contract. On January 1, 2018, we recorded an $87.6 million increase to our property, plant and equipment, net, a $69.1 million increase to our deferred revenue liability and an $18.5 million increase to partners’ capital as a result of applying the cumulative impact of adopting the new standard on these types of contracts. • Contracts with Increasing (Decreasing) Rates per Unit. Certain contracts in our G&P, S&T and MS&L segments have fixed rates per volume that increase and/or decrease over the life of the contract once certain time periods or thresholds are met. We record revenues on these contracts ratably per unit over the life of the contract based on the remaining performance obligations to be performed, which can result in the deferral of revenue for the difference between the consideration received and the ratable revenue recognized. On January 1, 2018, we recorded a $1.5 million increase to our deferred revenue liability and a corresponding decrease to partners’ capital as a result of applying the cumulative impact of adopting the new standard on these types of contracts. Our contract assets and contract liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. Our receivables related to our Topic 606 revenue contracts totaled $312.4 million for both CEQP and CMLP at June 30, 2018, and are included in accounts receivable on our consolidated balance sheet. Our contract assets are included in other non-current assets on our consolidated balance sheet. The majority of our deferred revenues are included in other long-term liabilities on our consolidated balance sheet and are classified as non-current, for which the majority of revenue is expected to be recognized as the performance obligations under the related revenue contracts are satisfied over the next 14 years . The following table summarizes the opening and closing balances of our contract assets and contract liabilities (in millions) : Balance at January 1, 2018 Balance at June 30, 2018 Contract Assets (Non-current) $ 1.1 $ 1.0 Contract Liabilities (Current) (1) 12.2 12.4 Contract Liabilities (Non-current) (2) 60.6 62.9 (1) Our current contract liabilities primarily consist of current deferred revenues and are included in accrued expenses and other liabilities on our consolidated balance sheets. During the three and six months ended June 30, 2018, we recognized revenues of approximately $3.1 million and $6.2 million that were previously included in deferred revenues (current) at January 1, 2018. (2) Our non-current contract liabilities primarily consist of non-current deferred revenues and are included in other long-term liabilities on our consolidated balance sheets. Impact of financial statement line items . For contracts that were modified prior to January 1, 2018, we have not retrospectively restated the contract for those modifications and instead we have reflected the aggregate effect of those modifications when identifying satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price to satisfied and unsatisfied obligations. The impact of applying this transition practical expedient was not material to our financial statements. The adoption of Topic 606 had the following impact on CEQP’s and CMLP’s consolidated income statements and balance sheets (in millions) : Crestwood Equity Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Income Statement Product revenues: Gathering and processing (1) $ 186.9 $ 437.3 $ (250.4 ) $ 459.1 $ 866.9 $ (407.8 ) Service revenues: Gathering and processing (1)(2) 68.5 78.4 (9.9 ) 136.6 157.9 (21.3 ) Marketing, supply and logistics (3) 17.0 16.8 0.2 33.8 33.3 0.5 Costs of product/services sold: Product costs (1) 681.8 945.0 (263.2 ) 1,620.7 2,055.5 (434.8 ) Depreciation, amortization and accretion (2) 44.5 43.3 1.2 89.6 87.1 2.5 Earnings from unconsolidated affiliates, net (4) 12.0 15.0 (3.0 ) 24.4 29.4 (5.0 ) Net income (loss) (21.5 ) (20.4 ) (1.1 ) 12.6 13.9 (1.3 ) June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,409.8 $ 2,300.5 $ 109.3 Accumulated depreciation and depletion (2) 518.1 503.4 14.7 Investments in unconsolidated affiliates (4) 1,156.7 1,171.2 (14.5 ) Liabilities: Accrued expenses and other liabilities (2)(3) 85.2 73.5 11.7 Other long-term liabilities (2)(3) 166.2 104.0 62.2 Partners’ capital: Crestwood Equity Partners LP partners’ capital (2)(3)(4) 1,300.3 1,294.1 6.2 Crestwood Midstream Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Income Statement Product revenues: Gathering and processing (1) $ 186.9 $ 437.3 $ (250.4 ) $ 459.1 $ 866.9 $ (407.8 ) Service revenues: Gathering and processing (1)(2) 68.5 78.4 (9.9 ) 136.6 157.9 (21.3 ) Marketing, supply and logistics (3) 17.0 16.8 0.2 33.8 33.3 0.5 Costs of product/services sold: Product costs (1) 681.8 945.0 (263.2 ) 1,620.7 2,055.5 (434.8 ) Depreciation, amortization and accretion (2) 47.4 46.2 1.2 95.2 92.7 2.5 Earnings from unconsolidated affiliates, net (4) 12.0 15.0 (3.0 ) 24.4 29.4 (5.0 ) Net income (loss) (23.5 ) (22.4 ) (1.1 ) 8.9 10.2 (1.3 ) June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,739.9 $ 2,630.6 $ 109.3 Accumulated depreciation and depletion (2) 668.6 653.9 14.7 Investments in unconsolidated affiliates (4) 1,156.7 1,171.2 (14.5 ) Liabilities: Accrued expenses and other liabilities (2)(3) 84.2 72.5 11.7 Other long-term liabilities (2)(3) 163.7 101.5 62.2 Partners’ capital (2)(3)(4) 2,094.6 2,088.4 6.2 (1) On January 1, 2018, we began classifying product and service revenues as a reduction of costs of product sold on certain of our gathering and processing contracts where we do not obtain control of the customers’ product prior to it entering our facilities. (2) On January 1, 2018, we began recording proceeds received from customers for reimbursable construction as deferred revenue instead of as reductions of property, plant and equipment. (3) For contracts that have fixed rates per volume that increase and/or decrease over the life of the contract once certain time periods or thresholds have been met, on January 1, 2018, we began recording revenues on those contracts ratably per unit over the life of the contract based on the remaining performance obligations to be performed. (4) On January 1, 2018, Jackalope Gas Gathering Services, L.L.C. (Jackalope) adopted the provisions of Topic 606 , and we recorded a $9.5 million decrease to our equity method investment and a corresponding decrease to our partners’ capital to reflect our proportionate share of the cumulative effect of accounting change recorded by the equity investment related to the new standard. In addition, our earnings from unconsolidated affiliates decreased by approximately $3.0 million and $5.0 million during the three and six months ended June 30, 2018 to reflect our proportionate share of the ongoing impact of the new standard on Jackalope’s revenues. The adoption of Topic 606 was not material to our other equity method investments. Cash Flows Effective January 1, 2018, we adopted the provisions of ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, which clarifies how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The adoption of this accounting standard did not have a material impact on our consolidated financial statements. New Accounting Pronouncements Issued But Not Yet Adopted As of June 30, 2018 , the following accounting standard had not yet been adopted by us: In February 2016, the Financial Accounting Standards Board issued ASU 2016-02, Leases (Topic 842) , which revises the accounting for leases by requiring certain leases to be recognized as assets and liabilities on the balance sheet, and requiring companies to disclose additional information about their leasing arrangements. Companies are required to adopt the provisions of the standard using the modified retrospective transition method. We expect to adopt the provisions of this standard effective January 1, 2019. We are in the process of implementing appropriate changes to our processes, systems and controls to support the accounting and disclosure requirements of the new standard and are currently evaluating the impact that this standard will have on our consolidated financial statements.

Assets Held for Sale

Assets Held for Sale	6 Months Ended
	Jun. 30, 2018
Assets Held for Sale [Abstract]
Disclosure of Long Lived Assets Held-for-sale	Assets Held for Sale In June 2018, we entered into an agreement with a third-party to sell our West Coast facilities included in our Marketing, Supply and Logistics segment, which are further described in our 2017 Annual Report on Form 10-K. We recorded a $54.0 million current asset held for sale at June 30, 2018 related to the fair value of the facilities to be sold, which is a Level 3 fair value measurement based on the sales price plus working capital adjustments in the sales agreement. We recorded a loss on long-lived assets of approximately $24.5 million (including the goodwill impairment discussed further below) during the three months ended June 30, 2018 based on the difference between the carrying value of West Coast’s current assets and liabilities, goodwill and its $61.6 million of property, plant and equipment, net and the fair value of the assets held for sale at June 30, 2018. The sale is contingent upon customary approvals and satisfaction of certain other closing conditions, which we believe is probable at June 30, 2018. We expect to close the sale during the third quarter of 2018. Our Marketing, Supply and Logistics segment had approximately $101.7 million of goodwill associated with it at December 31, 2017 . On January 1, 2018, we combined four of the reporting units included in the Marketing, Supply and Logistics segment into one NGL Marketing and Logistics reporting unit for the purpose of evaluating goodwill for impairment on an ongoing basis. We combined these reporting units based on a strategic shift in the way in which we manage, operate and report our NGL operations as an integrated platform instead of as four individual stand-alone operations. As a result, we attributed approximately $9.0 million of the goodwill associated with our NGL Marketing and Logistics reporting unit to our West Coast facilities to be sold as of June 30, 2018 , and this goodwill was fully impaired in conjunction with the reclassification of the West Coast net assets to assets held for sale during the three months ended June 30, 2018 .

Certain Balance Sheet Informati

Certain Balance Sheet Information	6 Months Ended
	Jun. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Certain Balance Sheet Information	Certain Balance Sheet Information Accrued Expenses and Other Liabilities Accrued expenses and other liabilities consisted of the following ( in millions ): CEQP CMLP June 30, December 31, June 30, December 31, 2018 2017 2018 2017 Accrued expenses $ 35.7 $ 56.6 $ 34.7 $ 55.5 Accrued property taxes 6.0 4.8 6.0 4.8 Income tax payable 0.2 0.3 0.2 0.3 Interest payable 20.5 20.3 20.5 20.3 Accrued additions to property, plant and equipment 9.2 22.3 9.2 22.2 Capital leases 1.2 1.0 1.2 1.0 Deferred revenue 12.4 0.6 12.4 0.6 Total accrued expenses and other liabilities $ 85.2 $ 105.9 $ 84.2 $ 104.7

Investments in Unconsolidated A

Investments in Unconsolidated Affiliates	6 Months Ended
	Jun. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Investments in Unconsolidated Affiliates	Investments in Unconsolidated Affiliates Variable Interest Entity Crestwood Permian Basin Holdings LLC (Crestwood Permian) is a joint venture owned by Crestwood Infrastructure Holdings LLC (Crestwood Infrastructure), our wholly-owned subsidiary, and an affiliate of First Reserve Management, L.P. (First Reserve). We manage and account for our 50% ownership interest in Crestwood Permian, which is a variable interest entity, under the equity method of accounting as we exercise significant influence, but do not control Crestwood Permian and we are not its primary beneficiary due to First Reserve’s rights to exercise control over the entity. Net Investments and Earnings Our net investments in and earnings from our unconsolidated affiliates are as follows ( in millions ): Investment Earnings (Loss) from Unconsolidated Affiliates June 30, December 31, Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 2018 2017 Stagecoach Gas Services LLC (1) $ 840.0 $ 849.8 $ 7.0 $ 6.6 $ 12.7 $ 12.6 Jackalope Gas Gathering Services, L.L.C. (2)(6) 174.0 184.9 3.8 2.2 6.8 4.0 Crestwood Permian Basin Holdings LLC (3) 97.2 102.0 0.7 (0.4 ) 3.4 (0.6 ) Tres Palacios Holdings LLC (4) 36.8 37.8 — 0.7 0.4 1.2 Powder River Basin Industrial Complex, LLC (5) 8.7 8.5 0.5 0.5 1.1 0.5 Total $ 1,156.7 $ 1,183.0 $ 12.0 $ 9.6 $ 24.4 $ 17.7 (1) As of June 30, 2018 , our equity in the underlying net assets of Stagecoach Gas exceeded our investment balance by approximately $51.4 million . This excess amount is entirely attributable to goodwill and, as such, is not subject to amortization. Our Stagecoach Gas investment is included in our storage and transportation segment. (2) As of June 30, 2018 , our equity in the underlying net assets of Jackalope exceeded our investment balance by approximately $0.7 million . We amortize this amount over the life of Jackalope’s gathering agreement with Chesapeake Energy Corporation (Chesapeake), and we reflect the amortization as an increase in our earnings from unconsolidated affiliates. Our Jackalope investment is included in our gathering and processing segment. (3) In June 2017, we contributed to Crestwood Permian 100% of the equity interest of Crestwood New Mexico Pipeline LLC (Crestwood New Mexico). This contribution was treated as a transaction between entities under common control (because of our relationship with First Reserve) and the accounting standards related to such transactions required Crestwood Permian to record the assets and liabilities of Crestwood New Mexico at our historical book value. The difference between our equity in Crestwood Permian’s net assets and our investment balance is not subject to amortization. Our Crestwood Permian investment is included in our gathering and processing segment. (4) As of June 30, 2018 , our equity in the underlying net assets of Tres Palacios Holdings LLC (Tres Holdings) exceeded our investment balance by approximately $25.9 million . We amortize this amount over the life of the Tres Palacios Gas Storage LLC sublease agreement, and we reflect the amortization as an increase in our earnings from unconsolidated affiliates. Our Tres Holdings investment is included in our storage and transportation segment. (5) As of June 30, 2018 , our equity in the underlying net assets of Powder River Basin Industrial Complex, LLC (PRBIC) exceeded our investment balance by approximately $6.1 million . We amortize this amount over the life of PRBIC’s property, plant and equipment and its agreement with Chesapeake, and we reflect the amortization as an increase in our earnings from unconsolidated affiliates. Our PRBIC investment is included in our storage and transportation segment. (6) On January 1, 2018, Jackalope adopted the provisions of Topic 606 , and we recorded a $9.5 million decrease to our equity method investment and a corresponding decrease to our partners’ capital to reflect our proportionate share of the cumulative effect of accounting change recorded by the equity investment related to the new standard. In addition, our earnings from unconsolidated affiliates decreased by approximately $3.0 million and $5.0 million during the three and six months ended June 30, 2018 to reflect our proportionate share of Jackalope’s deferred revenues related to the new standard. Summarized Financial Information of Unconsolidated Affiliates Below is the summarized operating results for our significant unconsolidated affiliates ( in millions; amounts represent 100% of unconsolidated affiliate information ): Six Months Ended June 30, 2018 2017 Operating Revenues Operating Expenses Net Income Operating Revenues Operating Expenses Net Income Stagecoach Gas $ 85.5 $ 39.9 $ 45.6 $ 84.0 $ 38.0 $ 46.1 Other (1) 92.9 76.8 18.9 76.5 63.3 13.1 Total $ 178.4 $ 116.7 $ 64.5 $ 160.5 $ 101.3 $ 59.2 (1) Includes our Jackalope, Crestwood Permian, Tres Holdings and PRBIC equity investments. We amortize the excess basis in certain of our equity investments as an increase in our earnings from unconsolidated affiliates. We recorded amortization of the excess basis in our Jackalope equity investment of less than $0.1 million for both the six months ended June 30, 2018 and 2017 . We recorded amortization of the excess basis in our Tres Holdings equity investment of approximately $0.6 million for both the six months ended June 30, 2018 and 2017 . We recorded amortization of the excess basis in our PRBIC equity investment of approximately $0.3 million for both the six months ended June 30, 2018 and 2017 . Distributions and Contributions The following table summarizes our distributions and contributions from our unconsolidated affiliates (in millions) : Distributions (1) Contributions Six Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Stagecoach Gas $ 22.5 $ 23.7 $ — $ — Jackalope 15.0 12.3 6.8 1.5 Crestwood Permian (2) 8.3 — 0.1 86.4 Tres Holdings 1.4 2.7 — — PRBIC 0.9 0.6 — — Total $ 48.1 $ 39.3 $ 6.9 $ 87.9 (1) In July 2018, we received cash distributions from Stagecoach Gas, Crestwood Permian, Tres Holdings and PRBIC of approximately $12.2 million , $2.3 million , $2.5 million and $0.5 million , respectively. In July 2018, we made a cash contribution of approximately $2.5 million to Tres Holdings. (2) On June 21, 2017, we contributed to Crestwood Permian 100% of the equity interest of Crestwood New Mexico at our historical book value of approximately $69.4 million . This contribution was treated as a non-cash transaction between entities under common control. Other Contingent Consideration . Pursuant to the Stagecoach Gas limited liability company agreement, we may be required to make payments of up to $57 million to Con Edison Gas Pipeline and Storage Northeast, LLC after December 31, 2020 if certain criteria are not met by Stagecoach Gas by December 31, 2020, including achieving certain performance targets on growth capital projects. These growth capital projects depend on the construction of other third-party expansion projects, and those third-party projects have experienced regulatory and other delays that have caused Stagecoach Gas to delay its growth capital projects. Although Stagecoach Gas anticipates that these growth capital projects will be constructed in the future, it does not expect that these projects will produce meaningful operating results prior to December 31, 2020. As a result, at June 30, 2018 and December 31, 2017 , we have recorded a liability of $57 million for this obligation, which in reflected in other long-term liabilities on our consolidated balance sheets. Guarantee. Crestwood Permian owns a 50% equity interest in Crestwood Permian Basin LLC (Crestwood Permian Basin) and Shell Midstream Partners L.P. (Shell Midstream), a subsidiary of Royal Dutch Shell plc, owns the remaining 50% equity interest in Crestwood Permian Basin. Crestwood Permian Basin owns the Nautilus gathering system. CEQP issued a guarantee in conjunction with the Crestwood Permian Basin gas gathering agreement with SWEPI LP, a subsidiary of Royal Dutch Shell plc, under which CEQP has agreed to fund 100% of the costs to build the Nautilus gathering system (which is currently estimated to cost $180 million , of which approximately $112.3 million has been spent through June 30, 2018) if Crestwood Permian fails to do so. We do not believe this guarantee is probable of resulting in future losses based on our assessment of the nature of the guarantee, the financial condition of the guaranteed party and the period of time that the guarantee has been outstanding, and as a result, we have not recorded a liability on our consolidated balance sheets at June 30, 2018 and December 31, 2017 .

Risk Management

Risk Management	6 Months Ended
	Jun. 30, 2018
Risk Management - Notional Amounts and Terms of Companys Derivative Financial Instruments [Abstract]
Risk Management	Risk Management We are exposed to certain market risks related to our ongoing business operations. These risks include exposure to changing commodity prices. We utilize derivative instruments to manage our exposure to fluctuations in commodity prices, which is discussed below. Additional information related to our derivatives is discussed in Note 7 . Commodity Derivative Instruments and Price Risk Management Risk Management Activities We sell NGLs and crude oil to energy related businesses and may use a variety of financial and other instruments including forward contracts involving physical delivery of NGLs, heating oil and crude oil. We periodically enter into offsetting positions to economically hedge against the exposure our customer contracts create. Certain of these contracts and positions are derivative instruments. We do not designate any of our commodity-based derivatives as hedging instruments for accounting purposes. Our commodity-based derivatives are reflected at fair value in the consolidated balance sheets, and changes in the fair value of these derivatives that impact the consolidated statements of operations are reflected in costs of product/services sold. Our commodity-based derivatives that are settled with physical commodity are reflected as an increase to product revenues, and the commodity inventory that is utilized to satisfy those physical obligations is reflected as an increase to cost of product sold in our consolidated statements of operations. During the three and six months ended June 30, 2018 , the impact to our consolidated statements of operations related to our commodity-based derivatives reflected in costs of product/services sold was a loss of $6.4 million and a gain of $1.4 million , and reflected in operating revenues was a $33.0 million and $130.8 million increase in product revenues. During the three and six months ended June 30, 2017 , the impact to our consolidated statements of operations related to our commodity-based derivatives reflected in costs of product/services sold was a gain of $6.9 million and $1.5 million , and reflected in operating revenues was a $28.0 million and $73.1 million increase in product revenues. We attempt to balance our contractual portfolio in terms of notional amounts and timing of performance and delivery obligations. This balance in the contractual portfolio significantly reduces the volatility in costs of product/services sold related to these instruments. Commodity Price and Credit Risk Notional Amounts and Terms The notional amounts and terms of our derivative financial instruments include the following: June 30, 2018 December 31, 2017 Fixed Price Payor Fixed Price Receiver Fixed Price Payor Fixed Price Receiver Propane, crude and heating oil (MMBbls) 11.6 13.8 15.3 17.5 Natural gas (MMcf) 870 820 780 660 Notional amounts reflect the volume of transactions, but do not represent the amounts exchanged by the parties to the financial instruments. Accordingly, notional amounts do not reflect our monetary exposure to market or credit risks. All contracts subject to price risk had a maturity of 36 months or less; however, 91% of the contracted volumes will be delivered or settled within 12 months . Credit Risk Inherent in our contractual portfolio are certain credit risks. Credit risk is the risk of loss from nonperformance by suppliers, customers or financial counterparties to a contract. We take an active role in managing credit risk and have established control procedures, which are reviewed on an ongoing basis. We attempt to minimize credit risk exposure through credit policies and periodic monitoring procedures as well as through customer deposits, letters of credit and entering into netting agreements that allow for offsetting counterparty receivable and payable balances for certain financial transactions, as deemed appropriate. The counterparties associated with our price risk management activities are energy marketers and propane retailers, resellers and dealers. Certain of our derivative instruments have credit limits that require us to post collateral. The amount of collateral required to be posted is a function of the net liability position of the derivative as well as our established credit limit with the respective counterparty. If our credit rating were to change, the counterparties could require us to post additional collateral. The amount of additional collateral that would be required to be posted would vary depending on the extent of change in our credit rating as well as the requirements of the individual counterparty. The aggregate fair value of all commodity derivative instruments with credit-risk-related contingent features that were in a liability position at June 30, 2018 and December 31, 2017 was $13.5 million and $28.9 million . At both June 30, 2018 and December 31, 2017 , we posted less than $0.1 million of collateral for our commodity derivative instruments with credit-risk-related contingent features. In addition, we have margin requirements with a New York Mercantile Exchange (NYMEX) broker related to our net asset or liability position with such broker. At June 30, 2018 and December 31, 2017 , we had a NYMEX related net derivative asset position of $24.8 million and $27.2 million , for which we posted $4.9 million and $5.6 million of cash collateral in the normal course of business. At June 30, 2018 and December 31, 2017 , we also received collateral of $2.4 million and $3.7 million in the normal course of business. All collateral amounts have been netted against the asset or liability with the respective counterparty and are reflected in our consolidated balance sheets as assets and liabilities from price risk management activities.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2018
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Fair Value Measurements	Fair Value Measurements The accounting standard for fair value measurement establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The three levels of the fair value hierarchy are as follows: • Level 1—Quoted prices are available in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. Level 1 primarily consists of financial instruments such as exchange-traded derivatives, listed equities and US government treasury securities. • Level 2—Pricing inputs are other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date. Level 2 includes those financial instruments that are valued using models or other valuation methodologies. These models are primarily industry-standard models that consider various assumptions, including quoted forward prices for commodities, time value, volatility factors, and current market and contractual prices for the underlying instruments, as well as other relevant economic measures. Substantially all of these assumptions are observable in the marketplace throughout the full term of the instrument, can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace. Instruments in this category include non-exchange-traded derivatives such as over the counter (OTC) forwards, options and physical exchanges. • Level 3—Pricing inputs include significant inputs that are generally less observable from objective sources. These inputs may be used with internally developed methodologies that result in management’s best estimate of fair value. Cash, Accounts Receivable and Accounts Payable As of June 30, 2018 and December 31, 2017 , the carrying amounts of cash, accounts receivable and accounts payable approximate fair value based on the short-term nature of these instruments. Credit Facility The fair value of the amounts outstanding under our CMLP credit facility approximates the carrying amounts as of June 30, 2018 and December 31, 2017 , due primarily to the variable nature of the interest rate of the instrument, which is considered a Level 2 fair value measurement. Senior Notes We estimate the fair value of our senior notes primarily based on quoted market prices for the same or similar issuances (representing a Level 2 fair value measurement). The following table reflects the carrying amount (reduced for deferred financing costs associated with the respective notes) and fair value of our senior notes ( in millions ): June 30, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value 2023 Senior Notes $ 692.9 $ 713.8 $ 692.1 $ 728.8 2025 Senior Notes $ 492.8 $ 500.4 $ 492.3 $ 517.9 Financial Assets and Liabilities As of June 30, 2018 and December 31, 2017 , we held certain assets and liabilities that are required to be measured at fair value on a recurring basis, which include our derivative instruments related to heating oil, crude oil, and NGLs. Our derivative instruments consist of forwards, swaps, futures, physical exchanges and options. Our derivative instruments that are traded on the NYMEX have been categorized as Level 1. Our derivative instruments also include OTC contracts, which are not traded on a public exchange. The fair values of these derivative instruments are determined based on inputs that are readily available in public markets or can be derived from information available in publicly quoted markets. These instruments have been categorized as Level 2. Our OTC options are valued based on the Black Scholes option pricing model that considers time value and volatility of the underlying commodity. The inputs utilized in the model are based on publicly available information as well as broker quotes. These options have been categorized as Level 2. Our financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels. The following tables set forth by level within the fair value hierarchy, our financial instruments that were accounted for at fair value on a recurring basis at June 30, 2018 and December 31, 2017 ( in millions ): June 30, 2018 Level 1 Level 2 Level 3 Gross Fair Value Contract Netting (1) Collateral/Margin Received or Paid Fair Value Assets Assets from price risk management $ 5.1 $ 71.2 $ — $ 76.3 $ (50.2 ) $ (20.1 ) $ 6.0 Suburban Propane Partners, L.P. units (2) 3.4 — — 3.4 — — 3.4 Total assets at fair value $ 8.5 $ 71.2 $ — $ 79.7 $ (50.2 ) $ (20.1 ) $ 9.4 Liabilities Liabilities from price risk management $ 5.8 $ 65.3 $ — $ 71.1 $ (50.2 ) $ 2.1 $ 23.0 Total liabilities at fair value $ 5.8 $ 65.3 $ — $ 71.1 $ (50.2 ) $ 2.1 $ 23.0 December 31, 2017 Level 1 Level 2 Level 3 Gross Fair Value Contract Netting (1) Collateral/Margin Received or Paid Fair Value Assets Assets from price risk management $ 1.1 $ 102.2 $ — $ 103.3 $ (74.6 ) $ (21.5 ) $ 7.2 Suburban Propane Partners, L.P. units (2) 3.5 — — 3.5 — — 3.5 Total assets at fair value $ 4.6 $ 102.2 $ — $ 106.8 $ (74.6 ) $ (21.5 ) $ 10.7 Liabilities Liabilities from price risk management $ 1.4 $ 118.2 $ — $ 119.6 $ (74.6 ) $ 3.9 $ 48.9 Total liabilities at fair value $ 1.4 $ 118.2 $ — $ 119.6 $ (74.6 ) $ 3.9 $ 48.9 (1) Amounts represent the impact of legally enforceable master netting agreements that allow us to settle positive and negative positions as well as cash collateral held or placed with the same counterparties. (2) Amount is reflected in other assets on CEQP’s consolidated balance sheets.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2018
Text Block [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt consisted of the following at June 30, 2018 and December 31, 2017 ( in millions ): June 30, December 31, Credit Facility $ 385.0 $ 318.2 2023 Senior Notes 700.0 700.0 2025 Senior Notes 500.0 500.0 Other 1.7 2.4 Less: deferred financing costs, net 24.8 28.4 Total debt 1,561.9 1,492.2 Less: current portion 0.9 0.9 Total long-term debt, less current portion $ 1,561.0 $ 1,491.3 Credit Facility At June 30, 2018 , Crestwood Midstream had $582.1 million of available capacity under its credit facility considering the most restrictive debt covenants in its credit agreement. At June 30, 2018 and December 31, 2017 , Crestwood Midstream’s outstanding standby letters of credit were $55.5 million and $52.2 million . Borrowings under the credit facility accrue interest at prime or Eurodollar based rates plus applicable spreads, which resulted in interest rates between 4.26% and 6.25% at June 30, 2018 and 3.94% and 6.00% at December 31, 2017 . The weighted-average interest rate as of June 30, 2018 and December 31, 2017 was 4.33% and 4.11% . Crestwood Midstream is required under its credit agreement to maintain a net debt to consolidated EBITDA ratio (as defined in its credit agreement) of not more than 5.50 to 1.0, a consolidated EBITDA to consolidated interest expense ratio (as defined in its credit agreement) of not less than 2.50 to 1.0, and a senior secured leverage ratio (as defined in its credit agreement) of not more than 3.75 to 1.0. At June 30, 2018 , the net debt to consolidated EBITDA ratio was approximately 4.02 to 1.0, the consolidated EBITDA to consolidated interest expense ratio was approximately 4.37 to 1.0, and the senior secured leverage ratio was 0.98 to 1.0. The CMLP credit facility allows Crestwood Midstream to increase its available borrowings under the facility by $350.0 million , subject to lender approval and the satisfaction of certain other conditions, as described in the credit agreement. Senior Notes In March 2017, Crestwood Midstream issued $500 million of 5.75% unsecured senior notes due 2025 (the 2025 Senior Notes), which were registered with the SEC effective July 2017. The 2025 Senior Notes will mature on April 1, 2025, and interest is payable semiannually in arrears on April 1 and October 1 of each year, beginning October 1, 2017. The net proceeds from this offering of approximately $492 million were used to repay amounts outstanding under certain of Crestwood Midstream’s senior notes. During the three and six months ended June 30, 2017 , we recognized a loss on extinguishment of debt of approximately $0.4 million and $37.7 million in conjunction with the tender of principal amounts of certain of Crestwood Midstream’s senior notes. At June 30, 2018 , Crestwood Midstream was in compliance with all of its debt covenants applicable to its credit facility and senior notes.

Earnings Per Limited Partner Un

Earnings Per Limited Partner Unit	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Limited Partner Unit	Earnings Per Limited Partner Unit Our net income (loss) attributable to Crestwood Equity Partners is allocated to the subordinated and limited partner unitholders based on their ownership percentage after giving effect to net income attributable to the preferred units. We calculate basic net income per limited partner unit using the two-class method. Diluted net income per limited partner unit is computed using the treasury stock method, which considers the impact to net income attributable to Crestwood Equity Partners and limited partner units from the potential issuance of limited partner units. We exclude potentially dilutive securities from the determination of diluted earnings per unit (as well as their related income statement impacts) when their impact on net income attributable to Crestwood Equity Partners per limited partner unit is anti-dilutive. During the three and six months ended June 30, 2018 , we excluded a weighted-average of 7,125,744 common units in both periods (representing preferred units), a weighted-average of 5,946,194 and 5,916,641 common units (representing Crestwood Niobrara’s preferred units), a weighted average of 343,632 and 337,694 common units (representing performance units), and a weighted average of 438,789 common units in both periods (representing subordinated units). During the three and six months ended June 30, 2017 , we excluded a weighted-average of 6,964,663 and 6,887,247 common units (representing preferred units), a weighted-average of 8,228,378 common units in both periods (representing Crestwood Niobrara’s preferred units), a weighted average of 369,203 and 280,520 common units (representing performance units) and a weighted-average of 438,789 common units in both periods (representing subordinated units). See Note 10 for additional information regarding the potential conversion of our preferred units and Crestwood Niobrara’s preferred units to common units. For a description of our subordinated and performance units, see our 2017 Annual Report on Form 10-K.

Partners' Capital

Partners' Capital	6 Months Ended
	Jun. 30, 2018
Statement of Partners' Capital [Abstract]
Partners' Capital	Partners’ Capital Preferred Units Subject to certain conditions, the holders of the preferred units have the right to convert their preferred units into (i) common units on a 1-for-10 basis or (ii) a number of common units determined pursuant to a conversion ratio set forth in Crestwood Equity’s partnership agreement upon the occurrence of certain events, such as a change in control. The preferred units have voting rights that are identical to the voting rights of the common units and will vote with the common units as a single class, with each preferred unit entitled to one vote for each common unit into which such preferred unit is convertible, except that the preferred units are entitled to vote as a separate class on any matter on which all unitholders are entitled to vote that adversely affects the rights, powers, privileges or preferences of the preferred units in relation to Crestwood Equity’s other securities outstanding. Common Units On August 4, 2017, we entered into an equity distribution agreement with certain financial institutions (each, a Manager), under which we may offer and sell from time to time through one or more of the Managers, common units having an aggregate offering price of up to $250 million . Common units sold pursuant to this at-the-market (ATM) equity distribution program are issued under a registration statement that became effective on April 12, 2017. We are required to pay the Managers an aggregate fee of up to 2.0% of the gross sales price per common unit sold under our ATM equity distribution program. There were no units issued under our ATM equity distribution program during the six months ended June 30, 2018. Distributions Crestwood Equity Limited Partners. A summary of CEQP’s limited partner quarterly cash distributions for the six months ended June 30, 2018 and 2017 is presented below: Record Date Payment Date Per Unit Rate Cash Distributions ( in millions ) 2018 February 7, 2018 February 14, 2018 $ 0.60 $ 42.7 May 8, 2018 May 15, 2018 0.60 42.7 $ 85.4 2017 February 7, 2017 February 14, 2017 $ 0.60 $ 41.8 May 8, 2017 May 15, 2017 0.60 41.8 $ 83.6 On July 19, 2018 , we declared a distribution of $0.60 per limited partner unit to be paid on August 14, 2018 to unitholders of record on August 7, 2018 with respect to the second quarter of 2018 . Preferred Unit Holders . Beginning with the distribution for the quarter ended December 31, 2017, we are required to make quarterly cash distributions to our preferred unitholders. During the six months ended June 30, 2018 , we made cash distributions to our preferred unitholders of approximately $30.0 million . During the six months ended June 30, 2017 , we issued 3,113,215 Preferred Units to our preferred unitholders in lieu of paying cash distributions of $28.4 million . On July 19, 2018 , the board of directors of our general partner authorized a cash distribution to our preferred unitholders of approximately $15.0 million for the quarter ended June 30, 2018 . On April 24, 2018, Crestwood Equity filed a shelf registration statement with the SEC under which holders of the Preferred Units may sell their preferred units. The registration statement became effective on May 3, 2018. Crestwood Equity registered 71,257,445 preferred units under the registration statement. Crestwood Midstream During the six months ended June 30, 2018 and 2017 , Crestwood Midstream paid cash distributions of $120.0 million and $86.9 million to Crestwood Equity. Non-Controlling Partner Crestwood Niobrara issued a preferred interest (Series A Preferred Units) to a subsidiary of General Electric Capital Corporation and GE Structured Finance, Inc. (collectively, GE) in conjunction with the acquisition of its investment in Jackalope, which is reflected as non-controlling interest in our consolidated financial statements. In December 2017, Crestwood Niobrara redeemed 100% of the outstanding Series A Preferred Units from GE and issued new preferred interests (Series A-2 Preferred Units) to CN Jackalope Holdings LLC (Jackalope Holdings). Subject to certain restrictions, we have the ability to redeem the Series A-2 Preferred Units for an amount in cash for CEQP common units equal to an amount necessary for Jackalope Holdings to acheive a certain rate of return. During the three and six months ended June 30, 2018 , net income attributable to non-controlling partners was approximately $4.0 million and $8.0 million . During the three and six months ended June 30, 2017 , net income attributable to non-controlling partners was approximately $6.3 million and $12.4 million . During the six months ended June 30, 2018 and 2017 , Crestwood Niobrara paid cash distributions of $3.3 million and $7.6 million to its non-controlling partners, respectively. In July 2018, Crestwood Niobrara paid a cash distribution of $3.3 million to Jackalope Holdings for the quarter ended June 30, 2018 .

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings California Trucking Lawsuit. On March 13, 2017, a former Crestwood truck driver filed a lawsuit in the Superior Court (the Court) for Kern County, California on behalf of all Crestwood Transportation LLC’s California drivers alleging that Crestwood Equity and its officers, directors and employees violated the California wage and hour laws by failing to comply with certain requirements of the laws. The plaintiffs currently include a total of 13 former and current Company drivers, however they are seeking to certify this lawsuit as a class action, which could potentially include approximately 160 drivers. On February 26, 2018, the parties entered into a memorandum of agreement with respect to the lawsuit to settle any or all of the claims of the potential class members. On April 16, 2018, the parties executed the Stipulation of Settlement of Class Action and Release of Claims, which was preliminarily approved by the Court on May 29, 2018. The hearing for final approval of the settlement is scheduled for October 4, 2018. If approved and no appeals are filed, the settlement of this lawsuit should be finalized by late 2018. General. We are periodically involved in litigation proceedings. If we determine that a negative outcome is probable and the amount of loss is reasonably estimable, then we accrue the estimated amount. The results of litigation proceedings cannot be predicted with certainty. We could incur judgments, enter into settlements or revise our expectations regarding the outcome of certain matters, and such developments could have a material adverse effect on our results of operations or cash flows in the period in which the amounts are paid and/or accrued. As of June 30, 2018 and December 31, 2017 , both CEQP and CMLP had approximately $1.2 million and $2.1 million accrued for outstanding legal matters. Based on currently available information, we believe it is remote that future costs related to known contingent liability exposures for which we can estimate will exceed current accruals by an amount that would have a material adverse impact on our consolidated financial statements. As we learn new facts concerning contingencies, we reassess our position both with respect to accrued liabilities and other potential exposures. Any loss estimates are inherently subjective, based on currently available information, and are subject to management’s judgment and various assumptions. Due to the inherently subjective nature of these estimates and the uncertainty and unpredictability surrounding the outcome of legal proceedings, actual results may differ materially from any amounts that have been accrued. Regulatory Compliance In the ordinary course of our business, we are subject to various laws and regulations. In the opinion of our management, compliance with current laws and regulations will not have a material effect on our results of operations, cash flows or financial condition. Environmental Compliance Our operations are subject to stringent and complex laws and regulations pertaining to worker health, safety, and the environment. We are subject to laws and regulations at the federal, state, regional and local levels that relate to air and water quality, hazardous and solid waste management and disposal and other environmental matters. The cost of planning, designing, constructing and operating our facilities must incorporate compliance with environmental laws and regulations and safety standards. Failure to comply with these laws and regulations may trigger a variety of administrative, civil and potentially criminal enforcement measures. During 2014, we experienced three releases totaling approximately 28,000 barrels of produced water on our Arrow water gathering system located on the Fort Berthold Indian Reservation in North Dakota. We immediately notified the National Response Center, the Three Affiliated Tribes and numerous other regulatory authorities. Thereafter, we contained and cleaned up the releases, and placed the impacted segments of these water lines back into service. In May 2015, we experienced a release of approximately 5,200 barrels of produced water on our Arrow water gathering system, immediately notified numerous regulatory authorities and other third parties, and thereafter contained and cleaned up the releases. In October 2014, we received data requests from the Environmental Protection Agency (EPA) related to the 2014 water releases and we responded to the requests during the first half of 2015. In April 2015, the EPA issued a Notice of Potential Violation (NOPV) under the Clean Water Act relating to the 2014 water releases. We responded to the NOPV in May 2015 and in April 2017, we entered into an Administrative Order on Consent (the Order) with the EPA. The Order requires us to continue to remediate and monitor the impacted area for no less than four years unless all goals of the Order are satisfied earlier. On December 13, 2017, the EPA and Crestwood signed a Combined Complaint and Consent Agreement (CCCA) whereby we agreed to pay a civil penalty of $49,000 to the EPA and purchase emergency response equipment at an estimated cost of approximately $173,000 for the Three Affiliated Tribes as a Supplemental Environmental Project (SEP). The CCCA and SEP concludes the EPA’s penalty phase related to this matter. In August 2015, we received a notice of violation from the Three Affiliated Tribes’ Environmental Division related to our 2014 produced water releases on the Fort Berthold Indian Reservation. The notice of violation imposes fines and requests reimbursements exceeding $1.1 million ; however, the notice of violation was stayed on September 15, 2015, upon our posting of a performance bond for the amount contemplated by the notice, and pending the outcome of settlement discussions with the EPA related to the NOPV. Our discussions regarding the notice of violation continue with the Three Affiliated Tribes. We will continue our remediation efforts to ensure the impacted lands are restored to their prior state. We believe these releases are insurable events under our policies, and we have notified our carriers of these events. We have not recorded an insurance receivable as of June 30, 2018 . At June 30, 2018 and December 31, 2017 , our accrual of approximately $1.7 million and $1.9 million is based on our undiscounted estimate of amounts we will spend on compliance with environmental and other regulations, and any associated fines or penalties (including the Arrow water releases described above). We estimate that our potential liability for reasonably possible outcomes related to our environmental exposures could range from approximately $1.7 million to $3.5 million at June 30, 2018 . Self-Insurance We utilize third-party insurance subject to varying retention levels of self-insurance, which management considers prudent. Such self-insurance relates to losses and liabilities primarily associated with medical claims, workers’ compensation claims and general, product, vehicle and environmental liability. At June 30, 2018 and December 31, 2017 , CEQP’s self-insurance reserves were $12.6 million and $ 13.6 million . We estimate that $9.1 million of this balance will be paid subsequent to June 30, 2019 . As such, CEQP has classified $9.1 million in other long-term liabilities on its consolidated balance sheet at June 30, 2018 . At June 30, 2018 and December 31, 2017 , CMLP’s self insurance reserves were $10.7 million and $11.6 million . CMLP estimates that $7.6 million of this balance will be paid subsequent to June 30, 2019 . As such, CMLP has classified $7.6 million in other long-term liabilities on its consolidated balance sheet at June 30, 2018 . Guarantees and Indemnifications. We are involved in various joint ventures that sometimes require financial and performance guarantees. In a financial guarantee, we are obligated to make payments if the guaranteed party fails to make payments under, or violates the terms of, the financial arrangement. In a performance guarantee, we provide assurance that the guaranteed party will execute on the terms of the contract. If they do not, we are required to perform on their behalf. We also periodically provide indemnification arrangements related to assets or businesses we have sold. For a further description of our guarantees associated with our joint ventures, see Note 5 , and for a further description of our guarantees associated with our assets or businesses we have sold, see our 2017 Annual Report on Form 10-K. Our potential exposure under guarantee and indemnification arrangements can range from a specified amount to an unlimited dollar amount, depending on the nature of the claim, specificity as to duration, and the particular transaction. As of June 30, 2018 and December 31, 2017 , we have no amounts accrued for these guarantees.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Crestwood Holdings indirectly owns both CEQP’s and CMLP’s general partner. The affiliates of Crestwood Holdings and its owners are considered CEQP’s and CMLP’s related parties. We enter into transactions with our affiliates within the ordinary course of business, including gas gathering and processing services under long-term contracts, product purchases and various operating agreements. The following table shows transactions with our affiliates which are reflected in our consolidated statements of operations ( in millions ): Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Revenues at CEQP and CMLP $ 0.3 $ 0.4 $ 0.6 $ 0.9 Costs of product/services sold at CEQP and CMLP (1) $ 32.2 $ 4.0 $ 45.3 $ 8.1 Operations and maintenance expenses at CEQP and CMLP (2) $ 7.3 $ 5.0 $ 14.0 $ 9.8 General and administrative expenses charged by CEQP to CMLP, net (3) $ 4.9 $ 4.9 $ 10.5 $ 10.4 General and administrative expenses at CEQP charged to (from) Crestwood Holdings, net (4) $ (4.4 ) $ 0.6 $ (4.8 ) $ (0.2 ) (1) Includes $15.2 million and $28.3 million during the three and six months ended June 30, 2018 related to purchases of NGLs from a subsidiary of Crestwood Permian and $17.0 million during both periods in 2018 related to an agency marketing agreement with Ascent Resources - Utica, LLC (Ascent). Includes $4.0 million and $8.1 million representing natural gas purchases from Sabine for the three and six months ended June 30, 2017 . Ascent and Sabine are affiliates of Crestwood Holdings. (2) We have operating agreements with certain of our unconsolidated affiliates pursuant to which we charge them operations and maintenance expenses in accordance with their respective agreements, and these charges are reflected as a reduction of operations and maintenance expenses in our consolidated statements of income. During the three and six months ended June 30, 2018 , we charged $2.1 million and $4.2 million to Stagecoach Gas, $0.9 million and $2.0 million to Tres Palacios, $4.1 million and $7.5 million to Crestwood Permian and $0.2 million and $0.3 million to Jackalope. During the three and six months ended June 30, 2017 , we charged $1.9 million and $4.5 million to Stagecoach Gas, $0.9 million and $1.8 million to Tres Palacios, $2.1 million and $3.3 million to Crestwood Permian, and $0.1 million and $0.2 million to Jackalope. (3) Includes $5.7 million and $12.1 million of net unit-based compensation charges allocated from CEQP to CMLP for the three and six months ended June 30, 2018 and $5.6 million and $11.9 million for the three and six months ended June 30, 2017. In addition, includes $0.8 million and $1.6 million of CMLP’s general and administrative costs allocated to CEQP during the three and six months ended June 30, 2018 and $0.7 million and $1.5 million during the three and six months ended June 30, 2017 . (4) Includes $4.6 million and $5.4 million unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three and six months ended June 30, 2018 and less than $0.1 million and $0.8 million during the three and six months ended June 30, 2017 . The following table shows accounts receivable and accounts payable from our affiliates ( in millions ): June 30, December 31, Accounts receivable at CEQP and CMLP $ 3.4 $ 7.1 Accounts payable at CEQP $ 18.9 $ 7.4 Accounts payable at CMLP $ 16.4 $ 5.0

Segments

Segments	6 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Segments	Segments Financial Information We have three operating and reportable segments: (i) gathering and processing operations; (ii) storage and transportation operations; and (iii) marketing, supply and logistics operations. Our corporate operations include all general and administrative expenses that are not allocated to our reportable segments. We assess the performance of our operating segments based on EBITDA, which is defined as income before income taxes, plus debt-related costs (interest and debt expense, net and loss on modification/extinguishment of debt) and depreciation, amortization and accretion expense. Below is a reconciliation of CEQP’s net income (loss) to EBITDA ( in millions ): Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Net income (loss) $ (21.5 ) $ 0.3 $ 12.6 $ (19.1 ) Add: Interest and debt expense, net 24.3 24.1 48.7 50.6 Loss on modification/extinguishment of debt — 0.4 — 37.7 Provision (benefit) for income taxes 0.2 — 0.2 (0.1 ) Depreciation, amortization and accretion 44.5 48.7 89.6 97.1 EBITDA $ 47.5 $ 73.5 $ 151.1 $ 166.2 Below is a reconciliation of CMLP’s net income (loss) to EBITDA ( in millions ): Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Net income (loss) $ (23.5 ) $ (1.9 ) $ 8.9 $ (23.3 ) Add: Interest and debt expense, net 24.3 24.1 48.7 50.6 Loss on modification/extinguishment of debt — 0.4 — 37.7 Provision (benefit) for income taxes 0.1 — 0.1 (0.1 ) Depreciation, amortization and accretion 47.4 51.4 95.2 102.6 EBITDA $ 48.3 $ 74.0 $ 152.9 $ 167.5 The following tables summarize CEQP’s and CMLP’s reportable segment data for the three and six months ended June 30, 2018 and 2017 ( in millions ). Intersegment revenues included in the following tables are accounted for as arms-length transactions that apply our revenue recognition policies as described in Note 2. Included in earnings from unconsolidated affiliates, net below was approximately $9.9 million and $8.2 million of depreciation and amortization expense, gains (losses) on long-lived assets, net, and interest expense related to our equity investments for the three months ended June 30, 2018 and 2017 and $19.6 million and $15.7 million for the six months ended June 30, 2018 and 2017 . Crestwood Equity Three Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 255.5 $ 5.1 $ 579.9 $ — $ 840.5 Intersegment revenues 45.4 2.5 (47.9 ) — — Costs of product/services sold 208.8 0.1 516.5 — 725.4 Operations and maintenance expense 17.8 0.8 13.3 — 31.9 General and administrative expense — — — 23.4 23.4 Loss on long-lived assets, net — — (24.4 ) — (24.4 ) Earnings from unconsolidated affiliates, net 4.5 7.5 — — 12.0 Other income, net — — — 0.1 0.1 EBITDA $ 78.8 $ 14.2 $ (22.2 ) $ (23.3 ) $ 47.5 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,584.9 $ 1,025.6 $ 600.3 $ 31.1 $ 4,241.9 Three Months Ended June 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 405.1 $ 8.5 $ 436.7 $ — $ 850.3 Intersegment revenues 34.1 1.7 (35.8 ) — — Costs of product/services sold 354.7 0.1 374.8 — 729.6 Operations and maintenance expense 18.2 1.3 14.7 — 34.2 General and administrative expense — — — 22.7 22.7 Earnings from unconsolidated affiliates, net 1.8 7.8 — — 9.6 Other income, net — — — 0.1 0.1 EBITDA $ 68.1 $ 16.6 $ 11.4 $ (22.6 ) $ 73.5 Six Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 595.8 $ 9.3 $ 1,350.4 $ — $ 1,955.5 Intersegment revenues 86.7 4.5 (91.2 ) — — Costs of product/services sold 496.5 0.2 1,194.5 — 1,691.2 Operations and maintenance expense 35.5 1.6 29.3 — 66.4 General and administrative expense — — — 47.3 47.3 Gain (loss) on long-lived assets, net 0.1 — (24.2 ) — (24.1 ) Earnings from unconsolidated affiliates, net 10.2 14.2 — — 24.4 Other income, net — — — 0.2 0.2 EBITDA $ 160.8 $ 26.2 $ 11.2 $ (47.1 ) $ 151.1 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,584.9 $ 1,025.6 $ 600.3 $ 31.1 $ 4,241.9 Six Months Ended June 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 773.7 $ 18.5 $ 886.2 $ — $ 1,678.4 Intersegment revenues 64.4 3.5 (67.9 ) — — Costs of product/services sold 671.3 0.1 741.7 — 1,413.1 Operations and maintenance expense 35.6 2.4 29.9 — 67.9 General and administrative expense — — — 49.1 49.1 Earnings from unconsolidated affiliates, net 3.4 14.3 — — 17.7 Other income, net — — — 0.2 0.2 EBITDA $ 134.6 $ 33.8 $ 46.7 $ (48.9 ) $ 166.2 Crestwood Midstream Three Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 255.5 $ 5.1 $ 579.9 $ — $ 840.5 Intersegment revenues 45.4 2.5 (47.9 ) — — Costs of product/services sold 208.8 0.1 516.5 — 725.4 Operations and maintenance expense 17.8 0.8 13.3 — 31.9 General and administrative expense — — — 22.5 22.5 Loss on long-lived assets, net — — (24.4 ) — (24.4 ) Earnings from unconsolidated affiliates, net 4.5 7.5 — — 12.0 EBITDA $ 78.8 $ 14.2 $ (22.2 ) $ (22.5 ) $ 48.3 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,765.6 $ 1,025.6 $ 600.3 $ 24.0 $ 4,415.5 Three Months Ended June 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 405.1 $ 8.5 $ 436.7 $ — $ 850.3 Intersegment revenues 34.1 1.7 (35.8 ) — — Costs of product/services sold 354.7 0.1 374.8 — 729.6 Operations and maintenance expense 18.2 1.3 14.7 — 34.2 General and administrative expense — — — 22.1 22.1 Earnings from unconsolidated affiliates, net 1.8 7.8 — — 9.6 EBITDA $ 68.1 $ 16.6 $ 11.4 $ (22.1 ) $ 74.0 Six Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 595.8 $ 9.3 $ 1,350.4 $ — $ 1,955.5 Intersegment revenues 86.7 4.5 (91.2 ) — — Costs of product/services sold 496.5 0.2 1,194.5 — 1,691.2 Operations and maintenance expense 35.5 1.6 29.3 — 66.4 General and administrative expense — — — 45.3 45.3 Gain (loss) on long-lived assets, net 0.1 — (24.2 ) — (24.1 ) Earnings from unconsolidated affiliates, net 10.2 14.2 — — 24.4 EBITDA $ 160.8 $ 26.2 $ 11.2 $ (45.3 ) $ 152.9 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,765.6 $ 1,025.6 $ 600.3 $ 24.0 $ 4,415.5 Six Months Ended June 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 773.7 $ 18.5 $ 886.2 $ — $ 1,678.4 Intersegment revenues 64.4 3.5 (67.9 ) — — Costs of product/services sold 671.3 0.1 741.7 — 1,413.1 Operations and maintenance expense 35.6 2.4 29.9 — 67.9 General and administrative expense — — — 47.6 47.6 Earnings from unconsolidated affiliates, net 3.4 14.3 — — 17.7 EBITDA $ 134.6 $ 33.8 $ 46.7 $ (47.6 ) $ 167.5 In conjunction with the adoption of the provisions of Topic 606 , we began reporting our revenues from contracts with customers disaggregated by type of product/service sold and by commodity type for each of our segments for the three and six months ended June 30, 2018 , as we believe it best depicts how the nature, amount, timing and uncertainty of our revenues and cash flows are affected by economic factors. See details in the table below for disaggregation of our revenues (in millions) . Three Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Revenues: Topic 606 revenues Gathering Natural gas $ 33.9 $ — $ — $ — $ 33.9 Crude oil 9.4 — — — 9.4 Water 13.7 — — — 13.7 Processing Natural gas 2.7 — — — 2.7 NGLs — — 2.4 — 2.4 Compression Natural gas 7.9 — — — 7.9 Storage Crude oil 0.4 1.2 — (0.3 ) 1.3 NGLs — — 2.3 — 2.3 Pipeline Crude oil — 1.4 — (0.5 ) 0.9 Transportation Crude oil 0.6 — 1.7 — 2.3 NGLs — — 9.7 — 9.7 Water — — — — — Rail Loading — Crude oil — 4.7 — (1.5 ) 3.2 NGLs — — 1.1 — 1.1 Product Sales Natural gas 11.9 — 8.9 (2.8 ) 18.0 Crude oil 197.7 — 266.0 (37.0 ) 426.7 NGLs 22.7 — 254.8 (5.6 ) 271.9 Other — 0.3 — (0.2 ) 0.1 Total Topic 606 revenues 300.9 7.6 546.9 (47.9 ) 807.5 Non-Topic 606 revenues (1) — — 33.0 — 33.0 Total revenues $ 300.9 $ 7.6 $ 579.9 $ (47.9 ) $ 840.5 (1) Represents revenues related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Six Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Revenues: Topic 606 revenues Gathering Natural gas $ 69.3 $ — $ — $ — $ 69.3 Crude oil 18.6 — — — 18.6 Water 25.8 — — — 25.8 Processing Natural gas 5.4 — — — 5.4 NGLs — — 4.1 — 4.1 Compression Natural gas 15.5 — — — 15.5 Storage Crude oil 0.9 1.8 — (0.5 ) 2.2 NGLs — — 5.5 — 5.5 Pipeline Crude oil — 2.6 — (1.0 ) 1.6 Transportation Crude oil 1.2 — 2.9 — 4.1 NGLs — — 19.4 — 19.4 Water — — 0.2 — 0.2 Rail Loading Crude oil — 8.7 — (2.5 ) 6.2 NGLs — — 2.2 — 2.2 Product Sales Natural gas 25.3 — 16.7 (6.7 ) 35.3 Crude oil 477.6 — 456.6 (69.3 ) 864.9 NGLs 42.9 — 712.0 (10.7 ) 744.2 Other — 0.7 — (0.5 ) 0.2 Total Topic 606 revenues 682.5 13.8 1,219.6 (91.2 ) 1,824.7 Non-Topic 606 revenues (1) — — 130.8 — 130.8 Total revenues $ 682.5 $ 13.8 $ 1,350.4 $ (91.2 ) $ 1,955.5 (1) Represents revenues related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities.

Condensed Consolidating Financi

Condensed Consolidating Financial Information	6 Months Ended
	Jun. 30, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Financial Information	Condensed Consolidating Financial Information Crestwood Midstream is a holding company (Parent) and owns no operating assets and has no significant operations independent of its subsidiaries. Obligations under Crestwood Midstream’s senior notes and its credit facility are jointly and severally guaranteed by substantially all of its subsidiaries, except for Crestwood Infrastructure, Crestwood Niobrara, Crestwood Pipeline and Storage Northeast LLC (Crestwood Northeast), PRBIC and Tres Holdings and their respective subsidiaries (collectively, Non-Guarantor Subsidiaries). Crestwood Midstream Finance Corp., the co-issuer of the senior notes, is Crestwood Midstream’s 100% owned subsidiary and has no material assets, operations, revenues or cash flows other than those related to its service as co-issuer of the Crestwood Midstream senior notes. The tables below present condensed consolidating financial statements for Crestwood Midstream as Parent on a stand-alone, unconsolidated basis, and Crestwood Midstream’s combined guarantor and combined non-guarantor subsidiaries as of June 30, 2018 and December 31, 2017 , and for the three and six months ended June 30, 2018 and 2017 . The financial information may not necessarily be indicative of the results of operations, cash flows or financial position had the subsidiaries operated as independent entities. Crestwood Midstream Partners LP Condensed Consolidating Balance Sheet June 30, 2018 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash $ 5.7 $ — $ — $ — $ 5.7 Accounts receivable — 321.3 3.0 — 324.3 Inventory — 73.6 — — 73.6 Other current assets — 68.3 — — 68.3 Total current assets 5.7 463.2 3.0 — 471.9 Property, plant and equipment, net — 2,071.3 — — 2,071.3 Goodwill and intangible assets, net — 713.2 — — 713.2 Investment in consolidated affiliates 3,670.6 — — (3,670.6 ) — Investment in unconsolidated affiliates — — 1,156.7 — 1,156.7 Other assets — 2.4 — — 2.4 Total assets $ 3,676.3 $ 3,250.1 $ 1,159.7 $ (3,670.6 ) $ 4,415.5 Liabilities and partners’ capital Current liabilities: Accounts payable $ — $ 307.8 $ — $ — $ 307.8 Other current liabilities 20.7 87.4 — — 108.1 Total current liabilities 20.7 395.2 — — 415.9 Long-term liabilities: Long-term debt, less current portion 1,561.0 — — — 1,561.0 Other long-term liabilities — 106.7 57.0 — 163.7 Deferred income taxes — 0.6 — — 0.6 Partners’ capital 2,094.6 2,747.6 923.0 (3,670.6 ) 2,094.6 Interest of non-controlling partners in subsidiary — — 179.7 — 179.7 Total partners’ capital 2,094.6 2,747.6 1,102.7 (3,670.6 ) 2,274.3 Total liabilities and partners’ capital $ 3,676.3 $ 3,250.1 $ 1,159.7 $ (3,670.6 ) $ 4,415.5 Crestwood Midstream Partners LP Condensed Consolidating Balance Sheet December 31, 2017 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash $ 1.0 $ — $ — $ — $ 1.0 Accounts receivable — 439.7 2.9 — 442.6 Inventory — 68.4 — — 68.4 Other current assets — 18.1 — — 18.1 Total current assets 1.0 526.2 2.9 — 530.1 Property, plant and equipment, net — 2,007.5 — — 2,007.5 Goodwill and intangible assets, net — 743.3 — — 743.3 Investment in consolidated affiliates 3,705.4 — — (3,705.4 ) — Investment in unconsolidated affiliates — — 1,183.0 — 1,183.0 Other assets — 2.4 — — 2.4 Total assets $ 3,706.4 $ 3,279.4 $ 1,185.9 $ (3,705.4 ) $ 4,466.3 Liabilities and partners’ capital Current liabilities: Accounts payable $ — $ 346.8 $ — $ — $ 346.8 Other current liabilities 20.5 134.0 — — 154.5 Total current liabilities 20.5 480.8 — — 501.3 Long-term liabilities: Long-term debt, less current portion 1,490.5 0.8 — — 1,491.3 Other long-term liabilities — 45.6 57.0 — 102.6 Deferred income taxes — 0.7 — — 0.7 Partners’ capital 2,195.4 2,751.5 953.9 (3,705.4 ) 2,195.4 Interest of non-controlling partners in subsidiary — — 175.0 — 175.0 Total partners’ capital 2,195.4 2,751.5 1,128.9 (3,705.4 ) 2,370.4 Total liabilities and partners’ capital $ 3,706.4 $ 3,279.4 $ 1,185.9 $ (3,705.4 ) $ 4,466.3 Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended June 30, 2018 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 840.5 $ — $ — $ 840.5 Costs of product/services sold — 725.4 — — 725.4 Operating expenses and other: Operations and maintenance — 31.9 — — 31.9 General and administrative 12.1 10.4 — — 22.5 Depreciation, amortization and accretion — 47.4 — — 47.4 Loss on long-lived assets, net — 24.4 — — 24.4 12.1 114.1 — — 126.2 Operating income (loss) (12.1 ) 1.0 — — (11.1 ) Earnings from unconsolidated affiliates, net — — 12.0 — 12.0 Interest and debt expense, net (24.3 ) — — — (24.3 ) Equity in net income (loss) of subsidiaries 8.9 — — (8.9 ) — Income (loss) before income taxes (27.5 ) 1.0 12.0 (8.9 ) (23.4 ) Provision for income taxes — (0.1 ) — — (0.1 ) Net income (loss) (27.5 ) 0.9 12.0 (8.9 ) (23.5 ) Net income attributable to non-controlling partners in subsidiaries — — 4.0 — 4.0 Net income (loss) attributable to Crestwood Midstream Partners LP $ (27.5 ) $ 0.9 $ 8.0 $ (8.9 ) $ (27.5 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended June 30, 2017 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 850.3 $ — $ — $ 850.3 Costs of product/services sold — 729.6 — — 729.6 Operating expenses: Operations and maintenance — 34.2 — — 34.2 General and administrative 16.6 5.5 — — 22.1 Depreciation, amortization and accretion — 51.4 — — 51.4 16.6 91.1 — — 107.7 Operating income (loss) (16.6 ) 29.6 — — 13.0 Earnings from unconsolidated affiliates, net — — 9.6 — 9.6 Interest and debt expense, net (24.1 ) — — — (24.1 ) Loss on modification/extinguishment of debt (0.4 ) — — — (0.4 ) Equity in net income (loss) of subsidiaries 32.9 — — (32.9 ) — Net income (loss) (8.2 ) 29.6 9.6 (32.9 ) (1.9 ) Net income attributable to non-controlling partners in subsidiaries — — 6.3 — 6.3 Net income (loss) attributable to Crestwood Midstream Partners LP $ (8.2 ) $ 29.6 $ 3.3 $ (32.9 ) $ (8.2 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Six Months Ended June 30, 2018 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 1,955.5 $ — $ — $ 1,955.5 Costs of product/services sold — 1,691.2 — — 1,691.2 Operating expenses and other: Operations and maintenance — 66.4 — — 66.4 General and administrative 27.7 17.6 — — 45.3 Depreciation, amortization and accretion — 95.2 — — 95.2 Loss on long-lived assets, net — 24.1 — — 24.1 27.7 203.3 — — 231.0 Operating income (loss) (27.7 ) 61.0 — — 33.3 Earnings from unconsolidated affiliates, net — — 24.4 — 24.4 Interest and debt expense, net (48.7 ) — — — (48.7 ) Equity in net income (loss) of subsidiaries 77.3 — — (77.3 ) — Income (loss) before income taxes 0.9 61.0 24.4 (77.3 ) 9.0 Provision for income taxes — (0.1 ) — — (0.1 ) Net income (loss) 0.9 60.9 24.4 (77.3 ) 8.9 Net income attributable to non-controlling partners in subsidiaries — — 8.0 — 8.0 Net income (loss) attributable to Crestwood Midstream Partners LP $ 0.9 $ 60.9 $ 16.4 $ (77.3 ) $ 0.9 Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Six Months Ended June 30, 2017 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 1,678.4 $ — $ — $ 1,678.4 Costs of product/services sold — 1,413.1 — — 1,413.1 Operating expenses: Operations and maintenance — 67.9 — — 67.9 General and administrative 34.9 12.7 — — 47.6 Depreciation, amortization and accretion — 102.6 — — 102.6 34.9 183.2 — — 218.1 Operating income (loss) (34.9 ) 82.1 — — 47.2 Earnings from unconsolidated affiliates, net — — 17.7 — 17.7 Interest and debt expense, net (50.6 ) — — — (50.6 ) Loss on modification/extinguishment of debt (37.7 ) — — — (37.7 ) Equity in net income (loss) of subsidiaries 87.5 — — (87.5 ) — Income (loss) before income taxes (35.7 ) 82.1 17.7 (87.5 ) (23.4 ) Benefit for income taxes — 0.1 — — 0.1 Net income (loss) (35.7 ) 82.2 17.7 (87.5 ) (23.3 ) Net income attributable to non-controlling partners in subsidiaries — — 12.4 — 12.4 Net income (loss) attributable to Crestwood Midstream Partners LP $ (35.7 ) $ 82.2 $ 5.3 $ (87.5 ) $ (35.7 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2018 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Cash flows from operating activities $ (72.6 ) $ 212.9 $ 24.1 $ — $ 164.4 Cash flows from investing activities: Purchases of property, plant and equipment (2.4 ) (116.3 ) — — (118.7 ) Investment in unconsolidated affiliates — — (6.9 ) — (6.9 ) Capital distributions from unconsolidated affiliates — — 23.9 — 23.9 Net proceeds from sale of assets — 6.8 — — 6.8 Capital distributions from consolidated affiliates 37.8 — — (37.8 ) — Net cash provided by (used in) investing activities 35.4 (109.5 ) 17.0 (37.8 ) (94.9 ) Cash flows from financing activities: Proceeds from the issuance of long-term debt 847.1 — — — 847.1 Payments on long-term debt (780.3 ) (0.7 ) — — (781.0 ) Payments on capital leases — (0.7 ) — — (0.7 ) Distributions to partners (120.0 ) — (3.3 ) — (123.3 ) Distributions to parent — — (37.8 ) 37.8 — Taxes paid for unit-based compensation vesting — (6.9 ) — — (6.9 ) Change in intercompany balances 95.1 (95.1 ) — — — Net cash provided by (used in) financing activities 41.9 (103.4 ) (41.1 ) 37.8 (64.8 ) Net change in cash 4.7 — — — 4.7 Cash at beginning of period 1.0 — — — 1.0 Cash at end of period $ 5.7 $ — $ — $ — $ 5.7 Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2017 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Cash flows from operating activities $ (83.2 ) $ 202.7 $ 16.6 $ — $ 136.1 Cash flows from investing activities: Purchases of property, plant and equipment (2.8 ) (85.9 ) — — (88.7 ) Investment in unconsolidated affiliates — — (18.5 ) — (18.5 ) Capital distributions from unconsolidated affiliates — — 21.1 — 21.1 Net proceeds from sale of assets — 1.0 — — 1.0 Capital distributions from consolidated affiliates 11.6 — — (11.6 ) — Net cash provided by (used in) investing activities 8.8 (84.9 ) 2.6 (11.6 ) (85.1 ) Cash flows from financing activities: Proceeds from the issuance of long-term debt 1,680.4 — — — 1,680.4 Payments on long-term debt (1,629.6 ) (0.7 ) — — (1,630.3 ) Payments on capital leases — (1.3 ) — — (1.3 ) Payments for debt-related deferred costs (1.0 ) — — — (1.0 ) Distributions to partners (86.9 ) — (7.6 ) — (94.5 ) Distributions to parent — — (11.6 ) 11.6 — Taxes paid for unit-based compensation vesting — (3.6 ) — — (3.6 ) Change in intercompany balances 112.2 (112.2 ) — — — Net cash provided by (used in) financing activities 75.1 (117.8 ) (19.2 ) 11.6 (50.3 ) Net change in cash 0.7 — — — 0.7 Cash at beginning of period 1.3 — — — 1.3 Cash at end of period $ 2.0 $ — $ — $ — $ 2.0

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Effective January 1, 2018, we adopted the following accounting standards. There were no other material changes in our significant accounting policies from those described in our 2017 Annual Report on Form10-K. Revenue Recognition We provide gathering, processing, compression, storage, fractionation, and transportation (consisting of pipelines, truck and rail terminals, truck/trailer units and rail cars) services and we sell commodities (including crude oil, natural gas, NGLs and water) under various contracts. These contracts include: • Fixed-fee contracts . Under these contracts, we do not take title to the underlying crude oil, natural gas or NGLs but charge our customers a fixed-fee for the services we provide, which can be a firm reservation charge and/or a charge per volume gathered, processed, compressed, stored, loaded and/or transported (which, in certain contracts, can be subject to a minimum level of volumes); • Percentage-of-proceeds service contracts . Under these contracts, we take title to crude oil, natural gas or NGLs after the commodity leaves our gathering and processing facilities. We often market and sell those commodities to third parties after they leave our facilities and we will remit a portion of the sales proceeds to our producers; • Percentage-of-proceeds product contracts. Under these contracts, we take title to crude oil, natural gas or NGLs before the commodity enters our facilities. We market and sell those commodities to third parties and we will remit a portion of the sales proceeds to our producers; and • Purchase and sale contracts . Under these contracts, we purchase crude oil, natural gas or NGLs before the commodity enters our facilities, and we market and sell those commodities to third parties. On January 1, 2018, we adopted the provisions of Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606) , which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. We adopted the standard using the modified retrospective method for all revenue contracts that involve revenue generating activities that occur after January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under the new standard, while amounts prior to January 1, 2018 continue to be reported in accordance with our historic accounting under Revenue Recognition (Topic 605) . Prior to January 1, 2018, we recognized revenues for services and products when all of the following criteria were met under Topic 605 : (i) services had been rendered or products delivered or sold; (ii) persuasive evidence of an exchange arrangement existed; (iii) the price for services was fixed or determinable; and (iv) collectability was reasonably assured. We recorded deferred revenue when we received amounts from our customers but had not yet met the criteria listed above. We recognized deferred revenue in our consolidated statement of operations when the criteria had been met and all services had been rendered. At December 31, 2017, we had deferred revenue of approximately $0.6 million , which is reflected in accrued expenses and other liabilities on our consolidated balance sheet. Beginning January 1, 2018, we recognize revenues for services and products under revenue contracts as our obligations to perform services or deliver/sell products under the contracts are satisfied. A contract’s transaction price is allocated to each performance obligation in the contract and recognized as revenue when, or as, the performance obligation is satisfied. Our fixed-fee contracts and our percentage-of-proceeds service contracts primarily have a single performance obligation to deliver a series of distinct goods or services that are substantially the same and have the same pattern of transfer to our customers. For performance obligations associated with these contracts, we recognize revenues over time utilizing the output method based on the actual volumes of products delivered/sold or services performed, because the single performance obligation is satisfied over time using the same performance measure of progress toward satisfaction of the performance obligation . The transaction price under certain of our fixed-price contracts and percentage-of-proceeds service contracts includes variable consideration that varies primarily based on actual volumes that are delivered under the contracts. Because the variable consideration specifically relates to our efforts to transfer the services and/or products under the contracts, we allocate the variable consideration entirely to the distinct service utilizing the allocation exception guidance under Topic 606 , and accordingly recognize the variable consideration as revenues at the time the good or service is transferred to the customer. Certain of our fixed-fee contracts contain minimum volume features under which the customers must utilize our services to gather, compress or load a specified quantity of crude oil or natural gas or pay a deficiency fee based on the difference between actual volumes and the contractual minimum volume. We recognize revenues from these contracts when actual volumes are gathered, compressed or loaded and the likelihood of a customer exercising its remaining rights to make up the deficient volumes under minimum volume commitments becomes remote. We recognize revenues at a point in time for performance obligations associated with our percentage-of proceeds product contracts and purchase and sale contracts, and these revenues are recognized because control of the underlying product is transferred to the customer when the distinct good is provided to the customer. The evaluation of when performance obligations have been satisfied and the transaction price that is allocated to our performance obligations requires significant judgment and assumptions, including our evaluation of the timing of when control of the underlying good or service has transferred to our customers and the relative standalone selling price of goods and services provided to customers under contracts with multiple performance obligations. Actual results can significantly vary from those judgments and assumptions. We did not have any material contracts with multiple performance obligations or under which we receive material amounts of non-cash consideration during the six months ended June 30, 2018. The following table summarizes the transaction price allocated to our remaining performance obligations under certain contracts that have not been recognized as of June 30, 2018 (in millions) : Remainder of 2018 $ 32.9 2019 25.4 2020 20.7 2021 8.7 2022 7.3 Thereafter 10.5 Total $ 105.5 Our remaining performance obligations presented in the table above exclude estimates of variable rate escalation clauses in our contracts with customers, and is generally limited to fixed-fee and percentage-of-proceeds service contracts which have fixed pricing and minimum volume terms and conditions. Our remaining performance obligations generally exclude, based on the following practical expedients that we elected to apply, disclosures for (i) variable consideration allocated to a wholly-unsatisfied promise to transfer a distinct service that forms part of the identified single performance obligation; (ii) unsatisfied performance obligations where the contract term is one year or less; and (iii) contracts for which we recognize revenues as amounts are invoiced. Contract Assets and Contract Liabilities . Amounts due from our customers under our revenue contracts are typically billed as the service is being provided or on a weekly, bi-weekly or monthly basis and are due within 30 days of billing. Under certain of our contracts, we recognize revenues in excess of billings which we present as contract assets on our consolidated balance sheets. Under certain contracts, we may be entitled to receive payments in advance of satisfying our performance obligations under the contract. We recognize a liability for these payments in excess of revenue recognized and present it as deferred revenue or contract liabilities on our consolidated balance sheets. Our deferred revenue primarily relates to: • Capital Reimbursements. Certain contracts in our G&P segment require that our customers reimburse us for capital expenditures related to the construction of long-lived assets utilized to provide services to them under the revenue contracts. Because we consider these amounts as consideration from customers associated with ongoing services to be provided to customers, we defer these upfront payments in deferred revenue and recognize the amounts in revenue over the life of the associated revenue contract as the performance obligations are satisfied under the contract. On January 1, 2018, we recorded an $87.6 million increase to our property, plant and equipment, net, a $69.1 million increase to our deferred revenue liability and an $18.5 million increase to partners’ capital as a result of applying the cumulative impact of adopting the new standard on these types of contracts. • Contracts with Increasing (Decreasing) Rates per Unit. Certain contracts in our G&P, S&T and MS&L segments have fixed rates per volume that increase and/or decrease over the life of the contract once certain time periods or thresholds are met. We record revenues on these contracts ratably per unit over the life of the contract based on the remaining performance obligations to be performed, which can result in the deferral of revenue for the difference between the consideration received and the ratable revenue recognized. On January 1, 2018, we recorded a $1.5 million increase to our deferred revenue liability and a corresponding decrease to partners’ capital as a result of applying the cumulative impact of adopting the new standard on these types of contracts. Our contract assets and contract liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. Our receivables related to our Topic 606 revenue contracts totaled $312.4 million for both CEQP and CMLP at June 30, 2018, and are included in accounts receivable on our consolidated balance sheet. Our contract assets are included in other non-current assets on our consolidated balance sheet. The majority of our deferred revenues are included in other long-term liabilities on our consolidated balance sheet and are classified as non-current, for which the majority of revenue is expected to be recognized as the performance obligations under the related revenue contracts are satisfied over the next 14 years . The following table summarizes the opening and closing balances of our contract assets and contract liabilities (in millions) : Balance at January 1, 2018 Balance at June 30, 2018 Contract Assets (Non-current) $ 1.1 $ 1.0 Contract Liabilities (Current) (1) 12.2 12.4 Contract Liabilities (Non-current) (2) 60.6 62.9 (1) Our current contract liabilities primarily consist of current deferred revenues and are included in accrued expenses and other liabilities on our consolidated balance sheets. During the three and six months ended June 30, 2018, we recognized revenues of approximately $3.1 million and $6.2 million that were previously included in deferred revenues (current) at January 1, 2018. (2) Our non-current contract liabilities primarily consist of non-current deferred revenues and are included in other long-term liabilities on our consolidated balance sheets. Impact of financial statement line items . For contracts that were modified prior to January 1, 2018, we have not retrospectively restated the contract for those modifications and instead we have reflected the aggregate effect of those modifications when identifying satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price to satisfied and unsatisfied obligations. The impact of applying this transition practical expedient was not material to our financial statements. The adoption of Topic 606 had the following impact on CEQP’s and CMLP’s consolidated income statements and balance sheets (in millions) : Crestwood Equity Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Income Statement Product revenues: Gathering and processing (1) $ 186.9 $ 437.3 $ (250.4 ) $ 459.1 $ 866.9 $ (407.8 ) Service revenues: Gathering and processing (1)(2) 68.5 78.4 (9.9 ) 136.6 157.9 (21.3 ) Marketing, supply and logistics (3) 17.0 16.8 0.2 33.8 33.3 0.5 Costs of product/services sold: Product costs (1) 681.8 945.0 (263.2 ) 1,620.7 2,055.5 (434.8 ) Depreciation, amortization and accretion (2) 44.5 43.3 1.2 89.6 87.1 2.5 Earnings from unconsolidated affiliates, net (4) 12.0 15.0 (3.0 ) 24.4 29.4 (5.0 ) Net income (loss) (21.5 ) (20.4 ) (1.1 ) 12.6 13.9 (1.3 ) June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,409.8 $ 2,300.5 $ 109.3 Accumulated depreciation and depletion (2) 518.1 503.4 14.7 Investments in unconsolidated affiliates (4) 1,156.7 1,171.2 (14.5 ) Liabilities: Accrued expenses and other liabilities (2)(3) 85.2 73.5 11.7 Other long-term liabilities (2)(3) 166.2 104.0 62.2 Partners’ capital: Crestwood Equity Partners LP partners’ capital (2)(3)(4) 1,300.3 1,294.1 6.2 Crestwood Midstream Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Income Statement Product revenues: Gathering and processing (1) $ 186.9 $ 437.3 $ (250.4 ) $ 459.1 $ 866.9 $ (407.8 ) Service revenues: Gathering and processing (1)(2) 68.5 78.4 (9.9 ) 136.6 157.9 (21.3 ) Marketing, supply and logistics (3) 17.0 16.8 0.2 33.8 33.3 0.5 Costs of product/services sold: Product costs (1) 681.8 945.0 (263.2 ) 1,620.7 2,055.5 (434.8 ) Depreciation, amortization and accretion (2) 47.4 46.2 1.2 95.2 92.7 2.5 Earnings from unconsolidated affiliates, net (4) 12.0 15.0 (3.0 ) 24.4 29.4 (5.0 ) Net income (loss) (23.5 ) (22.4 ) (1.1 ) 8.9 10.2 (1.3 ) June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,739.9 $ 2,630.6 $ 109.3 Accumulated depreciation and depletion (2) 668.6 653.9 14.7 Investments in unconsolidated affiliates (4) 1,156.7 1,171.2 (14.5 ) Liabilities: Accrued expenses and other liabilities (2)(3) 84.2 72.5 11.7 Other long-term liabilities (2)(3) 163.7 101.5 62.2 Partners’ capital (2)(3)(4) 2,094.6 2,088.4 6.2 (1) On January 1, 2018, we began classifying product and service revenues as a reduction of costs of product sold on certain of our gathering and processing contracts where we do not obtain control of the customers’ product prior to it entering our facilities. (2) On January 1, 2018, we began recording proceeds received from customers for reimbursable construction as deferred revenue instead of as reductions of property, plant and equipment. (3) For contracts that have fixed rates per volume that increase and/or decrease over the life of the contract once certain time periods or thresholds have been met, on January 1, 2018, we began recording revenues on those contracts ratably per unit over the life of the contract based on the remaining performance obligations to be performed. (4) On January 1, 2018, Jackalope Gas Gathering Services, L.L.C. (Jackalope) adopted the provisions of Topic 606 , and we recorded a $9.5 million decrease to our equity method investment and a corresponding decrease to our partners’ capital to reflect our proportionate share of the cumulative effect of accounting change recorded by the equity investment related to the new standard. In addition, our earnings from unconsolidated affiliates decreased by approximately $3.0 million and $5.0 million during the three and six months ended June 30, 2018 to reflect our proportionate share of the ongoing impact of the new standard on Jackalope’s revenues. The adoption of Topic 606 was not material to our other equity method investments.
New Accounting Pronouncements Issued But Not Yet Adopted	New Accounting Pronouncements Issued But Not Yet Adopted As of June 30, 2018 , the following accounting standard had not yet been adopted by us: In February 2016, the Financial Accounting Standards Board issued ASU 2016-02, Leases (Topic 842) , which revises the accounting for leases by requiring certain leases to be recognized as assets and liabilities on the balance sheet, and requiring companies to disclose additional information about their leasing arrangements. Companies are required to adopt the provisions of the standard using the modified retrospective transition method. We expect to adopt the provisions of this standard effective January 1, 2019. We are in the process of implementing appropriate changes to our processes, systems and controls to support the accounting and disclosure requirements of the new standard and are currently evaluating the impact that this standard will have on our consolidated financial statements.

Basis of Presentation and Sum23

Basis of Presentation and Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The following table summarizes the opening and closing balances of our contract assets and contract liabilities (in millions) : Balance at January 1, 2018 Balance at June 30, 2018 Contract Assets (Non-current) $ 1.1 $ 1.0 Contract Liabilities (Current) (1) 12.2 12.4 Contract Liabilities (Non-current) (2) 60.6 62.9 (1) Our current contract liabilities primarily consist of current deferred revenues and are included in accrued expenses and other liabilities on our consolidated balance sheets. During the three and six months ended June 30, 2018, we recognized revenues of approximately $3.1 million and $6.2 million that were previously included in deferred revenues (current) at January 1, 2018. (2) Our non-current contract liabilities primarily consist of non-current deferred revenues and are included in other long-term liabilities on our consolidated balance sheets. The adoption of Topic 606 had the following impact on CEQP’s and CMLP’s consolidated income statements and balance sheets (in millions) : Crestwood Equity Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Income Statement Product revenues: Gathering and processing (1) $ 186.9 $ 437.3 $ (250.4 ) $ 459.1 $ 866.9 $ (407.8 ) Service revenues: Gathering and processing (1)(2) 68.5 78.4 (9.9 ) 136.6 157.9 (21.3 ) Marketing, supply and logistics (3) 17.0 16.8 0.2 33.8 33.3 0.5 Costs of product/services sold: Product costs (1) 681.8 945.0 (263.2 ) 1,620.7 2,055.5 (434.8 ) Depreciation, amortization and accretion (2) 44.5 43.3 1.2 89.6 87.1 2.5 Earnings from unconsolidated affiliates, net (4) 12.0 15.0 (3.0 ) 24.4 29.4 (5.0 ) Net income (loss) (21.5 ) (20.4 ) (1.1 ) 12.6 13.9 (1.3 ) June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,409.8 $ 2,300.5 $ 109.3 Accumulated depreciation and depletion (2) 518.1 503.4 14.7 Investments in unconsolidated affiliates (4) 1,156.7 1,171.2 (14.5 ) Liabilities: Accrued expenses and other liabilities (2)(3) 85.2 73.5 11.7 Other long-term liabilities (2)(3) 166.2 104.0 62.2 Partners’ capital: Crestwood Equity Partners LP partners’ capital (2)(3)(4) 1,300.3 1,294.1 6.2 Crestwood Midstream Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Income Statement Product revenues: Gathering and processing (1) $ 186.9 $ 437.3 $ (250.4 ) $ 459.1 $ 866.9 $ (407.8 ) Service revenues: Gathering and processing (1)(2) 68.5 78.4 (9.9 ) 136.6 157.9 (21.3 ) Marketing, supply and logistics (3) 17.0 16.8 0.2 33.8 33.3 0.5 Costs of product/services sold: Product costs (1) 681.8 945.0 (263.2 ) 1,620.7 2,055.5 (434.8 ) Depreciation, amortization and accretion (2) 47.4 46.2 1.2 95.2 92.7 2.5 Earnings from unconsolidated affiliates, net (4) 12.0 15.0 (3.0 ) 24.4 29.4 (5.0 ) Net income (loss) (23.5 ) (22.4 ) (1.1 ) 8.9 10.2 (1.3 ) June 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,739.9 $ 2,630.6 $ 109.3 Accumulated depreciation and depletion (2) 668.6 653.9 14.7 Investments in unconsolidated affiliates (4) 1,156.7 1,171.2 (14.5 ) Liabilities: Accrued expenses and other liabilities (2)(3) 84.2 72.5 11.7 Other long-term liabilities (2)(3) 163.7 101.5 62.2 Partners’ capital (2)(3)(4) 2,094.6 2,088.4 6.2 (1) On January 1, 2018, we began classifying product and service revenues as a reduction of costs of product sold on certain of our gathering and processing contracts where we do not obtain control of the customers’ product prior to it entering our facilities. (2) On January 1, 2018, we began recording proceeds received from customers for reimbursable construction as deferred revenue instead of as reductions of property, plant and equipment. (3) For contracts that have fixed rates per volume that increase and/or decrease over the life of the contract once certain time periods or thresholds have been met, on January 1, 2018, we began recording revenues on those contracts ratably per unit over the life of the contract based on the remaining performance obligations to be performed. (4) On January 1, 2018, Jackalope Gas Gathering Services, L.L.C. (Jackalope) adopted the provisions of Topic 606 , and we recorded a $9.5 million decrease to our equity method investment and a corresponding decrease to our partners’ capital to reflect our proportionate share of the cumulative effect of accounting change recorded by the equity investment related to the new standard. In addition, our earnings from unconsolidated affiliates decreased by approximately $3.0 million and $5.0 million during the three and six months ended June 30, 2018 to reflect our proportionate share of the ongoing impact of the new standard on Jackalope’s revenues. The adoption of Topic 606 was not material to our other equity method investments. The following table summarizes the transaction price allocated to our remaining performance obligations under certain contracts that have not been recognized as of June 30, 2018 (in millions) : Remainder of 2018 $ 32.9 2019 25.4 2020 20.7 2021 8.7 2022 7.3 Thereafter 10.5 Total $ 105.5

Certain Balance Sheet Informa24

Certain Balance Sheet Information (Tables)	6 Months Ended
	Jun. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Schedule of Accrued Liabilities	Accrued expenses and other liabilities consisted of the following ( in millions ): CEQP CMLP June 30, December 31, June 30, December 31, 2018 2017 2018 2017 Accrued expenses $ 35.7 $ 56.6 $ 34.7 $ 55.5 Accrued property taxes 6.0 4.8 6.0 4.8 Income tax payable 0.2 0.3 0.2 0.3 Interest payable 20.5 20.3 20.5 20.3 Accrued additions to property, plant and equipment 9.2 22.3 9.2 22.2 Capital leases 1.2 1.0 1.2 1.0 Deferred revenue 12.4 0.6 12.4 0.6 Total accrued expenses and other liabilities $ 85.2 $ 105.9 $ 84.2 $ 104.7

Investments in Unconsolidated25

Investments in Unconsolidated Affiliates (Tables)	6 Months Ended
	Jun. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Distributions and Contributions The following table summarizes our distributions and contributions from our unconsolidated affiliates (in millions) : Distributions (1) Contributions Six Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Stagecoach Gas $ 22.5 $ 23.7 $ — $ — Jackalope 15.0 12.3 6.8 1.5 Crestwood Permian (2) 8.3 — 0.1 86.4 Tres Holdings 1.4 2.7 — — PRBIC 0.9 0.6 — — Total $ 48.1 $ 39.3 $ 6.9 $ 87.9 (1) In July 2018, we received cash distributions from Stagecoach Gas, Crestwood Permian, Tres Holdings and PRBIC of approximately $12.2 million , $2.3 million , $2.5 million and $0.5 million , respectively. In July 2018, we made a cash contribution of approximately $2.5 million to Tres Holdings. (2) On June 21, 2017, we contributed to Crestwood Permian 100% of the equity interest of Crestwood New Mexico at our historical book value of approximately $69.4 million . This contribution was treated as a non-cash transaction between entities under common control. Net Investments and Earnings Our net investments in and earnings from our unconsolidated affiliates are as follows ( in millions ): Investment Earnings (Loss) from Unconsolidated Affiliates June 30, December 31, Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 2018 2017 Stagecoach Gas Services LLC (1) $ 840.0 $ 849.8 $ 7.0 $ 6.6 $ 12.7 $ 12.6 Jackalope Gas Gathering Services, L.L.C. (2)(6) 174.0 184.9 3.8 2.2 6.8 4.0 Crestwood Permian Basin Holdings LLC (3) 97.2 102.0 0.7 (0.4 ) 3.4 (0.6 ) Tres Palacios Holdings LLC (4) 36.8 37.8 — 0.7 0.4 1.2 Powder River Basin Industrial Complex, LLC (5) 8.7 8.5 0.5 0.5 1.1 0.5 Total $ 1,156.7 $ 1,183.0 $ 12.0 $ 9.6 $ 24.4 $ 17.7 (1) As of June 30, 2018 , our equity in the underlying net assets of Stagecoach Gas exceeded our investment balance by approximately $51.4 million . This excess amount is entirely attributable to goodwill and, as such, is not subject to amortization. Our Stagecoach Gas investment is included in our storage and transportation segment. (2) As of June 30, 2018 , our equity in the underlying net assets of Jackalope exceeded our investment balance by approximately $0.7 million . We amortize this amount over the life of Jackalope’s gathering agreement with Chesapeake Energy Corporation (Chesapeake), and we reflect the amortization as an increase in our earnings from unconsolidated affiliates. Our Jackalope investment is included in our gathering and processing segment. (3) In June 2017, we contributed to Crestwood Permian 100% of the equity interest of Crestwood New Mexico Pipeline LLC (Crestwood New Mexico). This contribution was treated as a transaction between entities under common control (because of our relationship with First Reserve) and the accounting standards related to such transactions required Crestwood Permian to record the assets and liabilities of Crestwood New Mexico at our historical book value. The difference between our equity in Crestwood Permian’s net assets and our investment balance is not subject to amortization. Our Crestwood Permian investment is included in our gathering and processing segment. (4) As of June 30, 2018 , our equity in the underlying net assets of Tres Palacios Holdings LLC (Tres Holdings) exceeded our investment balance by approximately $25.9 million . We amortize this amount over the life of the Tres Palacios Gas Storage LLC sublease agreement, and we reflect the amortization as an increase in our earnings from unconsolidated affiliates. Our Tres Holdings investment is included in our storage and transportation segment. (5) As of June 30, 2018 , our equity in the underlying net assets of Powder River Basin Industrial Complex, LLC (PRBIC) exceeded our investment balance by approximately $6.1 million . We amortize this amount over the life of PRBIC’s property, plant and equipment and its agreement with Chesapeake, and we reflect the amortization as an increase in our earnings from unconsolidated affiliates. Our PRBIC investment is included in our storage and transportation segment. (6) On January 1, 2018, Jackalope adopted the provisions of Topic 606 , and we recorded a $9.5 million decrease to our equity method investment and a corresponding decrease to our partners’ capital to reflect our proportionate share of the cumulative effect of accounting change recorded by the equity investment related to the new standard. In addition, our earnings from unconsolidated affiliates decreased by approximately $3.0 million and $5.0 million during the three and six months ended June 30, 2018 to reflect our proportionate share of Jackalope’s deferred revenues related to the new standard. Summarized Financial Information of Unconsolidated Affiliates Below is the summarized operating results for our significant unconsolidated affiliates ( in millions; amounts represent 100% of unconsolidated affiliate information ): Six Months Ended June 30, 2018 2017 Operating Revenues Operating Expenses Net Income Operating Revenues Operating Expenses Net Income Stagecoach Gas $ 85.5 $ 39.9 $ 45.6 $ 84.0 $ 38.0 $ 46.1 Other (1) 92.9 76.8 18.9 76.5 63.3 13.1 Total $ 178.4 $ 116.7 $ 64.5 $ 160.5 $ 101.3 $ 59.2 (1) Includes our Jackalope, Crestwood Permian, Tres Holdings and PRBIC equity investments. We amortize the excess basis in certain of our equity investments as an increase in our earnings from unconsolidated affiliates. We recorded amortization of the excess basis in our Jackalope equity investment of less than $0.1 million for both the six months ended June 30, 2018 and 2017 . We recorded amortization of the excess basis in our Tres Holdings equity investment of approximately $0.6 million for both the six months ended June 30, 2018 and 2017 . We recorded amortization of the excess basis in our PRBIC equity investment of approximately $0.3 million for both the six months ended June 30, 2018 and 2017 .

Risk Management (Tables)

Risk Management (Tables)	6 Months Ended
	Jun. 30, 2018
Risk Management - Notional Amounts and Terms of Companys Derivative Financial Instruments [Abstract]
Notional Amounts And Terms Of Company's Derivative Financial Instruments	The notional amounts and terms of our derivative financial instruments include the following: June 30, 2018 December 31, 2017 Fixed Price Payor Fixed Price Receiver Fixed Price Payor Fixed Price Receiver Propane, crude and heating oil (MMBbls) 11.6 13.8 15.3 17.5 Natural gas (MMcf) 870 820 780 660

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	We estimate the fair value of our senior notes primarily based on quoted market prices for the same or similar issuances (representing a Level 2 fair value measurement). The following table reflects the carrying amount (reduced for deferred financing costs associated with the respective notes) and fair value of our senior notes ( in millions ): June 30, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value 2023 Senior Notes $ 692.9 $ 713.8 $ 692.1 $ 728.8 2025 Senior Notes $ 492.8 $ 500.4 $ 492.3 $ 517.9
Assets And Liabilities Measured At Fair Value On Recurring Basis	The following tables set forth by level within the fair value hierarchy, our financial instruments that were accounted for at fair value on a recurring basis at June 30, 2018 and December 31, 2017 ( in millions ): June 30, 2018 Level 1 Level 2 Level 3 Gross Fair Value Contract Netting (1) Collateral/Margin Received or Paid Fair Value Assets Assets from price risk management $ 5.1 $ 71.2 $ — $ 76.3 $ (50.2 ) $ (20.1 ) $ 6.0 Suburban Propane Partners, L.P. units (2) 3.4 — — 3.4 — — 3.4 Total assets at fair value $ 8.5 $ 71.2 $ — $ 79.7 $ (50.2 ) $ (20.1 ) $ 9.4 Liabilities Liabilities from price risk management $ 5.8 $ 65.3 $ — $ 71.1 $ (50.2 ) $ 2.1 $ 23.0 Total liabilities at fair value $ 5.8 $ 65.3 $ — $ 71.1 $ (50.2 ) $ 2.1 $ 23.0 December 31, 2017 Level 1 Level 2 Level 3 Gross Fair Value Contract Netting (1) Collateral/Margin Received or Paid Fair Value Assets Assets from price risk management $ 1.1 $ 102.2 $ — $ 103.3 $ (74.6 ) $ (21.5 ) $ 7.2 Suburban Propane Partners, L.P. units (2) 3.5 — — 3.5 — — 3.5 Total assets at fair value $ 4.6 $ 102.2 $ — $ 106.8 $ (74.6 ) $ (21.5 ) $ 10.7 Liabilities Liabilities from price risk management $ 1.4 $ 118.2 $ — $ 119.6 $ (74.6 ) $ 3.9 $ 48.9 Total liabilities at fair value $ 1.4 $ 118.2 $ — $ 119.6 $ (74.6 ) $ 3.9 $ 48.9 (1) Amounts represent the impact of legally enforceable master netting agreements that allow us to settle positive and negative positions as well as cash collateral held or placed with the same counterparties. (2) Amount is reflected in other assets on CEQP’s consolidated balance sheets.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2018
Text Block [Abstract]
Components Of Long-Term Debt	Long-term debt consisted of the following at June 30, 2018 and December 31, 2017 ( in millions ): June 30, December 31, Credit Facility $ 385.0 $ 318.2 2023 Senior Notes 700.0 700.0 2025 Senior Notes 500.0 500.0 Other 1.7 2.4 Less: deferred financing costs, net 24.8 28.4 Total debt 1,561.9 1,492.2 Less: current portion 0.9 0.9 Total long-term debt, less current portion $ 1,561.0 $ 1,491.3

Partners' Capital (Tables)

Partners' Capital (Tables)	6 Months Ended
	Jun. 30, 2018
Statement of Partners' Capital [Abstract]
Schedule of Distributions Made to Members or Limited Partners, by Distribution	A summary of CEQP’s limited partner quarterly cash distributions for the six months ended June 30, 2018 and 2017 is presented below: Record Date Payment Date Per Unit Rate Cash Distributions ( in millions ) 2018 February 7, 2018 February 14, 2018 $ 0.60 $ 42.7 May 8, 2018 May 15, 2018 0.60 42.7 $ 85.4 2017 February 7, 2017 February 14, 2017 $ 0.60 $ 41.8 May 8, 2017 May 15, 2017 0.60 41.8 $ 83.6

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2018
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	The following table shows transactions with our affiliates which are reflected in our consolidated statements of operations ( in millions ): Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Revenues at CEQP and CMLP $ 0.3 $ 0.4 $ 0.6 $ 0.9 Costs of product/services sold at CEQP and CMLP (1) $ 32.2 $ 4.0 $ 45.3 $ 8.1 Operations and maintenance expenses at CEQP and CMLP (2) $ 7.3 $ 5.0 $ 14.0 $ 9.8 General and administrative expenses charged by CEQP to CMLP, net (3) $ 4.9 $ 4.9 $ 10.5 $ 10.4 General and administrative expenses at CEQP charged to (from) Crestwood Holdings, net (4) $ (4.4 ) $ 0.6 $ (4.8 ) $ (0.2 ) (1) Includes $15.2 million and $28.3 million during the three and six months ended June 30, 2018 related to purchases of NGLs from a subsidiary of Crestwood Permian and $17.0 million during both periods in 2018 related to an agency marketing agreement with Ascent Resources - Utica, LLC (Ascent). Includes $4.0 million and $8.1 million representing natural gas purchases from Sabine for the three and six months ended June 30, 2017 . Ascent and Sabine are affiliates of Crestwood Holdings. (2) We have operating agreements with certain of our unconsolidated affiliates pursuant to which we charge them operations and maintenance expenses in accordance with their respective agreements, and these charges are reflected as a reduction of operations and maintenance expenses in our consolidated statements of income. During the three and six months ended June 30, 2018 , we charged $2.1 million and $4.2 million to Stagecoach Gas, $0.9 million and $2.0 million to Tres Palacios, $4.1 million and $7.5 million to Crestwood Permian and $0.2 million and $0.3 million to Jackalope. During the three and six months ended June 30, 2017 , we charged $1.9 million and $4.5 million to Stagecoach Gas, $0.9 million and $1.8 million to Tres Palacios, $2.1 million and $3.3 million to Crestwood Permian, and $0.1 million and $0.2 million to Jackalope. (3) Includes $5.7 million and $12.1 million of net unit-based compensation charges allocated from CEQP to CMLP for the three and six months ended June 30, 2018 and $5.6 million and $11.9 million for the three and six months ended June 30, 2017. In addition, includes $0.8 million and $1.6 million of CMLP’s general and administrative costs allocated to CEQP during the three and six months ended June 30, 2018 and $0.7 million and $1.5 million during the three and six months ended June 30, 2017 . (4) Includes $4.6 million and $5.4 million unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three and six months ended June 30, 2018 and less than $0.1 million and $0.8 million during the three and six months ended June 30, 2017 .
Schedule of Related Party Receivables and Payables	The following table shows accounts receivable and accounts payable from our affiliates ( in millions ): June 30, December 31, Accounts receivable at CEQP and CMLP $ 3.4 $ 7.1 Accounts payable at CEQP $ 18.9 $ 7.4 Accounts payable at CMLP $ 16.4 $ 5.0

Segments (Tables)

Segments (Tables)	6 Months Ended
	Jun. 30, 2018
Segment Reporting, Other Significant Reconciling Item [Line Items]
Reconciliation of Net Income (Loss) to Earnings Before Interest, Taxes, Depreciation and Amortization	Below is a reconciliation of CEQP’s net income (loss) to EBITDA ( in millions ): Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Net income (loss) $ (21.5 ) $ 0.3 $ 12.6 $ (19.1 ) Add: Interest and debt expense, net 24.3 24.1 48.7 50.6 Loss on modification/extinguishment of debt — 0.4 — 37.7 Provision (benefit) for income taxes 0.2 — 0.2 (0.1 ) Depreciation, amortization and accretion 44.5 48.7 89.6 97.1 EBITDA $ 47.5 $ 73.5 $ 151.1 $ 166.2
Summary Of Segment Information	The following tables summarize CEQP’s and CMLP’s reportable segment data for the three and six months ended June 30, 2018 and 2017 ( in millions ). Intersegment revenues included in the following tables are accounted for as arms-length transactions that apply our revenue recognition policies as described in Note 2. Included in earnings from unconsolidated affiliates, net below was approximately $9.9 million and $8.2 million of depreciation and amortization expense, gains (losses) on long-lived assets, net, and interest expense related to our equity investments for the three months ended June 30, 2018 and 2017 and $19.6 million and $15.7 million for the six months ended June 30, 2018 and 2017 . Crestwood Equity Three Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 255.5 $ 5.1 $ 579.9 $ — $ 840.5 Intersegment revenues 45.4 2.5 (47.9 ) — — Costs of product/services sold 208.8 0.1 516.5 — 725.4 Operations and maintenance expense 17.8 0.8 13.3 — 31.9 General and administrative expense — — — 23.4 23.4 Loss on long-lived assets, net — — (24.4 ) — (24.4 ) Earnings from unconsolidated affiliates, net 4.5 7.5 — — 12.0 Other income, net — — — 0.1 0.1 EBITDA $ 78.8 $ 14.2 $ (22.2 ) $ (23.3 ) $ 47.5 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,584.9 $ 1,025.6 $ 600.3 $ 31.1 $ 4,241.9 Three Months Ended June 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 405.1 $ 8.5 $ 436.7 $ — $ 850.3 Intersegment revenues 34.1 1.7 (35.8 ) — — Costs of product/services sold 354.7 0.1 374.8 — 729.6 Operations and maintenance expense 18.2 1.3 14.7 — 34.2 General and administrative expense — — — 22.7 22.7 Earnings from unconsolidated affiliates, net 1.8 7.8 — — 9.6 Other income, net — — — 0.1 0.1 EBITDA $ 68.1 $ 16.6 $ 11.4 $ (22.6 ) $ 73.5 Six Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 595.8 $ 9.3 $ 1,350.4 $ — $ 1,955.5 Intersegment revenues 86.7 4.5 (91.2 ) — — Costs of product/services sold 496.5 0.2 1,194.5 — 1,691.2 Operations and maintenance expense 35.5 1.6 29.3 — 66.4 General and administrative expense — — — 47.3 47.3 Gain (loss) on long-lived assets, net 0.1 — (24.2 ) — (24.1 ) Earnings from unconsolidated affiliates, net 10.2 14.2 — — 24.4 Other income, net — — — 0.2 0.2 EBITDA $ 160.8 $ 26.2 $ 11.2 $ (47.1 ) $ 151.1 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,584.9 $ 1,025.6 $ 600.3 $ 31.1 $ 4,241.9 Six Months Ended June 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 773.7 $ 18.5 $ 886.2 $ — $ 1,678.4 Intersegment revenues 64.4 3.5 (67.9 ) — — Costs of product/services sold 671.3 0.1 741.7 — 1,413.1 Operations and maintenance expense 35.6 2.4 29.9 — 67.9 General and administrative expense — — — 49.1 49.1 Earnings from unconsolidated affiliates, net 3.4 14.3 — — 17.7 Other income, net — — — 0.2 0.2 EBITDA $ 134.6 $ 33.8 $ 46.7 $ (48.9 ) $ 166.2
Disaggregation of Revenue	See details in the table below for disaggregation of our revenues (in millions) . Three Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Revenues: Topic 606 revenues Gathering Natural gas $ 33.9 $ — $ — $ — $ 33.9 Crude oil 9.4 — — — 9.4 Water 13.7 — — — 13.7 Processing Natural gas 2.7 — — — 2.7 NGLs — — 2.4 — 2.4 Compression Natural gas 7.9 — — — 7.9 Storage Crude oil 0.4 1.2 — (0.3 ) 1.3 NGLs — — 2.3 — 2.3 Pipeline Crude oil — 1.4 — (0.5 ) 0.9 Transportation Crude oil 0.6 — 1.7 — 2.3 NGLs — — 9.7 — 9.7 Water — — — — — Rail Loading — Crude oil — 4.7 — (1.5 ) 3.2 NGLs — — 1.1 — 1.1 Product Sales Natural gas 11.9 — 8.9 (2.8 ) 18.0 Crude oil 197.7 — 266.0 (37.0 ) 426.7 NGLs 22.7 — 254.8 (5.6 ) 271.9 Other — 0.3 — (0.2 ) 0.1 Total Topic 606 revenues 300.9 7.6 546.9 (47.9 ) 807.5 Non-Topic 606 revenues (1) — — 33.0 — 33.0 Total revenues $ 300.9 $ 7.6 $ 579.9 $ (47.9 ) $ 840.5 (1) Represents revenues related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Six Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Revenues: Topic 606 revenues Gathering Natural gas $ 69.3 $ — $ — $ — $ 69.3 Crude oil 18.6 — — — 18.6 Water 25.8 — — — 25.8 Processing Natural gas 5.4 — — — 5.4 NGLs — — 4.1 — 4.1 Compression Natural gas 15.5 — — — 15.5 Storage Crude oil 0.9 1.8 — (0.5 ) 2.2 NGLs — — 5.5 — 5.5 Pipeline Crude oil — 2.6 — (1.0 ) 1.6 Transportation Crude oil 1.2 — 2.9 — 4.1 NGLs — — 19.4 — 19.4 Water — — 0.2 — 0.2 Rail Loading Crude oil — 8.7 — (2.5 ) 6.2 NGLs — — 2.2 — 2.2 Product Sales Natural gas 25.3 — 16.7 (6.7 ) 35.3 Crude oil 477.6 — 456.6 (69.3 ) 864.9 NGLs 42.9 — 712.0 (10.7 ) 744.2 Other — 0.7 — (0.5 ) 0.2 Total Topic 606 revenues 682.5 13.8 1,219.6 (91.2 ) 1,824.7 Non-Topic 606 revenues (1) — — 130.8 — 130.8 Total revenues $ 682.5 $ 13.8 $ 1,350.4 $ (91.2 ) $ 1,955.5 (1) Represents revenues related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities.
Crestwood Midstream Partners LP
Segment Reporting, Other Significant Reconciling Item [Line Items]
Reconciliation of Net Income (Loss) to Earnings Before Interest, Taxes, Depreciation and Amortization	Below is a reconciliation of CMLP’s net income (loss) to EBITDA ( in millions ): Three Months Ended Six Months Ended June 30, June 30, 2018 2017 2018 2017 Net income (loss) $ (23.5 ) $ (1.9 ) $ 8.9 $ (23.3 ) Add: Interest and debt expense, net 24.3 24.1 48.7 50.6 Loss on modification/extinguishment of debt — 0.4 — 37.7 Provision (benefit) for income taxes 0.1 — 0.1 (0.1 ) Depreciation, amortization and accretion 47.4 51.4 95.2 102.6 EBITDA $ 48.3 $ 74.0 $ 152.9 $ 167.5
Summary Of Segment Information	Crestwood Midstream Three Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 255.5 $ 5.1 $ 579.9 $ — $ 840.5 Intersegment revenues 45.4 2.5 (47.9 ) — — Costs of product/services sold 208.8 0.1 516.5 — 725.4 Operations and maintenance expense 17.8 0.8 13.3 — 31.9 General and administrative expense — — — 22.5 22.5 Loss on long-lived assets, net — — (24.4 ) — (24.4 ) Earnings from unconsolidated affiliates, net 4.5 7.5 — — 12.0 EBITDA $ 78.8 $ 14.2 $ (22.2 ) $ (22.5 ) $ 48.3 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,765.6 $ 1,025.6 $ 600.3 $ 24.0 $ 4,415.5 Three Months Ended June 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 405.1 $ 8.5 $ 436.7 $ — $ 850.3 Intersegment revenues 34.1 1.7 (35.8 ) — — Costs of product/services sold 354.7 0.1 374.8 — 729.6 Operations and maintenance expense 18.2 1.3 14.7 — 34.2 General and administrative expense — — — 22.1 22.1 Earnings from unconsolidated affiliates, net 1.8 7.8 — — 9.6 EBITDA $ 68.1 $ 16.6 $ 11.4 $ (22.1 ) $ 74.0 Six Months Ended June 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 595.8 $ 9.3 $ 1,350.4 $ — $ 1,955.5 Intersegment revenues 86.7 4.5 (91.2 ) — — Costs of product/services sold 496.5 0.2 1,194.5 — 1,691.2 Operations and maintenance expense 35.5 1.6 29.3 — 66.4 General and administrative expense — — — 45.3 45.3 Gain (loss) on long-lived assets, net 0.1 — (24.2 ) — (24.1 ) Earnings from unconsolidated affiliates, net 10.2 14.2 — — 24.4 EBITDA $ 160.8 $ 26.2 $ 11.2 $ (45.3 ) $ 152.9 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,765.6 $ 1,025.6 $ 600.3 $ 24.0 $ 4,415.5 Six Months Ended June 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 773.7 $ 18.5 $ 886.2 $ — $ 1,678.4 Intersegment revenues 64.4 3.5 (67.9 ) — — Costs of product/services sold 671.3 0.1 741.7 — 1,413.1 Operations and maintenance expense 35.6 2.4 29.9 — 67.9 General and administrative expense — — — 47.6 47.6 Earnings from unconsolidated affiliates, net 3.4 14.3 — — 17.7 EBITDA $ 134.6 $ 33.8 $ 46.7 $ (47.6 ) $ 167.5

Condensed Consolidating Finan32

Condensed Consolidating Financial Information (Tables)	6 Months Ended
	Jun. 30, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheet	Crestwood Midstream Partners LP Condensed Consolidating Balance Sheet June 30, 2018 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash $ 5.7 $ — $ — $ — $ 5.7 Accounts receivable — 321.3 3.0 — 324.3 Inventory — 73.6 — — 73.6 Other current assets — 68.3 — — 68.3 Total current assets 5.7 463.2 3.0 — 471.9 Property, plant and equipment, net — 2,071.3 — — 2,071.3 Goodwill and intangible assets, net — 713.2 — — 713.2 Investment in consolidated affiliates 3,670.6 — — (3,670.6 ) — Investment in unconsolidated affiliates — — 1,156.7 — 1,156.7 Other assets — 2.4 — — 2.4 Total assets $ 3,676.3 $ 3,250.1 $ 1,159.7 $ (3,670.6 ) $ 4,415.5 Liabilities and partners’ capital Current liabilities: Accounts payable $ — $ 307.8 $ — $ — $ 307.8 Other current liabilities 20.7 87.4 — — 108.1 Total current liabilities 20.7 395.2 — — 415.9 Long-term liabilities: Long-term debt, less current portion 1,561.0 — — — 1,561.0 Other long-term liabilities — 106.7 57.0 — 163.7 Deferred income taxes — 0.6 — — 0.6 Partners’ capital 2,094.6 2,747.6 923.0 (3,670.6 ) 2,094.6 Interest of non-controlling partners in subsidiary — — 179.7 — 179.7 Total partners’ capital 2,094.6 2,747.6 1,102.7 (3,670.6 ) 2,274.3 Total liabilities and partners’ capital $ 3,676.3 $ 3,250.1 $ 1,159.7 $ (3,670.6 ) $ 4,415.5 Crestwood Midstream Partners LP Condensed Consolidating Balance Sheet December 31, 2017 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash $ 1.0 $ — $ — $ — $ 1.0 Accounts receivable — 439.7 2.9 — 442.6 Inventory — 68.4 — — 68.4 Other current assets — 18.1 — — 18.1 Total current assets 1.0 526.2 2.9 — 530.1 Property, plant and equipment, net — 2,007.5 — — 2,007.5 Goodwill and intangible assets, net — 743.3 — — 743.3 Investment in consolidated affiliates 3,705.4 — — (3,705.4 ) — Investment in unconsolidated affiliates — — 1,183.0 — 1,183.0 Other assets — 2.4 — — 2.4 Total assets $ 3,706.4 $ 3,279.4 $ 1,185.9 $ (3,705.4 ) $ 4,466.3 Liabilities and partners’ capital Current liabilities: Accounts payable $ — $ 346.8 $ — $ — $ 346.8 Other current liabilities 20.5 134.0 — — 154.5 Total current liabilities 20.5 480.8 — — 501.3 Long-term liabilities: Long-term debt, less current portion 1,490.5 0.8 — — 1,491.3 Other long-term liabilities — 45.6 57.0 — 102.6 Deferred income taxes — 0.7 — — 0.7 Partners’ capital 2,195.4 2,751.5 953.9 (3,705.4 ) 2,195.4 Interest of non-controlling partners in subsidiary — — 175.0 — 175.0 Total partners’ capital 2,195.4 2,751.5 1,128.9 (3,705.4 ) 2,370.4 Total liabilities and partners’ capital $ 3,706.4 $ 3,279.4 $ 1,185.9 $ (3,705.4 ) $ 4,466.3
Condensed Income Statement	Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended June 30, 2018 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 840.5 $ — $ — $ 840.5 Costs of product/services sold — 725.4 — — 725.4 Operating expenses and other: Operations and maintenance — 31.9 — — 31.9 General and administrative 12.1 10.4 — — 22.5 Depreciation, amortization and accretion — 47.4 — — 47.4 Loss on long-lived assets, net — 24.4 — — 24.4 12.1 114.1 — — 126.2 Operating income (loss) (12.1 ) 1.0 — — (11.1 ) Earnings from unconsolidated affiliates, net — — 12.0 — 12.0 Interest and debt expense, net (24.3 ) — — — (24.3 ) Equity in net income (loss) of subsidiaries 8.9 — — (8.9 ) — Income (loss) before income taxes (27.5 ) 1.0 12.0 (8.9 ) (23.4 ) Provision for income taxes — (0.1 ) — — (0.1 ) Net income (loss) (27.5 ) 0.9 12.0 (8.9 ) (23.5 ) Net income attributable to non-controlling partners in subsidiaries — — 4.0 — 4.0 Net income (loss) attributable to Crestwood Midstream Partners LP $ (27.5 ) $ 0.9 $ 8.0 $ (8.9 ) $ (27.5 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended June 30, 2017 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 850.3 $ — $ — $ 850.3 Costs of product/services sold — 729.6 — — 729.6 Operating expenses: Operations and maintenance — 34.2 — — 34.2 General and administrative 16.6 5.5 — — 22.1 Depreciation, amortization and accretion — 51.4 — — 51.4 16.6 91.1 — — 107.7 Operating income (loss) (16.6 ) 29.6 — — 13.0 Earnings from unconsolidated affiliates, net — — 9.6 — 9.6 Interest and debt expense, net (24.1 ) — — — (24.1 ) Loss on modification/extinguishment of debt (0.4 ) — — — (0.4 ) Equity in net income (loss) of subsidiaries 32.9 — — (32.9 ) — Net income (loss) (8.2 ) 29.6 9.6 (32.9 ) (1.9 ) Net income attributable to non-controlling partners in subsidiaries — — 6.3 — 6.3 Net income (loss) attributable to Crestwood Midstream Partners LP $ (8.2 ) $ 29.6 $ 3.3 $ (32.9 ) $ (8.2 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Six Months Ended June 30, 2018 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 1,955.5 $ — $ — $ 1,955.5 Costs of product/services sold — 1,691.2 — — 1,691.2 Operating expenses and other: Operations and maintenance — 66.4 — — 66.4 General and administrative 27.7 17.6 — — 45.3 Depreciation, amortization and accretion — 95.2 — — 95.2 Loss on long-lived assets, net — 24.1 — — 24.1 27.7 203.3 — — 231.0 Operating income (loss) (27.7 ) 61.0 — — 33.3 Earnings from unconsolidated affiliates, net — — 24.4 — 24.4 Interest and debt expense, net (48.7 ) — — — (48.7 ) Equity in net income (loss) of subsidiaries 77.3 — — (77.3 ) — Income (loss) before income taxes 0.9 61.0 24.4 (77.3 ) 9.0 Provision for income taxes — (0.1 ) — — (0.1 ) Net income (loss) 0.9 60.9 24.4 (77.3 ) 8.9 Net income attributable to non-controlling partners in subsidiaries — — 8.0 — 8.0 Net income (loss) attributable to Crestwood Midstream Partners LP $ 0.9 $ 60.9 $ 16.4 $ (77.3 ) $ 0.9 Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Six Months Ended June 30, 2017 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 1,678.4 $ — $ — $ 1,678.4 Costs of product/services sold — 1,413.1 — — 1,413.1 Operating expenses: Operations and maintenance — 67.9 — — 67.9 General and administrative 34.9 12.7 — — 47.6 Depreciation, amortization and accretion — 102.6 — — 102.6 34.9 183.2 — — 218.1 Operating income (loss) (34.9 ) 82.1 — — 47.2 Earnings from unconsolidated affiliates, net — — 17.7 — 17.7 Interest and debt expense, net (50.6 ) — — — (50.6 ) Loss on modification/extinguishment of debt (37.7 ) — — — (37.7 ) Equity in net income (loss) of subsidiaries 87.5 — — (87.5 ) — Income (loss) before income taxes (35.7 ) 82.1 17.7 (87.5 ) (23.4 ) Benefit for income taxes — 0.1 — — 0.1 Net income (loss) (35.7 ) 82.2 17.7 (87.5 ) (23.3 ) Net income attributable to non-controlling partners in subsidiaries — — 12.4 — 12.4 Net income (loss) attributable to Crestwood Midstream Partners LP $ (35.7 ) $ 82.2 $ 5.3 $ (87.5 ) $ (35.7 )
Condensed Cash Flow Statement	Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2018 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Cash flows from operating activities $ (72.6 ) $ 212.9 $ 24.1 $ — $ 164.4 Cash flows from investing activities: Purchases of property, plant and equipment (2.4 ) (116.3 ) — — (118.7 ) Investment in unconsolidated affiliates — — (6.9 ) — (6.9 ) Capital distributions from unconsolidated affiliates — — 23.9 — 23.9 Net proceeds from sale of assets — 6.8 — — 6.8 Capital distributions from consolidated affiliates 37.8 — — (37.8 ) — Net cash provided by (used in) investing activities 35.4 (109.5 ) 17.0 (37.8 ) (94.9 ) Cash flows from financing activities: Proceeds from the issuance of long-term debt 847.1 — — — 847.1 Payments on long-term debt (780.3 ) (0.7 ) — — (781.0 ) Payments on capital leases — (0.7 ) — — (0.7 ) Distributions to partners (120.0 ) — (3.3 ) — (123.3 ) Distributions to parent — — (37.8 ) 37.8 — Taxes paid for unit-based compensation vesting — (6.9 ) — — (6.9 ) Change in intercompany balances 95.1 (95.1 ) — — — Net cash provided by (used in) financing activities 41.9 (103.4 ) (41.1 ) 37.8 (64.8 ) Net change in cash 4.7 — — — 4.7 Cash at beginning of period 1.0 — — — 1.0 Cash at end of period $ 5.7 $ — $ — $ — $ 5.7 Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2017 (in millions) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Cash flows from operating activities $ (83.2 ) $ 202.7 $ 16.6 $ — $ 136.1 Cash flows from investing activities: Purchases of property, plant and equipment (2.8 ) (85.9 ) — — (88.7 ) Investment in unconsolidated affiliates — — (18.5 ) — (18.5 ) Capital distributions from unconsolidated affiliates — — 21.1 — 21.1 Net proceeds from sale of assets — 1.0 — — 1.0 Capital distributions from consolidated affiliates 11.6 — — (11.6 ) — Net cash provided by (used in) investing activities 8.8 (84.9 ) 2.6 (11.6 ) (85.1 ) Cash flows from financing activities: Proceeds from the issuance of long-term debt 1,680.4 — — — 1,680.4 Payments on long-term debt (1,629.6 ) (0.7 ) — — (1,630.3 ) Payments on capital leases — (1.3 ) — — (1.3 ) Payments for debt-related deferred costs (1.0 ) — — — (1.0 ) Distributions to partners (86.9 ) — (7.6 ) — (94.5 ) Distributions to parent — — (11.6 ) 11.6 — Taxes paid for unit-based compensation vesting — (3.6 ) — — (3.6 ) Change in intercompany balances 112.2 (112.2 ) — — — Net cash provided by (used in) financing activities 75.1 (117.8 ) (19.2 ) 11.6 (50.3 ) Net change in cash 0.7 — — — 0.7 Cash at beginning of period 1.3 — — — 1.3 Cash at end of period $ 2.0 $ — $ — $ — $ 2.0

Basis of Presentation and Sum33

Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	Jan. 01, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, net		$ 1,891.7		$ 1,891.7		$ 1,820.8
Contract with Customer, Liability, Revenue Recognized		3.1		6.2
Deferred Revenue						0.6
Revenue, Remaining Performance Obligation, Current Year		32.9		32.9
Revenue, Remaining Performance Obligation, Year Two		25.4		25.4
Revenue, Remaining Performance Obligation, Year Three		20.7		20.7
Revenue, Remaining Performance Obligation, Year Four		8.7		8.7
Revenue, Remaining Performance Obligation, Year Five		7.3		7.3
Revenue, Remaining Performance Obligation, Thereafter		10.5		10.5
Revenue, Remaining Performance Obligation		105.5		105.5
Contract Assets (Non-current)	$ 1.1	1		1
Contract Liabilities (Current)	12.2	12.4		12.4
Contract Liabilities (Non-current)	60.6	62.9		62.9
ASC 606 accounts receivable		312.4		$ 312.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period				14 years
Gathering and processing product revenues		186.9	$ 325.3	$ 459.1	$ 618.4
Gathering and processing service revenues		68.5	79.4	136.6	154.4
Marketing, supply and logistics		17	15.2	33.8	34.5
Product costs		681.8	713.7	1,620.7	1,380.4
Depreciation, amortization and accretion		44.5	48.7	89.6	97.1
Earnings from unconsolidated affiliates, net		12	9.6	24.4	17.7
Net income (loss)		(21.5)	0.3	12.6	(19.1)
Property, plant and equipment		2,409.8		2,409.8		2,285.2
Accumulated depreciation and depletion		518.1		518.1		464.4
Investments in unconsolidated affiliates		1,156.7		1,156.7		1,183
Accrued expenses and other liabilities		85.2		85.2		105.9
Other long-term liabilities		166.2		166.2		104.7
Crestwood Equity Partners LP partners' capital		1,300.3		1,300.3		1,393.5
Partners' capital		1,912.3		1,912.3		2,005.5
Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, net		2,071.3		2,071.3		2,007.5
Gathering and processing product revenues		186.9	325.3	459.1	618.4
Gathering and processing service revenues		68.5	79.4	136.6	154.4
Marketing, supply and logistics		17	15.2	33.8	34.5
Product costs		681.8	713.7	1,620.7	1,380.4
Depreciation, amortization and accretion		47.4	51.4	95.2	102.6
Earnings from unconsolidated affiliates, net		12	9.6	24.4	17.7
Net income (loss)		(23.5)	(1.9)	8.9	(23.3)
Property, plant and equipment		2,739.9		2,739.9		2,615.3
Accumulated depreciation and depletion		668.6		668.6		607.8
Investments in unconsolidated affiliates		1,156.7		1,156.7		1,183
Accrued expenses and other liabilities		84.2		84.2		104.7
Other long-term liabilities		163.7		163.7		102.6
Partners' capital		2,094.6		2,094.6		2,195.4
Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, net	87.6
Deferred Revenue	69.1
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Gathering and processing product revenues		(250.4)		(407.8)
Gathering and processing service revenues		(9.9)		(21.3)
Marketing, supply and logistics		0.2		0.5
Product costs		(263.2)		(434.8)
Depreciation, amortization and accretion		1.2		2.5
Earnings from unconsolidated affiliates, net		(3)		(5)
Net income (loss)		(1.1)		(1.3)
Property, plant and equipment		109.3		109.3
Accumulated depreciation and depletion		14.7		14.7
Investments in unconsolidated affiliates		(14.5)		(14.5)
Accrued expenses and other liabilities		11.7		11.7
Other long-term liabilities		62.2		62.2
Crestwood Equity Partners LP partners' capital		6.2		6.2
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Gathering and processing product revenues		(250.4)		(407.8)
Gathering and processing service revenues		(9.9)		(21.3)
Marketing, supply and logistics		0.2		0.5
Product costs		(263.2)		(434.8)
Depreciation, amortization and accretion		1.2		2.5
Earnings from unconsolidated affiliates, net		(3)		(5)
Net income (loss)		(1.1)		(1.3)
Property, plant and equipment		109.3		109.3
Accumulated depreciation and depletion		14.7		14.7
Investments in unconsolidated affiliates		(14.5)		(14.5)
Accrued expenses and other liabilities		11.7		11.7
Other long-term liabilities		62.2		62.2
Partners' capital		6.2		6.2
Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Gathering and processing product revenues		437.3		866.9
Gathering and processing service revenues		78.4		157.9
Marketing, supply and logistics		16.8		33.3
Product costs		945		2,055.5
Depreciation, amortization and accretion		43.3		87.1
Earnings from unconsolidated affiliates, net		15		29.4
Net income (loss)		(20.4)		13.9
Property, plant and equipment		2,300.5		2,300.5
Accumulated depreciation and depletion		503.4		503.4
Investments in unconsolidated affiliates		1,171.2		1,171.2
Accrued expenses and other liabilities		73.5		73.5
Other long-term liabilities		104		104
Crestwood Equity Partners LP partners' capital		1,294.1		1,294.1
Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09 | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Gathering and processing product revenues		437.3		866.9
Gathering and processing service revenues		78.4		157.9
Marketing, supply and logistics		16.8		33.3
Product costs		945		2,055.5
Depreciation, amortization and accretion		46.2		92.7
Earnings from unconsolidated affiliates, net		15		29.4
Net income (loss)		(22.4)		10.2
Property, plant and equipment		2,630.6		2,630.6
Accumulated depreciation and depletion		653.9		653.9
Investments in unconsolidated affiliates		1,171.2		1,171.2
Accrued expenses and other liabilities		72.5		72.5
Other long-term liabilities		101.5		101.5
Partners' capital		2,088.4		2,088.4
Jackalope Gas Gathering Services, L.L.C.
Summary Of Significant Accounting Policies [Line Items]
Earnings from unconsolidated affiliates, net		3.8	$ 2.2	6.8	$ 4
Investments in unconsolidated affiliates		174		174		$ 184.9
Jackalope Gas Gathering Services, L.L.C. | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
New Accounting Pronouncement, effect of adoption	9.5
New Accounting Pronouncement, Equity Earnings Decrease		$ 3		$ 5
Capital Reimbursements [Member] | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
New Accounting Pronouncement, effect of adoption	18.5
Contracts with increasing (decreasing) rates per unit | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
New Accounting Pronouncement, effect of adoption	$ 1.5

Assets Held for Sale (Details)

Assets Held for Sale (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets, Current	$ 54	$ 54	$ 3
Goodwill	138.6	138.6	147.6
Marketing Supply and Logistics
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill	92.7	92.7	$ 101.7
Marketing Supply and Logistics | West Coast [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill, Written off Related to Sale of Business Unit		9
Marketing Supply and Logistics | West Coast [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Assets, Current	54	54
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	24.5
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	$ 61.6	$ 61.6

Certain Balance Sheet Informa35

Certain Balance Sheet Information (Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Accrued Expenses and Other Liabilities [Line Items]
Accrued expenses	$ 35.7	$ 56.6
Accrued property taxes	6	4.8
Tax payable	0.2	0.3
Interest payable	20.5	20.3
Accrued additions to property, plant and equipment	9.2	22.3
Capital leases	1.2	1
Deferred revenue	12.4	0.6
Total accrued expenses and other liabilities	85.2	105.9
Crestwood Midstream Partners LP
Accrued Expenses and Other Liabilities [Line Items]
Accrued expenses	34.7	55.5
Accrued property taxes	6	4.8
Tax payable	0.2	0.3
Interest payable	20.5	20.3
Accrued additions to property, plant and equipment	9.2	22.2
Capital leases	1.2	1
Deferred revenue	12.4	0.6
Total accrued expenses and other liabilities	$ 84.2	$ 104.7

Investments in Unconsolidated36

Investments in Unconsolidated Affiliates Net Investments In and Earnings (Loss) from Unconsolidated Affiliates (Details) - USD ($) $ in Millions	Jan. 01, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Net proceeds from sale of assets				$ 6.8	$ 1
Investment		$ 1,156.7		1,156.7		$ 1,183
Earnings from unconsolidated affiliates, net		12	$ 9.6	24.4	17.7
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Investment		840		840		849.8
Earnings from unconsolidated affiliates, net		7	6.6	12.7	12.6
Difference between carrying amount and underlying equity		51.4		51.4
Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
Investment		174		174		184.9
Earnings from unconsolidated affiliates, net		3.8	2.2	6.8	4
Difference between carrying amount and underlying equity		0.7		0.7
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investment		36.8		36.8		37.8
Earnings from unconsolidated affiliates, net		0	0.7	0.4	1.2
Difference between carrying amount and underlying equity		25.9		25.9
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Investment		8.7		8.7		8.5
Earnings from unconsolidated affiliates, net		0.5	0.5	1.1	0.5
Difference between carrying amount and underlying equity		6.1		6.1
Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investment		97.2		97.2		$ 102
Earnings from unconsolidated affiliates, net		0.7	$ (0.4)	3.4	$ (0.6)
Accounting Standards Update 2014-09 | Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
New Accounting Pronouncement, effect of adoption	$ 9.5
New Accounting Pronouncement, Equity Earnings Decrease		$ 3		$ 5

Investments in Unconsolidated37

Investments in Unconsolidated Affiliates Summarized Financial Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Schedule of Equity Method Investments [Line Items]
Operating Revenues	$ 178.4	$ 160.5
Operating Expenses	116.7	101.3
Net Income	64.5	59.2
Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
Amortization	0.1	0.1
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Operating Revenues	85.5	84
Operating Expenses	39.9	38
Net Income	45.6	46.1
Other Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Operating Revenues	92.9	76.5
Operating Expenses	76.8	63.3
Net Income	18.9	13.1
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Amortization	0.6	0.6
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Amortization	$ 0.3	$ 0.3

Investments in Unconsolidated38

Investments in Unconsolidated Affiliates Distributions and Contributions (Details) - USD ($) $ in Millions	Jun. 21, 2017	Jul. 31, 2018	Jun. 30, 2018	Jun. 30, 2017
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			$ 48.1	$ 39.3
Payments to acquire equity method investments			6.9	18.5
Payments to Acquire Equity Method Investments Cash and Noncash Consideration				87.9
Contribution of Property	$ 69.4
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			22.5	23.7
Payments to acquire equity method investments			0	0
Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			8.3	0
Payments to acquire equity method investments			0.1
Payments to Acquire Equity Method Investments Cash and Noncash Consideration				86.4
Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			15	12.3
Payments to acquire equity method investments			6.8	1.5
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			1.4	2.7
Payments to acquire equity method investments			0	0
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			0.9	0.6
Payments to acquire equity method investments			$ 0	$ 0
Subsequent Event | Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		$ 12.2
Subsequent Event | Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		2.3
Subsequent Event | Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		2.5
Payments to acquire equity method investments		2.5
Subsequent Event | Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		$ 0.5

Investments in Unconsolidated39

Investments in Unconsolidated Affiliates Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Estimated cost to build		$ 180
Payments to Acquire Property, Plant, and Equipment		$ 118.7	$ 88.7
Crestwood Permian Basin LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Business Combination, Contingent Consideration, Liability, Noncurrent				$ 57
Crestwood Equity Partners LP | Crestwood Permian Basin Holdings
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%
Crestwood Midstream Partners LP
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 118.7	$ 88.7
SWEPI LP | Crestwood Permian Basin Holdings
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 112.3
SWEPI LP | Crestwood Permian Basin LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%
Accounting Standards Update 2014-09 | Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
New Accounting Pronouncement, Equity Earnings Decrease	$ 3	$ 5

Risk Management (Notional Amoun

Risk Management (Notional Amounts and Terms of Company's Derivative Financial Instruments) (Details) bbl in Millions, Mcf in Millions	Jun. 30, 2018bblMcf	Dec. 31, 2017bblMcf
Propane Crude And Heating Oil | Fixed Price Payor
Derivative [Line Items]
Derivative, notional amount | bbl	11.6	15.3
Propane Crude And Heating Oil | Fixed Price Receiver
Derivative [Line Items]
Derivative, notional amount | bbl	13.8	17.5
Natural Gas [Member] | Fixed Price Payor
Derivative [Line Items]
Derivative, notional amount | Mcf	870	780
Natural Gas [Member] | Fixed Price Receiver
Derivative [Line Items]
Derivative, notional amount | Mcf	820	660

Risk Management (Narrative) (De

Risk Management (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Derivative [Line Items]
Derivative instruments not designated as hedging instruments, revenue	$ 33	$ 28	$ (130.8)	$ 73.1
Collateral posted for commodity derivative instruments	2.4		2.4		$ 3.7
Commodity contract
Derivative [Line Items]
Gain (loss) on derivative instruments not designated as hedging	6.4	$ 6.9	1.4	$ 1.5
Collateral posted for commodity derivative instruments	0.1		0.1		0.1
Commodity contract with credit contingent features
Derivative [Line Items]
Aggregate fair value of commodity derivative instruments	13.5		13.5		28.9
NYMEX Derivative Liability
Derivative [Line Items]
Derivative Asset	24.8		24.8		27.2
NYMEX Margin Deposit
Derivative [Line Items]
NYMEX margin deposits	$ 4.9		$ 4.9		$ 5.6
ERROR in label resolution. | Maximum
Derivative [Line Items]
Remaining maturity			36 months
Percent of contracts expiring in the next twelve months			91.00%

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Carrying Values and Estimated Fair Values of Senior Notes) (Details) - Crestwood Midstream Partners LP - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Senior Notes, 2023
Debt Instrument [Line Items]
Carrying amount	$ 692.9	$ 692.1
Fair value	713.8	728.8
Senior Notes, 2025
Debt Instrument [Line Items]
Carrying amount	492.8	492.3
Fair value	$ 500.4	$ 517.9

Fair Value Measurements (Assets

Fair Value Measurements (Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	$ 76.3	$ 103.3
SPH units	3.4	3.5
Assets, Fair Value Disclosure, Excluding Netting Adjustments	79.7	106.8
Netting agreements	(50.2)	(74.6)
Derivative Asset, Fair Value of Collateral	(20.1)	(21.5)
Assets from price risk management, total	6	7.2
Total assets at fair value	9.4	10.7
Liabilities from price risk management	71.1	119.6
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	71.1	119.6
Netting agreements	(50.2)	(74.6)
Derivative Liability, Fair Value of Collateral	2.1	3.9
Liabilities from price risk management, total	23	48.9
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	5.1	1.1
SPH units	3.4	3.5
Assets, Fair Value Disclosure, Excluding Netting Adjustments	8.5	4.6
Liabilities from price risk management	5.8	1.4
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	5.8	1.4
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	71.2	102.2
SPH units	0	0
Assets, Fair Value Disclosure, Excluding Netting Adjustments	71.2	102.2
Liabilities from price risk management	65.3	118.2
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	65.3	118.2
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	0	0
SPH units	0	0
Assets, Fair Value Disclosure, Excluding Netting Adjustments	0	0
Liabilities from price risk management	0	0
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	$ 0	$ 0

Long-Term Debt (Components Of L

Long-Term Debt (Components Of Long-Term Debt) (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017	Mar. 31, 2017
Debt Instrument [Line Items]
Deferred finance costs, net	$ 24,800,000	$ 28,400,000
Total debt	1,561,900,000	1,492,200,000
Less: current portion	900,000	900,000
Total long-term debt, less current portion	1,561,000,000	1,491,300,000
Senior Notes | Senior Notes, 2023
Debt Instrument [Line Items]
Senior notes	700,000,000	700,000,000
Senior Notes | Senior Notes, 2025
Debt Instrument [Line Items]
Senior notes	500,000,000	500,000,000	$ 500,000,000
Other
Debt Instrument [Line Items]
Other	1,700,000	2,400,000
Revolving Credit Facility | Crestwood Midstream Revolver
Debt Instrument [Line Items]
Credit agreement outstanding carrying value	385,000,000	318,200,000
Crestwood Midstream Partners LP
Debt Instrument [Line Items]
Less: current portion	900,000	900,000
Total long-term debt, less current portion	1,561,000,000	1,491,300,000
Crestwood Midstream Partners LP | Senior Notes, 2023
Debt Instrument [Line Items]
Senior notes	692,900,000	692,100,000
Crestwood Midstream Partners LP | Senior Notes, 2025
Debt Instrument [Line Items]
Senior notes	$ 492,800,000	$ 492,300,000

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2017USD ($)	Mar. 31, 2017USD ($)
Debt Instrument [Line Items]
Senior Secured Leverage Ratio	0.98		0.98
Loss on modification/extinguishment of debt	$ 0	$ 400,000	$ 0	$ 37,700,000
Senior Secured Leverage Ratio, maximum	3.75		3.75
Crestwood Midstream Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Additional Potential Capacity	$ 350,000,000		$ 350,000,000
Senior Notes, 2025 | Senior Notes
Debt Instrument [Line Items]
Senior notes	500,000,000		$ 500,000,000		$ 500,000,000	$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage						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	55,500,000		$ 55,500,000		52,200,000
Debt Instrument, Unused Borrowing Capacity, Amount	582,100,000		582,100,000
Credit agreement outstanding carrying value	$ 385,000,000		$ 385,000,000		$ 318,200,000
Total Funded Debt to Consolidated Ebitda			4.02
Consolidated Ebitda To Consolidated Interest Expense			4.37
Debt, Weighted Average Interest Rate	4.33%		4.33%		4.11%
Interest Coverage Ratio Minimum			2.50
Crestwood Midstream Revolver | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.26%		4.26%		3.94%
Crestwood Midstream Revolver | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	6.25%		6.25%		6.00%
Senior Notes, 2023 | Senior Notes
Debt Instrument [Line Items]
Senior notes	$ 700,000,000		$ 700,000,000		$ 700,000,000
Crestwood Midstream Partners LP | Senior Notes, 2025 | Senior Notes
Debt Instrument [Line Items]
Proceeds from Issuance of Debt				492,000,000
Crestwood Midstream Partners LP
Debt Instrument [Line Items]
Loss on modification/extinguishment of debt	0	$ 400,000	0	$ 37,700,000
Crestwood Midstream Partners LP | Senior Notes, 2025
Debt Instrument [Line Items]
Senior notes	492,800,000		492,800,000		492,300,000
Crestwood Midstream Partners LP | Senior Notes, 2023
Debt Instrument [Line Items]
Senior notes	$ 692,900,000		$ 692,900,000		$ 692,100,000

Earnings Per Limited Partner 46

Earnings Per Limited Partner Unit (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Preferred Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Units excluded from dilutive earnings per share	7,125,744	6,964,663	7,125,744	6,887,247
Preferred Units | Crestwood Niobrara LLC
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Units excluded from dilutive earnings per share	5,946,194	8,228,378	5,916,641	8,228,378
Performance Shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Units excluded from dilutive earnings per share	343,632	369,203	337,694	280,520
Subordinated Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Units excluded from dilutive earnings per share	438,789	438,789	438,789	438,789

Partners' Capital (Schedule of

Partners' Capital (Schedule of Partners' Capital Account, Distriubtions) (Details) - USD ($) $ / shares in Units, $ in Millions	May 15, 2018	May 08, 2018	Feb. 14, 2018	Feb. 07, 2018	May 15, 2017	May 08, 2017	Feb. 14, 2017	Feb. 07, 2017	Jun. 30, 2018	Jun. 30, 2017
Distribution Made to Limited Partner [Line Items]
Distribution Made to Limited Partner, Date of Record		May 8, 2018		Feb. 7, 2018		May 8, 2017		Feb. 7, 2017
Distribution Made to Limited Partner, Distribution Date	May 15, 2018		Feb. 14, 2018		May 15, 2017		Feb. 14, 2017
Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit	$ 0.60		$ 0.6		$ 0.60		$ 0.6
Distribution Made to Limited Partner, Cash Distributions Paid	$ 42.7		$ 42.7		$ 41.8		$ 41.8		$ 85.4	$ 83.6

Partners' Capital (Components o

Partners' Capital (Components of Net Income (Loss) Attributable to Non-Controlling Interests) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Distribution Made to Limited Partner [Line Items]
Payments of Ordinary Dividends, Noncontrolling Interest			$ 3.3	$ 7.6
Net income attributable to non-controlling partners in subsidiaries	$ (4)	$ (6.3)	(8)	(12.4)
Crestwood Midstream Partners LP
Distribution Made to Limited Partner [Line Items]
Net income attributable to non-controlling partners in subsidiaries	(4)	(6.3)	(8)	(12.4)
Crestwood Niobrara LLC
Distribution Made to Limited Partner [Line Items]
Payments of Ordinary Dividends, Noncontrolling Interest			3.3	7.6
Net income attributable to non-controlling partners in subsidiaries	$ 4	$ 6.3	$ 8	$ 12.4

Partners' Capital Schedule of U

Partners' Capital Schedule of Unit Issuances and Net Proceeds (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)shares
Statement of Partners' Capital [Abstract]
Equity Offering Program Authorized Amount | $	$ 250
Partners' Capital Account, Units, Sold in Public Offering | shares	0
Equity Distribution Program Management Fee Percentage	2.00%

Partners' Capital (Narrative) (

Partners' Capital (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions

Aug. 14, 2018

Aug. 07, 2018

Jul. 19, 2018

May 15, 2018

May 08, 2018

Feb. 14, 2018

Feb. 07, 2018

May 15, 2017

May 08, 2017

Feb. 14, 2017

Feb. 07, 2017

Jul. 31, 2018

Jun. 30, 2018

Jun. 30, 2017

Jun. 30, 2018

Jun. 30, 2017

Dec. 31, 2017

Distribution Made to Limited Partner [Line Items]

Distribution Made to Limited Partner, Distribution Date

May 15, 2018

Feb. 14, 2018

May 15, 2017

Feb. 14, 2017

Distribution Made to Limited Partner, Date of Record

May 8, 2018

Feb. 7, 2018

May 8, 2017

Feb. 7, 2017

Distributions to preferred unit holders

$ 30

$ 0

Preferred Units, Outstanding

71,257,445

71,257,445

71,257,445

Incentive Distribution, Distribution

$ 85.4

$ 83.6

Preferred Stock Dividends, Shares

3,113,215

Net Income (Loss) Attributable to Noncontrolling Interest

$ (4)

$ (6.3)

(8)

$ (12.4)

Dividends, Paid-in-kind

28.4

Payments of Ordinary Dividends, Noncontrolling Interest

3.3

7.6

Distribution Made to Limited Partner, Cash Distributions Paid

$ 42.7

$ 42.7

$ 41.8

$ 41.8

85.4

83.6

Crestwood Midstream Partners LP

Distribution Made to Limited Partner [Line Items]

Incentive Distribution, Distribution

123.3

94.5

Net Income (Loss) Attributable to Noncontrolling Interest

(4)

(6.3)

(8)

(12.4)

Distribution Made to General Partner, Cash Distributions Paid

120

86.9

Crestwood Niobrara LLC

Distribution Made to Limited Partner [Line Items]

Net Income (Loss) Attributable to Noncontrolling Interest

$ 4

$ 6.3

8

12.4

Payments of Ordinary Dividends, Noncontrolling Interest

3.3

$ 7.6

Non-Controlling Partners

Distribution Made to Limited Partner [Line Items]

Net Income (Loss) Attributable to Noncontrolling Interest

$ (8)

Subsequent Event

Distribution Made to Limited Partner [Line Items]

Distribution Made to Limited Partner, Distribution Date

Aug. 14, 2018

Distribution Made to Limited Partner, Date of Record

Aug. 7, 2018

Distributions to preferred unit holders

$ 15

Subsequent Event | Crestwood Niobrara LLC

Distribution Made to Limited Partner [Line Items]

Payments of Ordinary Dividends, Noncontrolling Interest

$ 3.3

Cash Distribution | Subsequent Event

Distribution Made to Limited Partner [Line Items]

Distribution Made to Limited Partner, Distributions Declared, Per Unit

$ 0.60

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Loss Contingency, Number of Plaintiffs	13
Self Insurance Reserve	$ 12.6	$ 13.6
Self Insurance Reserve Expected To Be Paid Subsequent To Next Fiscal Year	9.1
Loss Contingency Accrual, at Carrying Value	$ 1.2	2.1
Maximum
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Loss Contingency, Number of Plaintiffs	160
Crestwood Midstream Partners LP
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Self Insurance Reserve	$ 10.7	$ 11.6
Self Insurance Reserve Expected To Be Paid Subsequent To Next Fiscal Year	$ 7.6

Commitments and Contingencies E

Commitments and Contingencies Environmental Compliance (Details) $ in Thousands	Dec. 13, 2017USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2014Release	Dec. 31, 2017USD ($)bbl	Sep. 15, 2015USD ($)	May 31, 2015bbl
Site Contingency [Line Items]
Environmental Remediation Expense	$ 49
Estimated Environmental Costs	$ 173
Fort Berthold Indian Reservation
Site Contingency [Line Items]
Site Contingency, Loss Exposure, Number of Releases of Produced Water | Release			3
Site Contingency, Loss Exposure, Release of Produced Water | bbl				28,000		5,200
Accrual for Environmental Loss Contingencies		$ 1,700		$ 1,900
Maximum
Site Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss					$ 1,100
Maximum | Fort Berthold Indian Reservation
Site Contingency [Line Items]
Site Contingency, Loss Exposure in Excess of Accrual, Best Estimate		3,500
Minimum | Fort Berthold Indian Reservation
Site Contingency [Line Items]
Site Contingency, Loss Exposure in Excess of Accrual, Best Estimate		$ 1,700

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	$ 0.3	$ 0.4	$ 0.6	$ 0.9
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	7.3	5	14	9.8
Ascent Resources - Utica, LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP(1)	17		17
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP(1)	15.2		28.3
Affiliated Entity
Related Party Transaction [Line Items]
Related party receivables	3.4		3.4		$ 7.1
Revenues at CEQP and CMLP	0.3	0.4	0.6	0.9
Costs of product/services sold at CEQP and CMLP(1)	32.2	4	45.3	8.1
General and administrative expenses charged by CEQP to CMLP, net(3)	4.9	4.9	10.5	10.4
Related Party Transaction, Due from (to) Related Party [Abstract]
Accounts payable at CEQP	18.9		18.9		7.4
Crestwood Equity Partners LP
Related Party Transaction, Due from (to) Related Party [Abstract]
Related Party Transaction, (Income) Expenses from Transactions with Related Party	(4.4)	0.6	(4.8)	(0.2)
Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	0.3	0.4	0.6	0.9
Crestwood Midstream Partners LP | Affiliated Entity
Related Party Transaction [Line Items]
General and administrative expenses charged by CEQP to CMLP, net(3)	0.8	0.7	1.6	1.5
Related Party Transaction, Due from (to) Related Party [Abstract]
Accounts payable at CEQP	16.4		16.4		$ 5
Crestwood LTIP | Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Allocated Share-based Compensation Expense	5.7	5.6	12.1	11.9
Crestwood LTIP | Crestwood Holdings
Related Party Transaction [Line Items]
Allocated Share-based Compensation Expense	4.6	0.1	5.4	0.8
Stagecoach Gas Services LLC
Related Party Transaction [Line Items]
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	2.1	1.9	4.2	4.5
Tres Palacios Holdings LLC
Related Party Transaction [Line Items]
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	0.9	0.9	2	1.8
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	4.1	2.1	7.5	3.3
Jackalope Gas Gathering Services, L.L.C.
Related Party Transaction [Line Items]
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	$ 0.2	$ 0.1	$ 0.3	$ 0.2

Segments (Reconciliation of Net

Segments (Reconciliation of Net Income (Loss) to EBITDA) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)segment	Jun. 30, 2017USD ($)
Segment Reporting, Other Significant Reconciling Item [Line Items]
Number of Operating Segments | segment			3
Net income (loss)	$ (21.5)	$ 0.3	$ 12.6	$ (19.1)
Interest and debt expense, net	24.3	24.1	48.7	50.6
Loss on modification/extinguishment of debt	0	0.4	0	37.7
Benefit for income taxes	0.2	0	0.2	(0.1)
Depreciation, amortization and accretion	44.5	48.7	89.6	97.1
EBITDA	47.5	73.5	151.1	166.2
Crestwood Midstream Partners LP
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income (loss)	(23.5)	(1.9)	8.9	(23.3)
Interest and debt expense, net	24.3	24.1	48.7	50.6
Loss on modification/extinguishment of debt	0	0.4	0	37.7
Benefit for income taxes	0.1	0	0.1	(0.1)
Depreciation, amortization and accretion	47.4	51.4	95.2	102.6
EBITDA	$ 48.3	$ 74	$ 152.9	$ 167.5

Segments (Summary Of Segment In

Segments (Summary Of Segment Information) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)segment	Jun. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Net income (loss)	$ (21.5)	$ 0.3	$ 12.6	$ (19.1)
Interest and debt expense, net	24.3	24.1	48.7	50.6
Loss on modification/extinguishment of debt	0	0.4	$ 0	37.7
Number of Operating Segments | segment			3
Benefit for income taxes	0.2	0	$ 0.2	(0.1)
Depreciation, amortization and accretion	44.5	48.7	89.6	97.1
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	840.5	850.3	1,955.5	1,678.4
Intersegment Revenues	0	0	0	0
Costs of product/services sold	725.4	729.6	1,691.2	1,413.1
Operations and maintenance	31.9	34.2	66.4	67.9
General and administrative	23.4	22.7	47.3	49.1
Gain (loss) on long-lived assets	(24.4)	0	(24.1)	0
Earnings from unconsolidated affiliates, net	12	9.6	24.4	17.7
Other income, net	0.1	0.1	0.2	0.2
EBITDA	47.5	73.5	151.1	166.2
Goodwill	138.6		138.6		$ 147.6
Total assets	4,241.9		4,241.9		4,284.9
Gathering and Processing Operations
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	255.5	405.1	595.8	773.7
Intersegment Revenues	45.4	34.1	86.7	64.4
Costs of product/services sold	208.8	354.7	496.5	671.3
Operations and maintenance	17.8	18.2	35.5	35.6
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	0		0.1
Earnings from unconsolidated affiliates, net	4.5	1.8	10.2	3.4
Other income, net	0	0	0	0
EBITDA	78.8	68.1	160.8	134.6
Goodwill	45.9		45.9
Total assets	2,584.9		2,584.9
Storage and Transportation
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	5.1	8.5	9.3	18.5
Intersegment Revenues	2.5	1.7	4.5	3.5
Costs of product/services sold	0.1	0.1	0.2	0.1
Operations and maintenance	0.8	1.3	1.6	2.4
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	0		0
Earnings from unconsolidated affiliates, net	7.5	7.8	14.2	14.3
Other income, net	0	0	0	0
EBITDA	14.2	16.6	26.2	33.8
Goodwill	0		0
Total assets	1,025.6		1,025.6
Marketing Supply and Logistics
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	579.9	436.7	1,350.4	886.2
Intersegment Revenues	(47.9)	(35.8)	(91.2)	(67.9)
Costs of product/services sold	516.5	374.8	1,194.5	741.7
Operations and maintenance	13.3	14.7	29.3	29.9
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(24.4)		(24.2)
Earnings from unconsolidated affiliates, net	0	0	0	0
Other income, net	0	0	0	0
EBITDA	(22.2)	11.4	11.2	46.7
Goodwill	92.7		92.7		101.7
Total assets	600.3		600.3
Corporate
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	0	0	0	0
Intersegment Revenues	0	0	0	0
Costs of product/services sold	0	0	0	0
Operations and maintenance	0	0	0	0
General and administrative	23.4	22.7	47.3	49.1
Gain (loss) on long-lived assets	0		0
Earnings from unconsolidated affiliates, net	0	0	0	0
Other income, net	0.1	0.1	0.2	0.2
EBITDA	(23.3)	(22.6)	(47.1)	(48.9)
Goodwill	0		0
Total assets	31.1		31.1
Crestwood Midstream Partners LP
Net income (loss)	(23.5)	(1.9)	8.9	(23.3)
Interest and debt expense, net	24.3	24.1	48.7	50.6
Loss on modification/extinguishment of debt	0	0.4	0	37.7
Benefit for income taxes	0.1	0	0.1	(0.1)
Depreciation, amortization and accretion	47.4	51.4	95.2	102.6
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	840.5	850.3	1,955.5	1,678.4
Intersegment Revenues	0	0	0	0
Costs of product/services sold	725.4	729.6	1,691.2	1,413.1
Operations and maintenance	31.9	34.2	66.4	67.9
General and administrative	22.5	22.1	45.3	47.6
Gain (loss) on long-lived assets	(24.4)	0	(24.1)	0
Earnings from unconsolidated affiliates, net	12	9.6	24.4	17.7
EBITDA	48.3	74	152.9	167.5
Goodwill	138.6		138.6		147.6
Total assets	4,415.5		4,415.5		$ 4,466.3
Crestwood Midstream Partners LP | Gathering and Processing Operations
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	255.5	405.1	595.8	773.7
Intersegment Revenues	45.4	34.1	86.7	64.4
Costs of product/services sold	208.8	354.7	496.5	671.3
Operations and maintenance	17.8	18.2	35.5	35.6
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	0		0.1
Earnings from unconsolidated affiliates, net	4.5	1.8	10.2	3.4
EBITDA	78.8	68.1	160.8	134.6
Goodwill	45.9		45.9
Total assets	2,765.6		2,765.6
Crestwood Midstream Partners LP | Storage and Transportation
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	5.1	8.5	9.3	18.5
Intersegment Revenues	2.5	1.7	4.5	3.5
Costs of product/services sold	0.1	0.1	0.2	0.1
Operations and maintenance	0.8	1.3	1.6	2.4
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	0		0
Earnings from unconsolidated affiliates, net	7.5	7.8	14.2	14.3
EBITDA	14.2	16.6	26.2	33.8
Goodwill	0		0
Total assets	1,025.6		1,025.6
Crestwood Midstream Partners LP | Marketing Supply and Logistics
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	579.9	436.7	1,350.4	886.2
Intersegment Revenues	(47.9)	(35.8)	(91.2)	(67.9)
Costs of product/services sold	516.5	374.8	1,194.5	741.7
Operations and maintenance	13.3	14.7	29.3	29.9
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(24.4)		(24.2)
Earnings from unconsolidated affiliates, net	0	0	0	0
EBITDA	(22.2)	11.4	11.2	46.7
Goodwill	92.7		92.7
Total assets	600.3		600.3
Crestwood Midstream Partners LP | Corporate
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	0	0	0	0
Intersegment Revenues	0	0	0	0
Costs of product/services sold	0	0	0	0
Operations and maintenance	0	0	0	0
General and administrative	22.5	22.1	45.3	47.6
Gain (loss) on long-lived assets	0		0
Earnings from unconsolidated affiliates, net	0	0	0	0
EBITDA	(22.5)	$ (22.1)	(45.3)	$ (47.6)
Goodwill	0		0
Total assets	$ 24		$ 24

Segments (Narrative) (Details)

Segments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Interest, taxes, depreciation and amortization included in earnings from equity method investments	$ 9.9	$ 8.2	$ 19.6	$ 15.7

Segments Disaggregation of Reve

Segments Disaggregation of Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 840.5	$ 850.3	$ 1,955.5	$ 1,678.4
Other Revenue, Net	33		130.8
Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenues	255.5	405.1	595.8	773.7
Other Revenue, Net	0		0
Revenue including intersegment eliminations	300.9		682.5
Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenues	5.1	8.5	9.3	18.5
Other Revenue, Net	0		0
Revenue including intersegment eliminations	7.6		13.8
Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenues	579.9	$ 436.7	1,350.4	$ 886.2
Other Revenue, Net	33		130.8
Natural Gas Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	33.9		69.3
Natural Gas Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	33.9		69.3
Natural Gas Gathering | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Natural Gas Gathering | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Crude Oil Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9.4		18.6
Crude Oil Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9.4		18.6
Crude Oil Gathering | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Crude Oil Gathering | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Water Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13.7		25.8
Water Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13.7		25.8
Water Gathering | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Water Gathering | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Natural Gas Processing
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.7		5.4
Natural Gas Processing | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.7		5.4
Natural Gas Processing | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Natural Gas Processing | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Processing
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.4		4.1
NGL Processing | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Processing | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Processing | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.4		4.1
Natural Gas Compression
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7.9		15.5
Natural Gas Compression | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7.9		15.5
Natural Gas Compression | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Natural Gas Compression | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Crude Oil Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.3		2.2
Crude Oil Storage | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.4		0.9
Crude Oil Storage | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.2		1.8
Crude Oil Storage | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.3		5.5
NGL Storage | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Storage | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Storage | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.3		5.5
Crude Oil Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.9		1.6
Crude Oil Pipeline | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Crude Oil Pipeline | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.4		2.6
Crude Oil Pipeline | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Crude Oil Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.3		4.1
Crude Oil Transportation | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.6		1.2
Crude Oil Transportation | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Crude Oil Transportation | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.7		2.9
NGL Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9.7		19.4
NGL Transportation | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Transportation | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Transportation | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9.7		19.4
Water Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0.2
Water Transportation | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Water Transportation | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Water Transportation | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0.2
Crude Oil Rail Loading
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3.2		6.2
Crude Oil Rail Loading | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Crude Oil Rail Loading | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4.7		8.7
Crude Oil Rail Loading | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Rail Loading
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.1		2.2
NGL Rail Loading | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Rail Loading | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Rail Loading | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.1		2.2
Natural Gas Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	18		35.3
Natural Gas Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	11.9		25.3
Natural Gas Product Sales | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Natural Gas Product Sales | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	8.9		16.7
Crude Oil Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	426.7		864.9
Crude Oil Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	197.7		477.6
Crude Oil Product Sales | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Crude Oil Product Sales | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	266		456.6
NGL Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	271.9		744.2
NGL Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	22.7		42.9
NGL Product Sales | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
NGL Product Sales | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	254.8		712
Other revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.1		0.2
Other revenue | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Other revenue | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.3		0.7
Other revenue | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenues	(47.9)		(91.2)
Other Revenue, Net	0		0
Intersegment Eliminations | Natural Gas Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | Crude Oil Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | Water Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | Natural Gas Processing
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | NGL Processing
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | Natural Gas Compression
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | Crude Oil Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.3)		(0.5)
Intersegment Eliminations | NGL Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | Crude Oil Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.5)		(1)
Intersegment Eliminations | Crude Oil Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | NGL Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | Water Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | Crude Oil Rail Loading
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(1.5)		(2.5)
Intersegment Eliminations | NGL Rail Loading
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0		0
Intersegment Eliminations | Natural Gas Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(2.8)		(6.7)
Intersegment Eliminations | Crude Oil Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(37)		(69.3)
Intersegment Eliminations | NGL Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(5.6)		(10.7)
Intersegment Eliminations | Other revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.2)		(0.5)
Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	807.5		1,824.7
Revenue from Contract with Customer | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	300.9		682.5
Revenue from Contract with Customer | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7.6		13.8
Revenue from Contract with Customer | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	546.9		1,219.6
Revenue from Contract with Customer | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ (47.9)		$ (91.2)

Condensed Consolidating Finan58

Condensed Consolidating Financial Information (Balance Sheet) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash	$ 6.1	$ 1.3	$ 2.3	$ 1.6
Accounts receivable	326.6	442.7
Inventory	73.6	68.4
Total current assets	474.6	530.5
Property, plant and equipment, net	1,891.7	1,820.8
Investment	1,156.7	1,183
Other non-current assets	5.7	5.8
Total assets	4,241.9	4,284.9
Current liabilities:
Accounts payable	310.5	349.4
Total current liabilities	419.6	505.1
Long-term liabilities:
Long-term debt, less current portion	1,561	1,491.3
Other long-term liabilities	166.2	104.7
Deferred income taxes	3.1	3.3
Partners' capital	1,912.3	2,005.5
Interest of non-controlling partners in subsidiary	179.7	175
Total partners’ capital	2,092	2,180.5
Total liabilities and partners’ capital	4,241.9	4,284.9
Eliminations
Current assets:
Cash	0	0	0	0
Accounts receivable	0	0
Inventory	0	0
Other	0	0
Total current assets	0	0
Property, plant and equipment, net	0	0
Goodwill and intangible assets, net	0	0
Investment in consolidated affiliates	(3,670.6)	(3,705.4)
Investment	0	0
Other non-current assets	0	0
Total assets	(3,670.6)	(3,705.4)
Current liabilities:
Accounts payable	0	0
Other current liabilities	0	0
Total current liabilities	0	0
Long-term liabilities:
Long-term debt, less current portion	0	0
Other long-term liabilities	0	0
Deferred income taxes	0	0
Partners' capital	(3,670.6)	(3,705.4)
Interest of non-controlling partners in subsidiary	0	0
Total partners’ capital	(3,670.6)	(3,705.4)
Total liabilities and partners’ capital	(3,670.6)	(3,705.4)
Parent Company, Crestwood Midstream Partners, LP | Reportable Legal Entities
Current assets:
Cash	5.7	1	2	1.3
Accounts receivable	0	0
Inventory	0	0
Other	0	0
Total current assets	5.7	1
Property, plant and equipment, net	0	0
Goodwill and intangible assets, net	0	0
Investment in consolidated affiliates	3,670.6	3,705.4
Investment	0	0
Other non-current assets	0	0
Total assets	3,676.3	3,706.4
Current liabilities:
Accounts payable	0	0
Other current liabilities	20.7	20.5
Total current liabilities	20.7	20.5
Long-term liabilities:
Long-term debt, less current portion	1,561	1,490.5
Other long-term liabilities	0	0
Deferred income taxes	0	0
Partners' capital	2,094.6	2,195.4
Interest of non-controlling partners in subsidiary	0	0
Total partners’ capital	2,094.6	2,195.4
Total liabilities and partners’ capital	3,676.3	3,706.4
Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash	0	0	0	0
Accounts receivable	321.3	439.7
Inventory	73.6	68.4
Other	68.3	18.1
Total current assets	463.2	526.2
Property, plant and equipment, net	2,071.3	2,007.5
Goodwill and intangible assets, net	713.2	743.3
Investment in consolidated affiliates	0	0
Investment	0	0
Other non-current assets	2.4	2.4
Total assets	3,250.1	3,279.4
Current liabilities:
Accounts payable	307.8	346.8
Other current liabilities	87.4	134
Total current liabilities	395.2	480.8
Long-term liabilities:
Long-term debt, less current portion	0	0.8
Other long-term liabilities	106.7	45.6
Deferred income taxes	0.6	0.7
Partners' capital	2,747.6	2,751.5
Interest of non-controlling partners in subsidiary	0	0
Total partners’ capital	2,747.6	2,751.5
Total liabilities and partners’ capital	3,250.1	3,279.4
Non-Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash	0	0	0	0
Accounts receivable	3	2.9
Inventory	0	0
Other	0	0
Total current assets	3	2.9
Property, plant and equipment, net	0	0
Goodwill and intangible assets, net	0	0
Investment in consolidated affiliates	0	0
Investment	1,156.7	1,183
Other non-current assets	0	0
Total assets	1,159.7	1,185.9
Current liabilities:
Accounts payable	0	0
Other current liabilities	0	0
Total current liabilities	0	0
Long-term liabilities:
Long-term debt, less current portion	0	0
Other long-term liabilities	57	57
Deferred income taxes	0	0
Partners' capital	923	953.9
Interest of non-controlling partners in subsidiary	179.7	175
Total partners’ capital	1,102.7	1,128.9
Total liabilities and partners’ capital	1,159.7	1,185.9
Crestwood Midstream Partners LP
Current assets:
Cash	5.7	1	$ 2	$ 1.3
Accounts receivable	324.3	442.6
Inventory	73.6	68.4
Other	68.3	18.1
Total current assets	471.9	530.1
Property, plant and equipment, net	2,071.3	2,007.5
Goodwill and intangible assets, net	713.2	743.3
Investment in consolidated affiliates	0	0
Investment	1,156.7	1,183
Other non-current assets	2.4	2.4
Total assets	4,415.5	4,466.3
Current liabilities:
Accounts payable	307.8	346.8
Other current liabilities	108.1	154.5
Total current liabilities	415.9	501.3
Long-term liabilities:
Long-term debt, less current portion	1,561	1,491.3
Other long-term liabilities	163.7	102.6
Deferred income taxes	0.6	0.7
Partners' capital	2,094.6	2,195.4
Interest of non-controlling partners in subsidiary	179.7	175
Total partners’ capital	2,274.3	2,370.4
Total liabilities and partners’ capital	$ 4,415.5	$ 4,466.3

Condensed Consolidating Finan59

Condensed Consolidating Financial Information (Statements Of Operations) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues	$ 840.5	$ 850.3	$ 1,955.5	$ 1,678.4
Costs of product/services sold	725.4	729.6	1,691.2	1,413.1
Operating expenses and other:
Operations and maintenance	31.9	34.2	66.4	67.9
General and administrative	23.4	22.7	47.3	49.1
Depreciation, amortization and accretion	44.5	48.7	89.6	97.1
Total expenses	124.2	105.6	227.4	214.1
Loss on long-lived assets, net	24.4	0	24.1	0
Operating income (loss)	(9.1)	15.1	36.9	51.2
Earnings from unconsolidated affiliates, net	12	9.6	24.4	17.7
Interest and debt expense, net	(24.3)	(24.1)	(48.7)	(50.6)
Loss on modification/extinguishment of debt	0	(0.4)	0	(37.7)
Loss before income taxes	(21.3)	0.3	12.8	(19.2)
(Provision) benefit for income taxes	(0.2)	0	(0.2)	0.1
Net income (loss)	(21.5)	0.3	12.6	(19.1)
Net income attributable to non-controlling partners in subsidiaries	4	6.3	8	12.4
Net income (loss) attributable to parent	(25.5)	(6)	4.6	(31.5)
Eliminations
Revenues	0	0	0	0
Costs of product/services sold	0	0	0	0
Operating expenses and other:
Operations and maintenance	0	0	0	0
General and administrative	0	0	0	0
Depreciation, amortization and accretion	0	0	0	0
Total expenses	0	0	0	0
Loss on long-lived assets, net	0		0
Operating income (loss)	0	0	0	0
Earnings from unconsolidated affiliates, net	0	0	0	0
Interest and debt expense, net	0	0	0	0
Loss on modification/extinguishment of debt		0		0
Loss from unconsolidated affiliates	(8.9)	(32.9)	(77.3)	(87.5)
Loss before income taxes	(8.9)		(77.3)	(87.5)
(Provision) benefit for income taxes	0		0	0
Net income (loss)	(8.9)	(32.9)	(77.3)	(87.5)
Net income attributable to non-controlling partners in subsidiaries	0	0	0	0
Net income (loss) attributable to parent	(8.9)	(32.9)	(77.3)	(87.5)
Non-Guarantor Subsidiaries | Reportable Legal Entities
Revenues	0	0	0	0
Costs of product/services sold	0	0	0	0
Operating expenses and other:
Operations and maintenance	0	0	0	0
General and administrative	0	0	0	0
Depreciation, amortization and accretion	0	0	0	0
Total expenses	0	0	0	0
Loss on long-lived assets, net	0		0
Operating income (loss)	0	0	0	0
Earnings from unconsolidated affiliates, net	12	9.6	24.4	17.7
Interest and debt expense, net	0	0	0	0
Loss on modification/extinguishment of debt		0		0
Loss from unconsolidated affiliates	0	0	0	0
Loss before income taxes	12		24.4	17.7
(Provision) benefit for income taxes	0		0	0
Net income (loss)	12	9.6	24.4	17.7
Net income attributable to non-controlling partners in subsidiaries	4	6.3	8	12.4
Net income (loss) attributable to parent	8	3.3	16.4	5.3
Crestwood Midstream Partners LP
Revenues	840.5	850.3	1,955.5	1,678.4
Costs of product/services sold	725.4	729.6	1,691.2	1,413.1
Operating expenses and other:
Operations and maintenance	31.9	34.2	66.4	67.9
General and administrative	22.5	22.1	45.3	47.6
Depreciation, amortization and accretion	47.4	51.4	95.2	102.6
Total expenses	126.2	107.7	231	218.1
Loss on long-lived assets, net	24.4		24.1
Operating income (loss)	(11.1)	13	33.3	47.2
Earnings from unconsolidated affiliates, net	12	9.6	24.4	17.7
Interest and debt expense, net	(24.3)	(24.1)	(48.7)	(50.6)
Loss on modification/extinguishment of debt		(0.4)		(37.7)
Loss from unconsolidated affiliates	0	0	0	0
Loss before income taxes	(23.4)		9	(23.4)
(Provision) benefit for income taxes	(0.1)		(0.1)	0.1
Net income (loss)	(23.5)	(1.9)	8.9	(23.3)
Net income attributable to non-controlling partners in subsidiaries	4	6.3	8	12.4
Net income (loss) attributable to parent	(27.5)	(8.2)	0.9	(35.7)
Guarantor Subsidiaries | Reportable Legal Entities
Revenues	840.5	850.3	1,955.5	1,678.4
Costs of product/services sold	725.4	729.6	1,691.2	1,413.1
Operating expenses and other:
Operations and maintenance	31.9	34.2	66.4	67.9
General and administrative	10.4	5.5	17.6	12.7
Depreciation, amortization and accretion	47.4	51.4	95.2	102.6
Total expenses	114.1	91.1	203.3	183.2
Loss on long-lived assets, net	24.4		24.1
Operating income (loss)	1	29.6	61	82.1
Earnings from unconsolidated affiliates, net	0	0	0	0
Interest and debt expense, net	0	0	0	0
Loss on modification/extinguishment of debt		0		0
Loss from unconsolidated affiliates	0	0	0	0
Loss before income taxes	1		61	82.1
(Provision) benefit for income taxes	(0.1)		(0.1)	0.1
Net income (loss)	0.9	29.6	60.9	82.2
Net income attributable to non-controlling partners in subsidiaries	0	0	0	0
Net income (loss) attributable to parent	0.9	29.6	60.9	82.2
Parent Company, Crestwood Midstream Partners, LP | Reportable Legal Entities
Revenues	0	0	0	0
Costs of product/services sold	0	0	0	0
Operating expenses and other:
Operations and maintenance	0	0	0	0
General and administrative	12.1	16.6	27.7	34.9
Depreciation, amortization and accretion	0	0	0	0
Total expenses	12.1	16.6	27.7	34.9
Loss on long-lived assets, net	0		0
Operating income (loss)	(12.1)	(16.6)	(27.7)	(34.9)
Earnings from unconsolidated affiliates, net	0	0	0	0
Interest and debt expense, net	(24.3)	(24.1)	(48.7)	(50.6)
Loss on modification/extinguishment of debt		(0.4)		(37.7)
Loss from unconsolidated affiliates	8.9	32.9	77.3	87.5
Loss before income taxes	(27.5)		0.9	(35.7)
(Provision) benefit for income taxes	0		0	0
Net income (loss)	(27.5)	(8.2)	0.9	(35.7)
Net income attributable to non-controlling partners in subsidiaries	0	0	0	0
Net income (loss) attributable to parent	$ (27.5)	$ (8.2)	$ 0.9	$ (35.7)

Condensed Consolidating Finan60

Condensed Consolidating Financial Information (Statements Of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities	$ 160	$ 132.9
Cash flows from investing activities:
Purchases of property, plant and equipment	(118.7)	(88.7)
Investment in unconsolidated affiliates	(6.9)	(18.5)
Net proceeds from sale of assets	6.8	1
Proceeds from Equity Method Investment, Distribution, Return of Capital	23.9	21.1
Net cash used in investing activities	(94.9)	(85.1)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	847.1	1,680.4
Payments on long-term debt	(781)	(1,630.3)
Payments on capital leases	(0.7)	(1.3)
Payments for debt-related deferred costs	0	(1)
Distributions to partners	(85.4)	(83.6)
Taxes paid for unit-based compensation vesting	(6.9)	(3.6)
Other	(0.1)	(0.1)
Net cash provided by (used in) financing activities	(60.3)	(47.1)
Net change in cash	4.8	0.7
Cash at beginning of period	1.3	1.6
Cash at end of period	6.1	2.3
Eliminations
Cash flows from operating activities	0	0
Cash flows from investing activities:
Purchases of property, plant and equipment	0	0
Investment in unconsolidated affiliates	0	0
Net proceeds from sale of assets	0	0
Capital distributions from consolidated affiliates	(37.8)	(11.6)
Proceeds from Equity Method Investment, Distribution, Return of Capital	0	0
Net cash used in investing activities	(37.8)	(11.6)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0	0
Payments on long-term debt	0	0
Payments on capital leases	0	0
Payments for debt-related deferred costs		0
Distributions to partners	0	0
Contributions from (distributions to) parent	37.8	11.6
Taxes paid for unit-based compensation vesting	0	0
Change in intercompany balances	0	0
Net cash provided by (used in) financing activities	37.8	11.6
Net change in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	0	0
Non-Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities	24.1	16.6
Cash flows from investing activities:
Purchases of property, plant and equipment	0	0
Investment in unconsolidated affiliates	(6.9)	(18.5)
Net proceeds from sale of assets	0	0
Capital distributions from consolidated affiliates	0	0
Proceeds from Equity Method Investment, Distribution, Return of Capital	23.9	21.1
Net cash used in investing activities	17	2.6
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0	0
Payments on long-term debt	0	0
Payments on capital leases	0	0
Payments for debt-related deferred costs		0
Distributions to partners	(3.3)	(7.6)
Contributions from (distributions to) parent	(37.8)	(11.6)
Taxes paid for unit-based compensation vesting	0	0
Change in intercompany balances	0	0
Net cash provided by (used in) financing activities	(41.1)	(19.2)
Net change in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	0	0
Parent Company, Crestwood Midstream Partners, LP | Reportable Legal Entities
Cash flows from operating activities	(72.6)	(83.2)
Cash flows from investing activities:
Purchases of property, plant and equipment	(2.4)	(2.8)
Investment in unconsolidated affiliates	0	0
Net proceeds from sale of assets	0	0
Capital distributions from consolidated affiliates	37.8	11.6
Proceeds from Equity Method Investment, Distribution, Return of Capital	0	0
Net cash used in investing activities	35.4	8.8
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	847.1	1,680.4
Payments on long-term debt	(780.3)	(1,629.6)
Payments on capital leases	0	0
Payments for debt-related deferred costs		(1)
Distributions to partners	(120)	(86.9)
Contributions from (distributions to) parent	0	0
Taxes paid for unit-based compensation vesting	0	0
Change in intercompany balances	95.1	112.2
Net cash provided by (used in) financing activities	41.9	75.1
Net change in cash	4.7	0.7
Cash at beginning of period	1	1.3
Cash at end of period	5.7	2
Crestwood Midstream Partners LP
Cash flows from operating activities	164.4	136.1
Cash flows from investing activities:
Purchases of property, plant and equipment	(118.7)	(88.7)
Investment in unconsolidated affiliates	(6.9)	(18.5)
Net proceeds from sale of assets	6.8	1
Capital distributions from consolidated affiliates	0	0
Proceeds from Equity Method Investment, Distribution, Return of Capital	23.9	21.1
Net cash used in investing activities	(94.9)	(85.1)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	847.1	1,680.4
Payments on long-term debt	(781)	(1,630.3)
Payments on capital leases	(0.7)	(1.3)
Payments for debt-related deferred costs		(1)
Distributions to partners	(123.3)	(94.5)
Contributions from (distributions to) parent	0	0
Taxes paid for unit-based compensation vesting	(6.9)	(3.6)
Change in intercompany balances	0	0
Net cash provided by (used in) financing activities	(64.8)	(50.3)
Net change in cash	4.7	0.7
Cash at beginning of period	1	1.3
Cash at end of period	5.7	2
Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities	212.9	202.7
Cash flows from investing activities:
Purchases of property, plant and equipment	(116.3)	(85.9)
Investment in unconsolidated affiliates	0	0
Net proceeds from sale of assets	6.8	1
Capital distributions from consolidated affiliates	0	0
Proceeds from Equity Method Investment, Distribution, Return of Capital	0	0
Net cash used in investing activities	(109.5)	(84.9)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0	0
Payments on long-term debt	(0.7)	(0.7)
Payments on capital leases	(0.7)	(1.3)
Payments for debt-related deferred costs		0
Distributions to partners	0	0
Contributions from (distributions to) parent	0	0
Taxes paid for unit-based compensation vesting	(6.9)	(3.6)
Change in intercompany balances	(95.1)	(112.2)
Net cash provided by (used in) financing activities	(103.4)	(117.8)
Net change in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	$ 0	$ 0