Crestwood Equity Partners (CEQP+) 10-Q 1 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 29, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
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 Emerging Growth Company	false
Entity Small Business	false
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		71,220,170
Crestwood Midstream Partners LP
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Entity Registrant Name	Crestwood Midstream Partners LP
Entity Central Index Key	1,304,464
Current Fiscal Year End Date	--12-31
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		0

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash	$ 2.4	$ 1.3
Accounts receivable, less allowance for doubtful accounts of $0.3 million and $2.4 million at September 30, 2018 and December 31, 2017	352.3	442.7
Inventory	91.8	68.4
Assets from price risk management activities	7.6	7.2
Disposal Group, Including Discontinued Operation, Assets, Current	69.3	3
Prepaid expenses and other current assets	6.2	7.9
Total current assets	529.6	530.5
Property, plant and equipment	2,505.2	2,285.2
Less: accumulated depreciation and depletion	543.7	464.4
Property, plant and equipment, net	1,961.5	1,820.8
Intangible assets	770.3	788.8
Less: accumulated amortization	206.1	191.6
Intangible assets, net	564.2	597.2
Goodwill	138.6	147.6
Investments in unconsolidated affiliates	1,166.9	1,183
Other non-current assets	5.6	5.8
Total assets	4,366.4	4,284.9
Current liabilities:
Accounts payable	321.8	349.4
Accrued expenses and other liabilities	114.1	105.9
Liabilities from price risk management activities	43.5	48.9
Current portion of long-term debt	0.9	0.9
Total current liabilities	480.3	505.1
Long-term debt, less current portion	1,675.1	1,491.3
Other long-term liabilities	172	104.7
Deferred income taxes	3.1	3.3
Commitments and contingencies (Note 11)
Partners’ capital:
Crestwood Equity Partners LP partners’ capital (71,635,616 and 70,721,563 common and subordinated units issued and outstanding at September 30, 2018 and December 31, 2017)	1,243.4	1,393.5
Preferred units (71,257,445 units issued and outstanding at both September 30, 2018 and December 31, 2017)	612	612
Partners' capital	1,855.4	2,005.5
Interest of non-controlling partner in subsidiary	180.5	175
Total partners’ capital	2,035.9	2,180.5
Total liabilities and partners’ capital	4,366.4	4,284.9
Crestwood Midstream Partners LP
Assets
Cash	2	1
Accounts receivable, less allowance for doubtful accounts of $0.3 million and $2.4 million at September 30, 2018 and December 31, 2017	350	442.6
Inventory	91.8	68.4
Assets from price risk management activities	7.6	7.2
Disposal Group, Including Discontinued Operation, Assets, Current	69.3	3
Prepaid expenses and other current assets	6.2	7.9
Total current assets	526.9	530.1
Property, plant and equipment	2,835.2	2,615.3
Less: accumulated depreciation and depletion	697.7	607.8
Property, plant and equipment, net	2,137.5	2,007.5
Intangible assets	770.3	773.3
Less: accumulated amortization	206.1	177.6
Intangible assets, net	564.2	595.7
Goodwill	138.6	147.6
Investments in unconsolidated affiliates	1,166.9	1,183
Other non-current assets	2.3	2.4
Total assets	4,536.4	4,466.3
Current liabilities:
Accounts payable	319.2	346.8
Accrued expenses and other liabilities	113.2	104.7
Liabilities from price risk management activities	43.5	48.9
Current portion of long-term debt	0.9	0.9
Total current liabilities	476.8	501.3
Long-term debt, less current portion	1,675.1	1,491.3
Other long-term liabilities	169.4	102.6
Deferred income taxes	0.6	0.7
Partners’ capital:
Partners' capital	2,034	2,195.4
Interest of non-controlling partner in subsidiary	180.5	175
Total partners’ capital	2,214.5	2,370.4
Total liabilities and partners’ capital	$ 4,536.4	$ 4,466.3

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Allowance for doubtful accounts	$ 0.3	$ 2.4
Limited Partners' Capital Account, Units Issued	71,635,616	70,721,563
Limited Partners' Capital Account, Units Outstanding	71,635,616	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		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Revenues	$ 930.2	$ 955.6	$ 2,885.7	$ 2,634
Related party (Note 12)	0.3	0.5	0.9	1.4
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 12)	45.7	3.7	91	11.8
Total costs of product/services sold	827.5	858.5	2,518.7	2,271.6
Operating expenses and other:
Operations and maintenance	29.6	35.5	96	103.4
General and administrative	25.5	22.5	72.8	71.6
Depreciation, amortization and accretion	39.2	48.1	128.8	145.2
Loss on long-lived assets, net	3.6	6.3	27.7	6.3
Total expenses	97.9	112.4	325.3	326.5
Operating income (loss)	4.8	(15.3)	41.7	35.9
Earnings from unconsolidated affiliates, net	15.1	11.5	39.5	29.2
Interest and debt expense, net	(25.1)	(24.2)	(73.8)	(74.8)
Loss on modification/extinguishment of debt	0	0	0	(37.7)
Other income, net	0	0.2	0.2	0.4
Income (loss) before income taxes	(5.2)	(27.8)	7.6	(47)
Provision for income taxes	0	(0.1)	(0.2)	0
Net income (loss)	(5.2)	(27.9)	7.4	(47)
Net Income Attributable to Noncontrolling Interest	4.1	6.4	12.1	18.8
Net income (loss) attributable to parent	(9.3)	(34.3)	(4.7)	(65.8)
Net income attributable to preferred unit holders	15	16.2	45.1	47.5
Net loss attributable to partners	(24.3)	(50.5)	(49.8)	(113.3)
Common unitholders’ interest in net loss	$ (24.3)	$ (50.5)	$ (49.8)	$ (113.3)
Net loss per limited partner unit:
Basic (in dollars per share)	$ (0.34)	$ (0.72)	$ (0.70)	$ (1.63)
Diluted (in dollars per share)	$ (0.34)	$ (0.72)	$ (0.70)	$ (1.63)
Weighted-average limited partners’ units outstanding (in thousands):
Basic (units)	71,212	69,725	71,201	69,692
Dilutive units (units)	0	0	0	0
Diluted (units)	71,212	69,725	71,201	69,692
Crestwood Midstream Partners LP
Revenues:
Revenues	$ 930.2	$ 955.6	$ 2,885.7	$ 2,634
Related party (Note 12)	0.3	0.5	0.9	1.4
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 12)	45.7	3.7	91	11.8
Total costs of product/services sold	827.5	858.5	2,518.7	2,271.6
Operating expenses and other:
Operations and maintenance	29.6	35.5	96	103.4
General and administrative	24.6	21.4	69.9	69
Depreciation, amortization and accretion	42.7	50.9	137.9	153.5
Loss on long-lived assets, net	3.6	6.3	27.7	6.3
Total expenses	100.5	114.1	331.5	332.2
Operating income (loss)	2.2	(17)	35.5	30.2
Earnings from unconsolidated affiliates, net	15.1	11.5	39.5	29.2
Interest and debt expense, net	(25.1)	(24.2)	(73.8)	(74.8)
Loss on modification/extinguishment of debt	0	0	0	(37.7)
Income (loss) before income taxes	(7.8)	(29.7)	1.2	(53.1)
Provision for income taxes	0	(0.1)	(0.1)	0
Net income (loss)	(7.8)	(29.8)	1.1	(53.1)
Net Income Attributable to Noncontrolling Interest	4.1	6.4	12.1	18.8
Net income (loss) attributable to parent	(11.9)	(36.2)	(11)	(71.9)
Product
Revenues:
Revenues	845	855.3	2,620.2	2,325.4
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	770.8	843.3	2,391.5	2,223.7
Product | Crestwood Midstream Partners LP
Revenues:
Revenues	845	855.3	2,620.2	2,325.4
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	770.8	843.3	2,391.5	2,223.7
Service
Revenues:
Revenues	85.2	100.3	265.5	308.6
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	11	11.5	36.2	36.1
Service | Crestwood Midstream Partners LP
Revenues:
Revenues	85.2	100.3	265.5	308.6
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	11	11.5	36.2	36.1
Gathering and Processing Segment
Revenues:
Revenues	242.3	434.4	838.1	1,208.1
Costs of product/services sold (exclusive of items shown separately below):
Total costs of product/services sold	205.1	378.6	701.6	1,049.9
Operating expenses and other:
Operations and maintenance	17.2	16.2	52.7	51.8
General and administrative	0	0	0	0
Loss on long-lived assets, net	2.2	3.9	2.1	3.9
Earnings from unconsolidated affiliates, net	5.6	4.3	15.8	7.7
Gathering and Processing Segment | Crestwood Midstream Partners LP
Revenues:
Revenues	242.3	434.4	838.1	1,208.1
Costs of product/services sold (exclusive of items shown separately below):
Total costs of product/services sold	205.1	378.6	701.6	1,049.9
Operating expenses and other:
Operations and maintenance	17.2	16.2	52.7	51.8
General and administrative	0	0	0	0
Loss on long-lived assets, net	2.2	3.9	2.1	3.9
Earnings from unconsolidated affiliates, net	5.6	4.3	15.8	7.7
Gathering and Processing Segment | Product
Revenues:
Revenues	173.5	353.3	632.6	971.7
Gathering and Processing Segment | Product | Crestwood Midstream Partners LP
Revenues:
Revenues	173.5	353.3	632.6	971.7
Gathering and Processing Segment | Service
Revenues:
Revenues	68.8	80.6	205.4	235
Gathering and Processing Segment | Service | Crestwood Midstream Partners LP
Revenues:
Revenues	68.8	80.6	205.4	235
Marketing Supply and Logistics
Revenues:
Revenues	684.4	515	2,034.8	1,401.2
Costs of product/services sold (exclusive of items shown separately below):
Total costs of product/services sold	622.5	479.7	1,817	1,221.4
Operating expenses and other:
Operations and maintenance	11.7	18.3	41	48.2
General and administrative	0	0	0	0
Loss on long-lived assets, net	2.5	(0.6)	26.7	(0.6)
Earnings from unconsolidated affiliates, net	0	0	0	0
Marketing Supply and Logistics | Crestwood Midstream Partners LP
Revenues:
Revenues	684.4	515	2,034.8	1,401.2
Costs of product/services sold (exclusive of items shown separately below):
Total costs of product/services sold	622.5	479.7	1,817	1,221.4
Operating expenses and other:
Operations and maintenance	11.7	18.3	41	48.2
General and administrative	0	0	0	0
Loss on long-lived assets, net	2.5	(0.6)	26.7	(0.6)
Earnings from unconsolidated affiliates, net	0	0	0	0
Marketing Supply and Logistics | Product
Revenues:
Revenues	671.5	502	1,987.6	1,353.7
Marketing Supply and Logistics | Product | Crestwood Midstream Partners LP
Revenues:
Revenues	671.5	502	1,987.6	1,353.7
Marketing Supply and Logistics | Service
Revenues:
Revenues	12.6	13	46.4	47.5
Marketing Supply and Logistics | Service | Crestwood Midstream Partners LP
Revenues:
Revenues	12.6	13	46.4	47.5
Storage and Transportation
Revenues:
Revenues	3.5	6.2	12.8	24.7
Costs of product/services sold (exclusive of items shown separately below):
Total costs of product/services sold	(0.1)	0.2	0.1	0.3
Operating expenses and other:
Operations and maintenance	0.7	1	2.3	3.4
General and administrative	0	0	0	0
Loss on long-lived assets, net	0	0	0	0
Earnings from unconsolidated affiliates, net	9.5	7.2	23.7	21.5
Storage and Transportation | Crestwood Midstream Partners LP
Revenues:
Revenues	3.5	6.2	12.8	24.7
Costs of product/services sold (exclusive of items shown separately below):
Total costs of product/services sold	(0.1)	0.2	0.1	0.3
Operating expenses and other:
Operations and maintenance	0.7	1	2.3	3.4
General and administrative	0	0	0	0
Loss on long-lived assets, net	0	0	0	0
Earnings from unconsolidated affiliates, net	9.5	7.2	23.7	21.5
Storage and Transportation | Service
Revenues:
Revenues	3.5	6.2	12.8	24.7
Storage and Transportation | Service | Crestwood Midstream Partners LP
Revenues:
Revenues	$ 3.5	$ 6.2	$ 12.8	$ 24.7

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (5.2)	$ (27.9)	$ 7.4	$ (47)
Change in fair value of Suburban Propane Partners, L.P. units	0	0.3	(0.1)	(0.6)
Comprehensive income (loss)	(5.2)	(27.6)	7.3	(47.6)
Comprehensive income attributable to non-controlling partner	4.1	6.4	12.1	18.8
Comprehensive loss attributable to Crestwood Equity Partners LP	$ (9.3)	$ (34)	$ (4.8)	$ (66.4)

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		(45)	(128.1)	(6.6)	(179.7)		(179)	(6.6)	(185.6)
Distributions to partners (in shares)										0
Unit-based compensation charges		0	27.9	0	27.9		27.9	0	27.9
Unit-based compensation charges (in shares)											1,100,000
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)	(0.6)	0	(0.7)		0.1	0	0.1
Net income attributable to preferred unit holders	45.1	45.1
Net loss attributable to partners	(49.8)		(49.8)
Net Income Attributable to Noncontrolling Interest	12.1			12.1		12.1
Net income (loss)	7.4				7.4	1.1	(11)		1.1
Balance at September 30, 2018 at Sep. 30, 2018	$ 1,855.4	612	1,243.4	180.5	2,035.9	$ 2,034	2,034	180.5	2,214.5
Common Unit, Outstanding											71,200,000	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	$ 0	$ 7.5		$ 7.5	$ 0	$ 7.5

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities
Net income (loss)	$ 7.4	$ (47)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	128.8	145.2
Amortization of debt-related deferred costs	5.4	5.4
Unit-based compensation charges	27.9	18.9
Loss on long-lived assets, net	27.7	6.3
Loss on modification/extinguishment of debt	0	37.7
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	(0.3)	(2.5)
Deferred income taxes	(0.2)	(0.7)
Other	0.2	(0.3)
Changes in operating assets and liabilities	4	65.2
Net cash provided by operating activities	200.9	228.2
Investing activities
Purchases of property, plant and equipment	(205.7)	(134.4)
Investment in unconsolidated affiliates	(27.7)	(46.5)
Capital distributions from unconsolidated affiliates	34.6	35.3
Net proceeds from sale of assets	8.6	1.3
Net cash used in investing activities	(190.2)	(144.3)
Financing activities
Proceeds from the issuance of long-term debt	1,152.1	2,209.8
Payments on long-term debt	(973.7)	(2,159.2)
Payments on capital leases	(1.1)	(2.2)
Payments for debt-related deferred costs	0	(1)
Distributions to partners	(128.1)	(125.4)
Distributions to non-controlling partner	(6.6)	(11.4)
Distribution to preferred unit holders	(45)	0
Issuance of common units	0	10.6
Taxes paid for unit-based compensation vesting	(6.9)	(5.3)
Other	(0.3)	0
Net cash provided by (used in) financing activities	(9.6)	(84.1)
Net change in cash	1.1	(0.2)
Cash at beginning of period	1.3	1.6
Cash at end of period	2.4	1.4
Supplemental schedule of noncash investing and financing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	(1.6)	(15.4)
Crestwood Midstream Partners LP
Operating activities
Net income (loss)	1.1	(53.1)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	137.9	153.5
Amortization of debt-related deferred costs	5.4	5.4
Unit-based compensation charges	27.9	18.9
Loss on long-lived assets, net	27.7	6.3
Loss on modification/extinguishment of debt	0	37.7
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	(0.3)	(2.5)
Deferred income taxes	(0.1)	0.1
Other	0.2	(0.3)
Changes in operating assets and liabilities	6.6	66.9
Net cash provided by operating activities	206.4	232.9
Investing activities
Purchases of property, plant and equipment	(205.7)	(134.4)
Investment in unconsolidated affiliates	(27.7)	(46.5)
Capital distributions from unconsolidated affiliates	34.6	35.3
Net proceeds from sale of assets	8.6	1.3
Net cash used in investing activities	(190.2)	(144.3)
Financing activities
Proceeds from the issuance of long-term debt	1,152.1	2,209.8
Payments on long-term debt	(973.7)	(2,159.2)
Payments on capital leases	(1.1)	(2.2)
Payments for debt-related deferred costs	0	(1)
Distributions to partners	(185.6)	(130.9)
Taxes paid for unit-based compensation vesting	(6.9)	(5.3)
Net cash provided by (used in) financing activities	(15.2)	(88.8)
Net change in cash	1	(0.2)
Cash at beginning of period	1	1.3
Cash at end of period	2	1.1
Supplemental schedule of noncash investing and financing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	$ (1.6)	$ (15.4)

Organization and Business Descr

Organization and Business Description	9 Months Ended
	Sep. 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 September 30, 2018 , and for the three and nine months ended September 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	9 Months Ended
	Sep. 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 nine months ended September 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 September 30, 2018 (in millions) : Remainder of 2018 $ 12.2 2019 27.7 2020 23.5 2021 9.4 2022 7.3 Thereafter 10.6 Total $ 90.7 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 $323.8 million for both CEQP and CMLP at September 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 13 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 September 30, 2018 Contract Assets (Non-current) $ 1.1 $ 1.0 Contract Liabilities (Current) (1) 12.2 12.7 Contract Liabilities (Non-current) (2) 60.6 64.2 (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 nine months ended September 30, 2018 , we recognized revenues of approximately $3.1 million and $9.3 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 September 30, 2018 Nine Months Ended September 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) $ 173.5 $ 442.7 $ (269.2 ) $ 632.6 $ 1,309.6 $ (677.0 ) Service revenues: Gathering and processing (1)(2) 68.8 78.8 (10.0 ) 205.4 236.7 (31.3 ) Marketing, supply and logistics (3) 12.6 12.3 0.3 46.4 45.6 0.8 Costs of product/services sold: Product costs (1) 770.8 1,052.9 (282.1 ) 2,391.5 3,108.4 (716.9 ) Depreciation, amortization and accretion (2) 39.2 38.0 1.2 128.8 125.1 3.7 Earnings from unconsolidated affiliates, net (4) 15.1 17.4 (2.3 ) 39.5 46.8 (7.3 ) Net income (loss) (5.2 ) (4.9 ) (0.3 ) 7.4 9.0 (1.6 ) September 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,505.2 $ 2,391.7 $ 113.5 Accumulated depreciation and depletion (2) 543.7 527.8 15.9 Investments in unconsolidated affiliates (4) 1,166.9 1,183.7 (16.8 ) Liabilities: Accrued expenses and other liabilities (2)(3) 114.1 102.5 11.6 Other long-term liabilities (2)(3) 172.0 108.6 63.4 Partners’ capital: Crestwood Equity Partners LP partners’ capital (2)(3)(4) 1,243.4 1,237.5 5.9 Crestwood Midstream Three Months Ended September 30, 2018 Nine Months Ended September 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) $ 173.5 $ 442.7 $ (269.2 ) $ 632.6 $ 1,309.6 $ (677.0 ) Service revenues: Gathering and processing (1)(2) 68.8 78.8 (10.0 ) 205.4 236.7 (31.3 ) Marketing, supply and logistics (3) 12.6 12.3 0.3 46.4 45.6 0.8 Costs of product/services sold: Product costs (1) 770.8 1,052.9 (282.1 ) 2,391.5 3,108.4 (716.9 ) Depreciation, amortization and accretion (2) 42.7 41.5 1.2 137.9 134.2 3.7 Earnings from unconsolidated affiliates, net (4) 15.1 17.4 (2.3 ) 39.5 46.8 (7.3 ) Net income (loss) (7.8 ) (7.5 ) (0.3 ) 1.1 2.7 (1.6 ) September 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,835.2 $ 2,721.7 $ 113.5 Accumulated depreciation and depletion (2) 697.7 681.8 15.9 Investments in unconsolidated affiliates (4) 1,166.9 1,183.7 (16.8 ) Liabilities: Accrued expenses and other liabilities (2)(3) 113.2 101.6 11.6 Other long-term liabilities (2)(3) 169.4 106.0 63.4 Partners’ capital (2)(3)(4) 2,034.0 2,028.1 5.9 (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 $2.3 million and $7.3 million during the three and nine months ended September 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 September 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. We will adopt the provisions of the standard effective January 1, 2019 using the modified retrospective method. As allowed for in the standard, upon adoption we currently anticipate that we will not reassess the current GAAP classification of leases, easements and rights of way that exist as of December 31, 2018, and will not utilize the hindsight method in determining the assets and liabilities to be recorded for our existing leases on 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	9 Months Ended
	Sep. 30, 2018
Assets Held for Sale [Abstract]
Disclosure of Long Lived Assets Held-for-sale	Assets Held for Sale In October 2018, we sold our West Coast facilities included in our Marketing, Supply and Logistics segment to a third party for approximately $70 million . For a further description of these assets, see our 2017 Annual Report on Form 10-K. We recorded a $69.3 million current asset held for sale at September 30, 2018 related to the fair value of the facilities 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 $2.4 million and $26.9 million (including the goodwill impairment discussed further below) during the three and nine months ended September 30, 2018 based on the difference between the carrying value of West Coast’s current assets and liabilities, goodwill and its $61.8 million of property, plant and equipment, net and the fair value of the assets held for sale at September 30, 2018. We expect to receive the proceeds from the sale during the fourth 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 September 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 nine months ended September 30, 2018 .

Certain Balance Sheet Informati

Certain Balance Sheet Information	9 Months Ended
	Sep. 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 September 30, December 31, September 30, December 31, 2018 2017 2018 2017 Accrued expenses $ 38.8 $ 56.6 $ 37.9 $ 55.5 Accrued property taxes 4.8 4.8 4.8 4.8 Income tax payable 0.2 0.3 0.2 0.3 Interest payable 38.6 20.3 38.6 20.3 Accrued additions to property, plant and equipment 16.6 22.3 16.6 22.2 Capital leases 2.4 1.0 2.4 1.0 Deferred revenue 12.7 0.6 12.7 0.6 Total accrued expenses and other liabilities $ 114.1 $ 105.9 $ 113.2 $ 104.7

Investments in Unconsolidated A

Investments in Unconsolidated Affiliates	9 Months Ended
	Sep. 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 September 30, December 31, Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 2018 2017 Stagecoach Gas Services LLC (1) $ 836.6 $ 849.8 $ 8.8 $ 6.4 $ 21.5 $ 19.0 Jackalope Gas Gathering Services, L.L.C. (2)(6) 181.1 184.9 4.5 1.5 11.3 5.5 Crestwood Permian Basin Holdings LLC (3) 103.5 102.0 1.1 2.8 4.5 2.2 Tres Palacios Holdings LLC (4) 36.9 37.8 0.1 0.3 0.5 1.5 Powder River Basin Industrial Complex, LLC (5) 8.8 8.5 0.6 0.5 1.7 1.0 Total $ 1,166.9 $ 1,183.0 $ 15.1 $ 11.5 $ 39.5 $ 29.2 (1) As of September 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. Pursuant to the Stagecoach limited liability company agreement, our share of Stagecoach’s equity earnings increased from 35% to 40% effective July 1, 2018, Our Stagecoach Gas investment is included in our storage and transportation segment. (2) As of September 30, 2018 , our equity in the underlying net assets of Jackalope exceeded our investment balance by approximately $0.4 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. Pursuant to the Crestwood Permian limited liability company agreement, we were allocated 100% of Crestwood New Mexico’s earnings through June 30, 2018. Effective July 1, 2018, our equity earnings from Crestwood New Mexico is based on our ownership percentage of Crestwood Permian, which is currently 50% . Our Crestwood Permian investment is included in our gathering and processing segment. (4) As of September 30, 2018 , our equity in the underlying net assets of Tres Palacios Holdings LLC (Tres Holdings) exceeded our investment balance by approximately $25.6 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 September 30, 2018 , our equity in the underlying net assets of Powder River Basin Industrial Complex, LLC (PRBIC) exceeded our investment balance by approximately $6.0 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 $2.3 million and $7.3 million during the three and nine months ended September 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 ): Nine Months Ended September 30, 2018 2017 Operating Revenues Operating Expenses Net Income Operating Revenues Operating Expenses Net Income Stagecoach Gas $ 129.3 $ 59.1 $ 70.2 $ 127.1 $ 58.4 $ 68.8 Other (1) 114.0 101.4 16.4 124.6 103.7 20.8 Total $ 243.3 $ 160.5 $ 86.6 $ 251.7 $ 162.1 $ 89.6 (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 nine months ended September 30, 2018 and 2017 . We recorded amortization of the excess basis in our Tres Holdings equity investment of approximately $0.9 million for both the nine months ended September 30, 2018 and 2017 . We recorded amortization of the excess basis in our PRBIC equity investment of approximately $0.4 million and $0.5 million for the nine months ended September 30, 2018 and 2017 . Distributions and Contributions The following table summarizes our distributions and contributions from our unconsolidated affiliates (in millions) : Distributions (1) Contributions Nine Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Stagecoach Gas $ 34.7 $ 35.7 $ — $ — Jackalope 23.2 19.4 17.6 2.9 Crestwood Permian (2) 10.6 — 7.6 113.0 Tres Holdings 3.9 5.8 2.5 — PRBIC 1.4 1.1 — — Total $ 73.8 $ 62.0 $ 27.7 $ 115.9 (1) In October 2018, we received cash distributions from Stagecoach Gas, Crestwood Permian and Tres Holdings of approximately $13.9 million , $4.1 million and $1.4 million , respectively. (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 September 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 $129.5 million has been spent through September 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 September 30, 2018 and December 31, 2017 .

Risk Management

Risk Management	9 Months Ended
	Sep. 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 commodities 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 costs of product sold in our consolidated statements of operations. The following table summarizes the impact to our consolidated statements of operations related to our commodity-based derivatives reflected in costs of product/services sold and operating revenues during the three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Loss reflected in costs of product/services sold $ (16.7 ) $ (24.1 ) $ (15.3 ) $ (22.6 ) Product revenues 79.9 36.4 210.7 109.5 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: September 30, 2018 December 31, 2017 Fixed Price Payor Fixed Price Receiver Fixed Price Payor Fixed Price Receiver Propane, crude and heating oil (MMBbls) 17.6 20.7 15.3 17.5 Natural gas (MMcf) 1,760 1,730 780 660 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 September 30, 2018 and December 31, 2017 was $22.9 million and $28.9 million . At both September 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 September 30, 2018 and December 31, 2017 , we had a NYMEX related net derivative asset position of $23.1 million and $27.2 million , for which we posted $5.2 million and $5.6 million of cash collateral in the normal course of business. At September 30, 2018 and December 31, 2017 , we also received collateral of $5.7 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	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [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 September 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 September 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 ): September 30, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value 2023 Senior Notes $ 693.2 $ 725.0 $ 692.1 $ 728.8 2025 Senior Notes $ 493.1 $ 511.8 $ 492.3 $ 517.9 Financial Assets and Liabilities As of September 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 September 30, 2018 and December 31, 2017 ( in millions ): September 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 $ 5.2 $ 107.2 $ — $ 112.4 $ (86.7 ) $ (18.1 ) $ 7.6 Suburban Propane Partners, L.P. units (2) 3.4 — — 3.4 — — 3.4 Total assets at fair value $ 8.6 $ 107.2 $ — $ 115.8 $ (86.7 ) $ (18.1 ) $ 11.0 Liabilities Liabilities from price risk management $ 5.4 $ 119.3 $ — $ 124.7 $ (86.7 ) $ 5.5 $ 43.5 Total liabilities at fair value $ 5.4 $ 119.3 $ — $ 124.7 $ (86.7 ) $ 5.5 $ 43.5 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	9 Months Ended
	Sep. 30, 2018
Text Block [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt consisted of the following at September 30, 2018 and December 31, 2017 ( in millions ): September 30, December 31, Credit Facility $ 497.5 $ 318.2 2023 Senior Notes 700.0 700.0 2025 Senior Notes 500.0 500.0 Other 1.5 2.4 Less: deferred financing costs, net 23.0 28.4 Total debt 1,676.0 1,492.2 Less: current portion 0.9 0.9 Total long-term debt, less current portion $ 1,675.1 $ 1,491.3 Credit Facility At September 30, 2018 , Crestwood Midstream had $526.1 million of available capacity under its credit facility considering the most restrictive debt covenants in its credit agreement. At September 30, 2018 and December 31, 2017 , Crestwood Midstream’s outstanding standby letters of credit were $78.0 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 4.62% and 6.75% at September 30, 2018 and 3.94% and 6.00% at December 31, 2017 . The weighted-average interest rate as of September 30, 2018 and December 31, 2017 was 4.72% 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 September 30, 2018 , the net debt to consolidated EBITDA ratio was approximately 4.20 to 1.0, the consolidated EBITDA to consolidated interest expense ratio was approximately 4.34 to 1.0, and the senior secured leverage ratio was 1.23 to 1.0. At September 30, 2018 , Crestwood Midstream was in compliance with all of its debt covenants applicable to its credit facility. In October 2018, Crestwood Midstream entered into a Second Amended and Restated Credit Agreement (the Second Amended Credit Agreement). The Second Amended Credit Agreement provides for a five -year $1.25 billion revolving credit facility, which expires in October 2023 and is available to fund acquisitions, working capital and internal growth projects and for general partnership purposes. Borrowings under the Second Amended Credit Agreement (other than swing line loans) bear interest at either: • the Alternate Base Rate, which is defined as the highest of (i) the federal funds rate plus 0.50% per annum; (ii) Wells Fargo prime rate; or (iii) the Eurodollar Rate adjusted for certain reserve requirements plus 1% per annum; plus a margin varying from 0.50% to 1.50% per annum depending on Crestwood Midstream’s most recent consolidated total leverage ratio; or • the Eurodollar Rate adjusted for certain reserve requirements plus a margin varying from 1.50% to 2.50% per annum depending on Crestwood Midstream’s most recent consolidated total leverage ratio. The debt covenants under the Second Amended Credit Agreement are materially consistent with the credit facility that existed at September 30, 2018. 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 nine months ended September 30, 2017 , we recognized a loss on extinguishment of debt of approximately $37.7 million in conjunction with the tender of principal amounts of certain of Crestwood Midstream’s senior notes. At September 30, 2018 , Crestwood Midstream was in compliance with all of its debt covenants applicable to its senior notes.

Earnings Per Limited Partner Un

Earnings Per Limited Partner Unit	9 Months Ended
	Sep. 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. The following table summarizes information regarding the weighted-average of common units excluded during the three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Preferred units (1) 7,125,744 7,125,744 7,125,744 6,968,210 Crestwood Niobrara’s preferred units (1) 5,112,277 7,277,340 5,080,952 7,277,340 Performance units (2) 335,856 355,934 341,012 305,934 Subordinated units (2) 438,789 438,789 438,789 438,789 (1) See Note 10 for additional information regarding the potential conversion of our preferred units and Crestwood Niobrara’s preferred units to common units. (2) For a description of our subordinated and performance units, see our 2017 Annual Report on Form 10-K.

Partners' Capital

Partners' Capital	9 Months Ended
	Sep. 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 Equity Distribution Agreement. 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 nine months ended September 30, 2018. During the nine months ended September 30, 2017, we issued 437,518 common units under the ATM equity distribution program for net proceeds of approximately $10.6 million . We paid a manager fee of approximately $0.2 million during the nine months ended September 30, 2017 related to the sale of the common units. Employee Unit Purchase Plan. In August 2018, the board of directors of our general partner approved an employee unit purchase plan under which employees of the general partner may purchase our common units through payroll deductions up to a maximum of 10% of the employees’ eligible compensation, not to exceed $25,000 for any calendar year. Under the plan, we anticipate purchasing our common units on the open market for the benefit of participating employees based on their payroll deductions. In addition, we may match up to 10% of participating employees’ payroll deductions to purchase additional Crestwood common units for participating employees. The board of directors of our general partner authorized 1,500,000 common units (subject to adjustment as provided in the employee unit purchase plan) to be available for purchase. There were no common units purchased under the employee unit purchase plan during the nine months ended September 30, 2018. Distributions Crestwood Equity Limited Partners. A summary of CEQP’s limited partner quarterly cash distributions for the nine months ended September 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 August 7, 2018 August 14, 2018 0.60 42.7 $ 128.1 2017 February 7, 2017 February 14, 2017 $ 0.60 $ 41.8 May 8, 2017 May 15, 2017 0.60 41.8 August 7, 2017 August 14, 2017 0.60 41.8 $ 125.4 On October 18, 2018 , we declared a distribution of $0.60 per limited partner unit to be paid on November 14, 2018 to unitholders of record on November 7, 2018 with respect to the third 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 nine months ended September 30, 2018 , we made cash distributions to our preferred unitholders of approximately $45.0 million . During the nine months ended September 30, 2017 , we issued 4,724,030 Preferred Units to our preferred unitholders in lieu of paying cash distributions of $43.1 million . On October 18, 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 September 30, 2018 . In the second quarter of 2018, Crestwood Equity registered 71,257,445 preferred units under a shelf registration statement filed with the SEC under which holders of the Preferred Units may sell their preferred units. Crestwood Midstream During the nine months ended September 30, 2018 and 2017 , Crestwood Midstream paid cash distributions of $179.0 million and $119.5 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 achieve a certain rate of return. During the three and nine months ended September 30, 2018 , net income attributable to non-controlling partners was approximately $4.1 million and $12.1 million . During the three and nine months ended September 30, 2017 , net income attributable to non-controlling partners was approximately $6.4 million and $18.8 million . During the nine months ended September 30, 2018 and 2017 , Crestwood Niobrara paid cash distributions of $6.6 million and $11.4 million to its non-controlling partners, respectively. In October 2018, Crestwood Niobrara paid a cash distribution of $3.3 million to Jackalope Holdings for the quarter ended September 30, 2018 .

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 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 Court approved the final settlement on October 5, 2018. If no appeals are filed, 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 September 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 September 30, 2018 . At September 30, 2018 and December 31, 2017 , our accrual of approximately $2.0 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 $2.0 million to $3.9 million at September 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 September 30, 2018 and December 31, 2017 , CEQP’s self-insurance reserves were $12.8 million and $ 13.6 million . We estimate that $9.1 million of this balance will be paid subsequent to September 30, 2019 . As such, CEQP has classified $9.1 million in other long-term liabilities on its consolidated balance sheet at September 30, 2018 . At September 30, 2018 and December 31, 2017 , CMLP’s self insurance reserves were $11.2 million and $11.6 million . CMLP estimates that $7.6 million of this balance will be paid subsequent to September 30, 2019 . As such, CMLP has classified $7.6 million in other long-term liabilities on its consolidated balance sheet at September 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 September 30, 2018 and December 31, 2017 , we have no amounts accrued for these guarantees.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 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 Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Revenues at CEQP and CMLP $ 0.3 $ 0.5 $ 0.9 $ 1.4 Costs of product/services sold at CEQP and CMLP (1) $ 45.7 $ 3.7 $ 91.0 $ 11.8 Operations and maintenance expenses at CEQP and CMLP (2) $ 8.2 $ 6.6 $ 22.2 $ 16.4 General and administrative expenses charged by CEQP to CMLP, net (3) $ 4.8 $ 4.4 $ 15.3 $ 14.8 General and administrative expenses at CEQP charged from Crestwood Holdings, net (4) $ (4.0 ) $ (0.2 ) $ (8.8 ) $ (0.4 ) (1) Includes $16.8 million and $45.1 million during the three and nine months ended September 30, 2018 related to purchases of NGLs from a subsidiary of Crestwood Permian and $28.9 million and $45.9 million during the same periods related to an agency marketing agreement with Ascent Resources - Utica, LLC (Ascent). Includes $3.7 million and $11.8 million representing natural gas purchases from Sabine for the three and nine months ended September 30, 2017 . Ascent and Sabine are affiliates of Crestwood Holdings for the respective periods presented. (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 nine months ended September 30, 2018 , we charged $1.8 million and $6.0 million to Stagecoach Gas, $0.9 million and $2.9 million to Tres Palacios, $5.1 million and $12.6 million to Crestwood Permian and $0.4 million and $0.7 million to Jackalope. During the three and nine months ended September 30, 2017 , we charged $2.0 million and $6.5 million to Stagecoach Gas, $0.8 million and $2.6 million to Tres Palacios, $3.7 million and $7.0 million to Crestwood Permian, and $0.1 million and $0.3 million to Jackalope. (3) Includes $5.6 million and $17.7 million of net unit-based compensation charges allocated from CEQP to CMLP for the three and nine months ended September 30, 2018 and $5.2 million and $17.1 million for the three and nine months ended September 30, 2017. In addition, includes $0.8 million and $2.4 million of CMLP’s general and administrative costs allocated to CEQP during the three and nine months ended September 30, 2018 and $0.8 million and $2.3 million during the three and nine months ended September 30, 2017 . (4) Includes $4.8 million and $10.2 million unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three and nine months ended September 30, 2018 and $1.1 million and $1.9 million during the three and nine months ended September 30, 2017 . The following table shows accounts receivable and accounts payable from our affiliates ( in millions ): September 30, December 31, Accounts receivable at CEQP and CMLP $ 6.2 $ 7.1 Accounts payable at CEQP $ 27.8 $ 7.4 Accounts payable at CMLP $ 25.3 $ 5.0

Segments

Segments	9 Months Ended
	Sep. 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 Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Net income (loss) $ (5.2 ) $ (27.9 ) $ 7.4 $ (47.0 ) Add: Interest and debt expense, net 25.1 24.2 73.8 74.8 Loss on modification/extinguishment of debt — — — 37.7 Provision for income taxes — 0.1 0.2 — Depreciation, amortization and accretion 39.2 48.1 128.8 145.2 EBITDA $ 59.1 $ 44.5 $ 210.2 $ 210.7 Below is a reconciliation of CMLP’s net income (loss) to EBITDA ( in millions ): Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Net income (loss) $ (7.8 ) $ (29.8 ) $ 1.1 $ (53.1 ) Add: Interest and debt expense, net 25.1 24.2 73.8 74.8 Loss on modification/extinguishment of debt — — — 37.7 Provision for income taxes — 0.1 0.1 — Depreciation, amortization and accretion 42.7 50.9 137.9 153.5 EBITDA $ 60.0 $ 45.4 $ 212.9 $ 212.9 The following tables summarize CEQP’s and CMLP’s reportable segment data for the three and nine months ended September 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 $10.8 million and $10.0 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 September 30, 2018 and 2017 and $30.4 million and $25.7 million for the nine months ended September 30, 2018 and 2017 . Crestwood Equity Three Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 242.3 $ 3.5 $ 684.4 $ — $ 930.2 Intersegment revenues 54.8 2.6 (57.4 ) — — Costs of product/services sold 205.1 (0.1 ) 622.5 — 827.5 Operations and maintenance expense 17.2 0.7 11.7 — 29.6 General and administrative expense — — — 25.5 25.5 Gain (loss) on long-lived assets, net (2.2 ) — (2.5 ) 1.1 (3.6 ) Earnings from unconsolidated affiliates, net 5.6 9.5 — — 15.1 EBITDA $ 78.2 $ 15.0 $ (9.7 ) $ (24.4 ) $ 59.1 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,647.8 $ 1,015.3 $ 673.1 $ 30.2 $ 4,366.4 Three Months Ended September 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 434.4 $ 6.2 $ 515.0 $ — $ 955.6 Intersegment revenues 29.9 1.2 (31.1 ) — — Costs of product/services sold 378.6 0.2 479.7 — 858.5 Operations and maintenance expense 16.2 1.0 18.3 — 35.5 General and administrative expense — — — 22.5 22.5 Gain (loss) on long-lived assets (3.9 ) — 0.6 (3.0 ) (6.3 ) Earnings from unconsolidated affiliates, net 4.3 7.2 — — 11.5 Other income, net — — — 0.2 0.2 EBITDA $ 69.9 $ 13.4 $ (13.5 ) $ (25.3 ) $ 44.5 Nine Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 838.1 $ 12.8 $ 2,034.8 $ — $ 2,885.7 Intersegment revenues 141.5 7.1 (148.6 ) — — Costs of product/services sold 701.6 0.1 1,817.0 — 2,518.7 Operations and maintenance expense 52.7 2.3 41.0 — 96.0 General and administrative expense — — — 72.8 72.8 Gain (loss) on long-lived assets, net (2.1 ) — (26.7 ) 1.1 (27.7 ) Earnings from unconsolidated affiliates, net 15.8 23.7 — — 39.5 Other income, net — — — 0.2 0.2 EBITDA $ 239.0 $ 41.2 $ 1.5 $ (71.5 ) $ 210.2 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,647.8 $ 1,015.3 $ 673.1 $ 30.2 $ 4,366.4 Nine Months Ended September 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 1,208.1 $ 24.7 $ 1,401.2 $ — $ 2,634.0 Intersegment revenues 94.3 4.7 (99.0 ) — — Costs of product/services sold 1,049.9 0.3 1,221.4 — 2,271.6 Operations and maintenance expense 51.8 3.4 48.2 — 103.4 General and administrative expense — — — 71.6 71.6 Gain (loss) on long-lived assets (3.9 ) — 0.6 (3.0 ) (6.3 ) Earnings from unconsolidated affiliates, net 7.7 21.5 — — 29.2 Other income, net — — — 0.4 0.4 EBITDA $ 204.5 $ 47.2 $ 33.2 $ (74.2 ) $ 210.7 Crestwood Midstream Three Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 242.3 $ 3.5 $ 684.4 $ — $ 930.2 Intersegment revenues 54.8 2.6 (57.4 ) — — Costs of product/services sold 205.1 (0.1 ) 622.5 — 827.5 Operations and maintenance expense 17.2 0.7 11.7 — 29.6 General and administrative expense — — — 24.6 24.6 Gain (loss) on long-lived assets, net (2.2 ) — (2.5 ) 1.1 (3.6 ) Earnings from unconsolidated affiliates, net 5.6 9.5 — — 15.1 EBITDA $ 78.2 $ 15.0 $ (9.7 ) $ (23.5 ) $ 60.0 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,825.0 $ 1,015.3 $ 673.1 $ 23.0 $ 4,536.4 Three Months Ended September 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 434.4 $ 6.2 $ 515.0 $ — $ 955.6 Intersegment revenues 29.9 1.2 (31.1 ) — — Costs of product/services sold 378.6 0.2 479.7 — 858.5 Operations and maintenance expense 16.2 1.0 18.3 — 35.5 General and administrative expense — — — 21.4 21.4 Gain (loss) on long-lived assets, net (3.9 ) — 0.6 (3.0 ) (6.3 ) Earnings from unconsolidated affiliates, net 4.3 7.2 — — 11.5 EBITDA $ 69.9 $ 13.4 $ (13.5 ) $ (24.4 ) $ 45.4 Nine Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 838.1 $ 12.8 $ 2,034.8 $ — $ 2,885.7 Intersegment revenues 141.5 7.1 (148.6 ) — — Costs of product/services sold 701.6 0.1 1,817.0 — 2,518.7 Operations and maintenance expense 52.7 2.3 41.0 — 96.0 General and administrative expense — — — 69.9 69.9 Gain (loss) on long-lived assets, net (2.1 ) — (26.7 ) 1.1 (27.7 ) Earnings from unconsolidated affiliates, net 15.8 23.7 — — 39.5 EBITDA $ 239.0 $ 41.2 $ 1.5 $ (68.8 ) $ 212.9 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,825.0 $ 1,015.3 $ 673.1 $ 23.0 $ 4,536.4 Nine Months Ended September 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 1,208.1 $ 24.7 $ 1,401.2 $ — $ 2,634.0 Intersegment revenues 94.3 4.7 (99.0 ) — — Costs of product/services sold 1,049.9 0.3 1,221.4 — 2,271.6 Operations and maintenance expense 51.8 3.4 48.2 — 103.4 General and administrative expense — — — 69.0 69.0 Gain (loss) on long-lived assets (3.9 ) — 0.6 (3.0 ) (6.3 ) Earnings from unconsolidated affiliates, net 7.7 21.5 — — 29.2 EBITDA $ 204.5 $ 47.2 $ 33.2 $ (72.0 ) $ 212.9 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 nine months ended September 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 September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Revenues: Topic 606 revenues Gathering Natural gas $ 32.9 $ — $ — $ — $ 32.9 Crude oil 9.4 — — — 9.4 Water 15.5 — — — 15.5 Processing Natural gas 2.7 — — — 2.7 NGLs — — 2.0 — 2.0 Compression Natural gas 7.0 — — — 7.0 Storage Crude oil 0.4 0.8 — (0.4 ) 0.8 NGLs — — 1.9 — 1.9 Pipeline Crude oil — 2.1 — (0.6 ) 1.5 Transportation Crude oil 0.9 — 1.5 — 2.4 NGLs — — 6.6 — 6.6 Water — — — — — Rail Loading — Crude oil — 2.8 — (1.3 ) 1.5 NGLs — — 0.9 — 0.9 Product Sales Natural gas 13.4 — 31.7 (3.9 ) 41.2 Crude oil 190.3 — 268.8 (43.1 ) 416.0 NGLs 24.6 — 291.1 (7.8 ) 307.9 Other — 0.4 — (0.3 ) 0.1 Total Topic 606 revenues 297.1 6.1 604.5 (57.4 ) 850.3 Non-Topic 606 revenues (1) — — 79.9 — 79.9 Total revenues $ 297.1 $ 6.1 $ 684.4 $ (57.4 ) $ 930.2 (1) Represents revenues related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Nine Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Revenues: Topic 606 revenues Gathering Natural gas $ 102.2 $ — $ — $ — $ 102.2 Crude oil 28.0 — — — 28.0 Water 41.3 — — — 41.3 Processing Natural gas 8.1 — — — 8.1 NGLs — — 6.1 — 6.1 Compression Natural gas 22.5 — — — 22.5 Storage Crude oil 1.3 2.6 — (0.9 ) 3.0 NGLs — — 7.4 — 7.4 Pipeline Crude oil — 4.7 — (1.6 ) 3.1 Transportation Crude oil 2.1 — 4.4 — 6.5 NGLs — — 26.0 — 26.0 Water — — 0.2 — 0.2 Rail Loading Crude oil — 11.5 — (3.8 ) 7.7 NGLs — — 3.1 — 3.1 Product Sales Natural gas 38.7 — 48.4 (10.6 ) 76.5 Crude oil 667.9 — 725.4 (112.4 ) 1,280.9 NGLs 67.5 — 1,003.1 (18.5 ) 1,052.1 Other — 1.1 — (0.8 ) 0.3 Total Topic 606 revenues 979.6 19.9 1,824.1 (148.6 ) 2,675.0 Non-Topic 606 revenues (1) — — 210.7 — 210.7 Total revenues $ 979.6 $ 19.9 $ 2,034.8 $ (148.6 ) $ 2,885.7 (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	9 Months Ended
	Sep. 30, 2018
Condensed Financial Information 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 September 30, 2018 and December 31, 2017 , and for the three and nine months ended September 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 September 30, 2018 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash $ 2.0 $ — $ — $ — $ 2.0 Accounts receivable — 344.3 5.7 — 350.0 Inventory — 91.8 — — 91.8 Other current assets — 83.1 — — 83.1 Total current assets 2.0 519.2 5.7 — 526.9 Property, plant and equipment, net — 2,137.5 — — 2,137.5 Goodwill and intangible assets, net — 702.8 — — 702.8 Investment in consolidated affiliates 3,745.9 — — (3,745.9 ) — Investment in unconsolidated affiliates — — 1,166.9 — 1,166.9 Other non-current assets — 2.3 — — 2.3 Total assets $ 3,747.9 $ 3,361.8 $ 1,172.6 $ (3,745.9 ) $ 4,536.4 Liabilities and partners’ capital Current liabilities: Accounts payable $ — $ 319.2 $ — $ — $ 319.2 Other current liabilities 38.8 118.8 — — 157.6 Total current liabilities 38.8 438.0 — — 476.8 Long-term liabilities: Long-term debt, less current portion 1,675.1 — — — 1,675.1 Other long-term liabilities — 112.4 57.0 — 169.4 Deferred income taxes — 0.6 — — 0.6 Partners’ capital 2,034.0 2,810.8 935.1 (3,745.9 ) 2,034.0 Interest of non-controlling partners in subsidiary — — 180.5 — 180.5 Total partners’ capital 2,034.0 2,810.8 1,115.6 (3,745.9 ) 2,214.5 Total liabilities and partners’ capital $ 3,747.9 $ 3,361.8 $ 1,172.6 $ (3,745.9 ) $ 4,536.4 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 non-current 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 September 30, 2018 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 930.2 $ — $ — $ 930.2 Costs of product/services sold — 827.5 — — 827.5 Operating expenses and other: Operations and maintenance — 29.6 — — 29.6 General and administrative 14.3 10.3 — — 24.6 Depreciation, amortization and accretion — 42.7 — — 42.7 Loss on long-lived assets, net — 3.6 — — 3.6 14.3 86.2 — — 100.5 Operating income (loss) (14.3 ) 16.5 — — 2.2 Earnings from unconsolidated affiliates, net — — 15.1 — 15.1 Interest and debt expense, net (25.1 ) — — — (25.1 ) Equity in net income (loss) of subsidiaries 27.5 — — (27.5 ) — Net income (loss) (11.9 ) 16.5 15.1 (27.5 ) (7.8 ) Net income attributable to non-controlling partners in subsidiaries — — 4.1 — 4.1 Net income (loss) attributable to Crestwood Midstream Partners LP $ (11.9 ) $ 16.5 $ 11.0 $ (27.5 ) $ (11.9 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended September 30, 2017 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 955.6 $ — $ — $ 955.6 Costs of product/services sold — 858.5 — — 858.5 Operating expenses: Operations and maintenance — 35.5 — — 35.5 General and administrative 15.2 6.2 — — 21.4 Depreciation, amortization and accretion — 50.9 — — 50.9 Loss on long-lived assets, net — 6.3 — — 6.3 15.2 98.9 — — 114.1 Operating loss (15.2 ) (1.8 ) — — (17.0 ) Earnings from unconsolidated affiliates, net — — 11.5 — 11.5 Interest and debt expense, net (24.2 ) — — — (24.2 ) Equity in net income (loss) of subsidiaries 3.2 — — (3.2 ) — Income (loss) before income taxes (36.2 ) (1.8 ) 11.5 (3.2 ) (29.7 ) Provision for income taxes — (0.1 ) — — (0.1 ) Net income (loss) (36.2 ) (1.9 ) 11.5 (3.2 ) (29.8 ) Net income attributable to non-controlling partners in subsidiaries — — 6.4 — 6.4 Net income (loss) attributable to Crestwood Midstream Partners LP $ (36.2 ) $ (1.9 ) $ 5.1 $ (3.2 ) $ (36.2 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Nine Months Ended September 30, 2018 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 2,885.7 $ — $ — $ 2,885.7 Costs of product/services sold — 2,518.7 — — 2,518.7 Operating expenses and other: Operations and maintenance — 96.0 — — 96.0 General and administrative 42.0 27.9 — — 69.9 Depreciation, amortization and accretion — 137.9 — — 137.9 Loss on long-lived assets, net — 27.7 — — 27.7 42.0 289.5 — — 331.5 Operating income (loss) (42.0 ) 77.5 — — 35.5 Earnings from unconsolidated affiliates, net — — 39.5 — 39.5 Interest and debt expense, net (73.8 ) — — — (73.8 ) Equity in net income (loss) of subsidiaries 104.8 — — (104.8 ) — Income (loss) before income taxes (11.0 ) 77.5 39.5 (104.8 ) 1.2 Provision for income taxes — (0.1 ) — — (0.1 ) Net income (loss) (11.0 ) 77.4 39.5 (104.8 ) 1.1 Net income attributable to non-controlling partners in subsidiaries — — 12.1 — 12.1 Net income (loss) attributable to Crestwood Midstream Partners LP $ (11.0 ) $ 77.4 $ 27.4 $ (104.8 ) $ (11.0 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Nine Months Ended September 30, 2017 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 2,634.0 $ — $ — $ 2,634.0 Costs of product/services sold — 2,271.6 — — 2,271.6 Operating expenses: Operations and maintenance — 103.4 — — 103.4 General and administrative 50.1 18.9 — — 69.0 Depreciation, amortization and accretion — 153.5 — — 153.5 Loss on long-lived assets, net — 6.3 — — 6.3 50.1 282.1 — — 332.2 Operating income (loss) (50.1 ) 80.3 — — 30.2 Earnings from unconsolidated affiliates, net — — 29.2 — 29.2 Interest and debt expense, net (74.8 ) — — — (74.8 ) Loss on modification/extinguishment of debt (37.7 ) — — — (37.7 ) Equity in net income (loss) of subsidiaries 90.7 — — (90.7 ) — Net income (loss) (71.9 ) 80.3 29.2 (90.7 ) (53.1 ) Net income attributable to non-controlling partners in subsidiaries — — 18.8 — 18.8 Net income (loss) attributable to Crestwood Midstream Partners LP $ (71.9 ) $ 80.3 $ 10.4 $ (90.7 ) $ (71.9 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Nine Months Ended September 30, 2018 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Cash flows from operating activities $ (92.1 ) $ 262.1 $ 36.4 $ — $ 206.4 Cash flows from investing activities: Purchases of property, plant and equipment (3.7 ) (202.0 ) — — (205.7 ) Investment in unconsolidated affiliates — — (27.7 ) — (27.7 ) Capital distributions from unconsolidated affiliates — — 34.6 — 34.6 Net proceeds from sale of assets — 8.6 — — 8.6 Capital distributions from consolidated affiliates 36.7 — — (36.7 ) — Net cash provided by (used in) investing activities 33.0 (193.4 ) 6.9 (36.7 ) (190.2 ) Cash flows from financing activities: Proceeds from the issuance of long-term debt 1,152.1 — — — 1,152.1 Payments on long-term debt (972.8 ) (0.9 ) — — (973.7 ) Payments on capital leases — (1.1 ) — — (1.1 ) Distributions to partners (179.0 ) — (6.6 ) — (185.6 ) Distributions to parent — — (36.7 ) 36.7 — Taxes paid for unit-based compensation vesting — (6.9 ) — — (6.9 ) Change in intercompany balances 59.8 (59.8 ) — — — Net cash provided by (used in) financing activities 60.1 (68.7 ) (43.3 ) 36.7 (15.2 ) Net change in cash 1.0 — — — 1.0 Cash at beginning of period 1.0 — — — 1.0 Cash at end of period $ 2.0 $ — $ — $ — $ 2.0 Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Nine Months Ended September 30, 2017 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Cash flows from operating activities $ (102.6 ) $ 312.0 $ 23.5 $ — $ 232.9 Cash flows from investing activities: Purchases of property, plant and equipment (5.8 ) (128.6 ) — — (134.4 ) Investment in unconsolidated affiliates — — (46.5 ) — (46.5 ) Capital distributions from unconsolidated affiliates — — 35.3 — 35.3 Net proceeds from sale of assets — 1.3 — — 1.3 Capital distributions from consolidated affiliates 0.9 — — (0.9 ) — Net cash used in investing activities (4.9 ) (127.3 ) (11.2 ) (0.9 ) (144.3 ) Cash flows from financing activities: Proceeds from the issuance of long-term debt 2,209.8 — — — 2,209.8 Payments on long-term debt (2,157.9 ) (1.3 ) — — (2,159.2 ) Payments on capital leases — (2.2 ) — — (2.2 ) Payments for debt-related deferred costs (1.0 ) — — — (1.0 ) Distributions to partners (119.5 ) — (11.4 ) — (130.9 ) Distributions to parent — — (0.9 ) 0.9 — Taxes paid for unit-based compensation vesting — (5.3 ) — — (5.3 ) Change in intercompany balances 175.9 (175.9 ) — — — Net cash provided by (used in) financing activities 107.3 (184.7 ) (12.3 ) 0.9 (88.8 ) Net change in cash (0.2 ) — — — (0.2 ) Cash at beginning of period 1.3 — — — 1.3 Cash at end of period $ 1.1 $ — $ — $ — $ 1.1

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 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 nine months ended September 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 September 30, 2018 (in millions) : Remainder of 2018 $ 12.2 2019 27.7 2020 23.5 2021 9.4 2022 7.3 Thereafter 10.6 Total $ 90.7 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 $323.8 million for both CEQP and CMLP at September 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 13 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 September 30, 2018 Contract Assets (Non-current) $ 1.1 $ 1.0 Contract Liabilities (Current) (1) 12.2 12.7 Contract Liabilities (Non-current) (2) 60.6 64.2 (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 nine months ended September 30, 2018 , we recognized revenues of approximately $3.1 million and $9.3 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 September 30, 2018 Nine Months Ended September 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) $ 173.5 $ 442.7 $ (269.2 ) $ 632.6 $ 1,309.6 $ (677.0 ) Service revenues: Gathering and processing (1)(2) 68.8 78.8 (10.0 ) 205.4 236.7 (31.3 ) Marketing, supply and logistics (3) 12.6 12.3 0.3 46.4 45.6 0.8 Costs of product/services sold: Product costs (1) 770.8 1,052.9 (282.1 ) 2,391.5 3,108.4 (716.9 ) Depreciation, amortization and accretion (2) 39.2 38.0 1.2 128.8 125.1 3.7 Earnings from unconsolidated affiliates, net (4) 15.1 17.4 (2.3 ) 39.5 46.8 (7.3 ) Net income (loss) (5.2 ) (4.9 ) (0.3 ) 7.4 9.0 (1.6 ) September 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,505.2 $ 2,391.7 $ 113.5 Accumulated depreciation and depletion (2) 543.7 527.8 15.9 Investments in unconsolidated affiliates (4) 1,166.9 1,183.7 (16.8 ) Liabilities: Accrued expenses and other liabilities (2)(3) 114.1 102.5 11.6 Other long-term liabilities (2)(3) 172.0 108.6 63.4 Partners’ capital: Crestwood Equity Partners LP partners’ capital (2)(3)(4) 1,243.4 1,237.5 5.9 Crestwood Midstream Three Months Ended September 30, 2018 Nine Months Ended September 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) $ 173.5 $ 442.7 $ (269.2 ) $ 632.6 $ 1,309.6 $ (677.0 ) Service revenues: Gathering and processing (1)(2) 68.8 78.8 (10.0 ) 205.4 236.7 (31.3 ) Marketing, supply and logistics (3) 12.6 12.3 0.3 46.4 45.6 0.8 Costs of product/services sold: Product costs (1) 770.8 1,052.9 (282.1 ) 2,391.5 3,108.4 (716.9 ) Depreciation, amortization and accretion (2) 42.7 41.5 1.2 137.9 134.2 3.7 Earnings from unconsolidated affiliates, net (4) 15.1 17.4 (2.3 ) 39.5 46.8 (7.3 ) Net income (loss) (7.8 ) (7.5 ) (0.3 ) 1.1 2.7 (1.6 ) September 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,835.2 $ 2,721.7 $ 113.5 Accumulated depreciation and depletion (2) 697.7 681.8 15.9 Investments in unconsolidated affiliates (4) 1,166.9 1,183.7 (16.8 ) Liabilities: Accrued expenses and other liabilities (2)(3) 113.2 101.6 11.6 Other long-term liabilities (2)(3) 169.4 106.0 63.4 Partners’ capital (2)(3)(4) 2,034.0 2,028.1 5.9 (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 $2.3 million and $7.3 million during the three and nine months ended September 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 September 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. We will adopt the provisions of the standard effective January 1, 2019 using the modified retrospective method. As allowed for in the standard, upon adoption we currently anticipate that we will not reassess the current GAAP classification of leases, easements and rights of way that exist as of December 31, 2018, and will not utilize the hindsight method in determining the assets and liabilities to be recorded for our existing leases on 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 Sum_2

Basis of Presentation and Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The following table summarizes the transaction price allocated to our remaining performance obligations under certain contracts that have not been recognized as of September 30, 2018 (in millions) : Remainder of 2018 $ 12.2 2019 27.7 2020 23.5 2021 9.4 2022 7.3 Thereafter 10.6 Total $ 90.7 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 September 30, 2018 Nine Months Ended September 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) $ 173.5 $ 442.7 $ (269.2 ) $ 632.6 $ 1,309.6 $ (677.0 ) Service revenues: Gathering and processing (1)(2) 68.8 78.8 (10.0 ) 205.4 236.7 (31.3 ) Marketing, supply and logistics (3) 12.6 12.3 0.3 46.4 45.6 0.8 Costs of product/services sold: Product costs (1) 770.8 1,052.9 (282.1 ) 2,391.5 3,108.4 (716.9 ) Depreciation, amortization and accretion (2) 39.2 38.0 1.2 128.8 125.1 3.7 Earnings from unconsolidated affiliates, net (4) 15.1 17.4 (2.3 ) 39.5 46.8 (7.3 ) Net income (loss) (5.2 ) (4.9 ) (0.3 ) 7.4 9.0 (1.6 ) September 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,505.2 $ 2,391.7 $ 113.5 Accumulated depreciation and depletion (2) 543.7 527.8 15.9 Investments in unconsolidated affiliates (4) 1,166.9 1,183.7 (16.8 ) Liabilities: Accrued expenses and other liabilities (2)(3) 114.1 102.5 11.6 Other long-term liabilities (2)(3) 172.0 108.6 63.4 Partners’ capital: Crestwood Equity Partners LP partners’ capital (2)(3)(4) 1,243.4 1,237.5 5.9 Crestwood Midstream Three Months Ended September 30, 2018 Nine Months Ended September 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) $ 173.5 $ 442.7 $ (269.2 ) $ 632.6 $ 1,309.6 $ (677.0 ) Service revenues: Gathering and processing (1)(2) 68.8 78.8 (10.0 ) 205.4 236.7 (31.3 ) Marketing, supply and logistics (3) 12.6 12.3 0.3 46.4 45.6 0.8 Costs of product/services sold: Product costs (1) 770.8 1,052.9 (282.1 ) 2,391.5 3,108.4 (716.9 ) Depreciation, amortization and accretion (2) 42.7 41.5 1.2 137.9 134.2 3.7 Earnings from unconsolidated affiliates, net (4) 15.1 17.4 (2.3 ) 39.5 46.8 (7.3 ) Net income (loss) (7.8 ) (7.5 ) (0.3 ) 1.1 2.7 (1.6 ) September 30, 2018 As Reported under Topic 606 Prior to Adoption of Topic 606 Increase (Decrease) Balance Sheet Assets: Property, plant and equipment (2) $ 2,835.2 $ 2,721.7 $ 113.5 Accumulated depreciation and depletion (2) 697.7 681.8 15.9 Investments in unconsolidated affiliates (4) 1,166.9 1,183.7 (16.8 ) Liabilities: Accrued expenses and other liabilities (2)(3) 113.2 101.6 11.6 Other long-term liabilities (2)(3) 169.4 106.0 63.4 Partners’ capital (2)(3)(4) 2,034.0 2,028.1 5.9 (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 $2.3 million and $7.3 million during the three and nine months ended September 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 opening and closing balances of our contract assets and contract liabilities (in millions) : Balance at January 1, 2018 Balance at September 30, 2018 Contract Assets (Non-current) $ 1.1 $ 1.0 Contract Liabilities (Current) (1) 12.2 12.7 Contract Liabilities (Non-current) (2) 60.6 64.2 (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 nine months ended September 30, 2018 , we recognized revenues of approximately $3.1 million and $9.3 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.

Certain Balance Sheet Informa_2

Certain Balance Sheet Information (Tables)	9 Months Ended
	Sep. 30, 2018
Balance Sheet Related Disclosures [Abstract]
Schedule of Accrued Liabilities	Accrued expenses and other liabilities consisted of the following ( in millions ): CEQP CMLP September 30, December 31, September 30, December 31, 2018 2017 2018 2017 Accrued expenses $ 38.8 $ 56.6 $ 37.9 $ 55.5 Accrued property taxes 4.8 4.8 4.8 4.8 Income tax payable 0.2 0.3 0.2 0.3 Interest payable 38.6 20.3 38.6 20.3 Accrued additions to property, plant and equipment 16.6 22.3 16.6 22.2 Capital leases 2.4 1.0 2.4 1.0 Deferred revenue 12.7 0.6 12.7 0.6 Total accrued expenses and other liabilities $ 114.1 $ 105.9 $ 113.2 $ 104.7

Investments in Unconsolidated_2

Investments in Unconsolidated Affiliates (Tables)	9 Months Ended
	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	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 September 30, December 31, Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 2018 2017 Stagecoach Gas Services LLC (1) $ 836.6 $ 849.8 $ 8.8 $ 6.4 $ 21.5 $ 19.0 Jackalope Gas Gathering Services, L.L.C. (2)(6) 181.1 184.9 4.5 1.5 11.3 5.5 Crestwood Permian Basin Holdings LLC (3) 103.5 102.0 1.1 2.8 4.5 2.2 Tres Palacios Holdings LLC (4) 36.9 37.8 0.1 0.3 0.5 1.5 Powder River Basin Industrial Complex, LLC (5) 8.8 8.5 0.6 0.5 1.7 1.0 Total $ 1,166.9 $ 1,183.0 $ 15.1 $ 11.5 $ 39.5 $ 29.2 (1) As of September 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. Pursuant to the Stagecoach limited liability company agreement, our share of Stagecoach’s equity earnings increased from 35% to 40% effective July 1, 2018, Our Stagecoach Gas investment is included in our storage and transportation segment. (2) As of September 30, 2018 , our equity in the underlying net assets of Jackalope exceeded our investment balance by approximately $0.4 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. Pursuant to the Crestwood Permian limited liability company agreement, we were allocated 100% of Crestwood New Mexico’s earnings through June 30, 2018. Effective July 1, 2018, our equity earnings from Crestwood New Mexico is based on our ownership percentage of Crestwood Permian, which is currently 50% . Our Crestwood Permian investment is included in our gathering and processing segment. (4) As of September 30, 2018 , our equity in the underlying net assets of Tres Palacios Holdings LLC (Tres Holdings) exceeded our investment balance by approximately $25.6 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 September 30, 2018 , our equity in the underlying net assets of Powder River Basin Industrial Complex, LLC (PRBIC) exceeded our investment balance by approximately $6.0 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 $2.3 million and $7.3 million during the three and nine months ended September 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 ): Nine Months Ended September 30, 2018 2017 Operating Revenues Operating Expenses Net Income Operating Revenues Operating Expenses Net Income Stagecoach Gas $ 129.3 $ 59.1 $ 70.2 $ 127.1 $ 58.4 $ 68.8 Other (1) 114.0 101.4 16.4 124.6 103.7 20.8 Total $ 243.3 $ 160.5 $ 86.6 $ 251.7 $ 162.1 $ 89.6 (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 nine months ended September 30, 2018 and 2017 . We recorded amortization of the excess basis in our Tres Holdings equity investment of approximately $0.9 million for both the nine months ended September 30, 2018 and 2017 . We recorded amortization of the excess basis in our PRBIC equity investment of approximately $0.4 million and $0.5 million for the nine months ended September 30, 2018 and 2017 . Distributions and Contributions The following table summarizes our distributions and contributions from our unconsolidated affiliates (in millions) : Distributions (1) Contributions Nine Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Stagecoach Gas $ 34.7 $ 35.7 $ — $ — Jackalope 23.2 19.4 17.6 2.9 Crestwood Permian (2) 10.6 — 7.6 113.0 Tres Holdings 3.9 5.8 2.5 — PRBIC 1.4 1.1 — — Total $ 73.8 $ 62.0 $ 27.7 $ 115.9 (1) In October 2018, we received cash distributions from Stagecoach Gas, Crestwood Permian and Tres Holdings of approximately $13.9 million , $4.1 million and $1.4 million , respectively. (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.

Risk Management (Tables)

Risk Management (Tables)	9 Months Ended
	Sep. 30, 2018
Risk Management - Notional Amounts and Terms of Companys Derivative Financial Instruments [Abstract]
Derivatives Not Designated as Hedging Instruments [Table Text Block]	The following table summarizes the impact to our consolidated statements of operations related to our commodity-based derivatives reflected in costs of product/services sold and operating revenues during the three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Loss reflected in costs of product/services sold $ (16.7 ) $ (24.1 ) $ (15.3 ) $ (22.6 ) Product revenues 79.9 36.4 210.7 109.5
Notional Amounts And Terms Of Company's Derivative Financial Instruments	The notional amounts and terms of our derivative financial instruments include the following: September 30, 2018 December 31, 2017 Fixed Price Payor Fixed Price Receiver Fixed Price Payor Fixed Price Receiver Propane, crude and heating oil (MMBbls) 17.6 20.7 15.3 17.5 Natural gas (MMcf) 1,760 1,730 780 660

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [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 ): September 30, 2018 December 31, 2017 Carrying Amount Fair Value Carrying Amount Fair Value 2023 Senior Notes $ 693.2 $ 725.0 $ 692.1 $ 728.8 2025 Senior Notes $ 493.1 $ 511.8 $ 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 September 30, 2018 and December 31, 2017 ( in millions ): September 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 $ 5.2 $ 107.2 $ — $ 112.4 $ (86.7 ) $ (18.1 ) $ 7.6 Suburban Propane Partners, L.P. units (2) 3.4 — — 3.4 — — 3.4 Total assets at fair value $ 8.6 $ 107.2 $ — $ 115.8 $ (86.7 ) $ (18.1 ) $ 11.0 Liabilities Liabilities from price risk management $ 5.4 $ 119.3 $ — $ 124.7 $ (86.7 ) $ 5.5 $ 43.5 Total liabilities at fair value $ 5.4 $ 119.3 $ — $ 124.7 $ (86.7 ) $ 5.5 $ 43.5 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)	9 Months Ended
	Sep. 30, 2018
Text Block [Abstract]
Components Of Long-Term Debt	Long-term debt consisted of the following at September 30, 2018 and December 31, 2017 ( in millions ): September 30, December 31, Credit Facility $ 497.5 $ 318.2 2023 Senior Notes 700.0 700.0 2025 Senior Notes 500.0 500.0 Other 1.5 2.4 Less: deferred financing costs, net 23.0 28.4 Total debt 1,676.0 1,492.2 Less: current portion 0.9 0.9 Total long-term debt, less current portion $ 1,675.1 $ 1,491.3

Earnings Per Limited Partner _2

Earnings Per Limited Partner Unit (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	The following table summarizes information regarding the weighted-average of common units excluded during the three and nine months ended September 30, 2018 and 2017 : Three Months Ended Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Preferred units (1) 7,125,744 7,125,744 7,125,744 6,968,210 Crestwood Niobrara’s preferred units (1) 5,112,277 7,277,340 5,080,952 7,277,340 Performance units (2) 335,856 355,934 341,012 305,934 Subordinated units (2) 438,789 438,789 438,789 438,789 (1) See Note 10 for additional information regarding the potential conversion of our preferred units and Crestwood Niobrara’s preferred units to common units. (2) For a description of our subordinated and performance units, see our 2017 Annual Report on Form 10-K.

Partners' Capital (Tables)

Partners' Capital (Tables)	9 Months Ended
	Sep. 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 nine months ended September 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 August 7, 2018 August 14, 2018 0.60 42.7 $ 128.1 2017 February 7, 2017 February 14, 2017 $ 0.60 $ 41.8 May 8, 2017 May 15, 2017 0.60 41.8 August 7, 2017 August 14, 2017 0.60 41.8 $ 125.4

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 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 Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Revenues at CEQP and CMLP $ 0.3 $ 0.5 $ 0.9 $ 1.4 Costs of product/services sold at CEQP and CMLP (1) $ 45.7 $ 3.7 $ 91.0 $ 11.8 Operations and maintenance expenses at CEQP and CMLP (2) $ 8.2 $ 6.6 $ 22.2 $ 16.4 General and administrative expenses charged by CEQP to CMLP, net (3) $ 4.8 $ 4.4 $ 15.3 $ 14.8 General and administrative expenses at CEQP charged from Crestwood Holdings, net (4) $ (4.0 ) $ (0.2 ) $ (8.8 ) $ (0.4 ) (1) Includes $16.8 million and $45.1 million during the three and nine months ended September 30, 2018 related to purchases of NGLs from a subsidiary of Crestwood Permian and $28.9 million and $45.9 million during the same periods related to an agency marketing agreement with Ascent Resources - Utica, LLC (Ascent). Includes $3.7 million and $11.8 million representing natural gas purchases from Sabine for the three and nine months ended September 30, 2017 . Ascent and Sabine are affiliates of Crestwood Holdings for the respective periods presented. (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 nine months ended September 30, 2018 , we charged $1.8 million and $6.0 million to Stagecoach Gas, $0.9 million and $2.9 million to Tres Palacios, $5.1 million and $12.6 million to Crestwood Permian and $0.4 million and $0.7 million to Jackalope. During the three and nine months ended September 30, 2017 , we charged $2.0 million and $6.5 million to Stagecoach Gas, $0.8 million and $2.6 million to Tres Palacios, $3.7 million and $7.0 million to Crestwood Permian, and $0.1 million and $0.3 million to Jackalope. (3) Includes $5.6 million and $17.7 million of net unit-based compensation charges allocated from CEQP to CMLP for the three and nine months ended September 30, 2018 and $5.2 million and $17.1 million for the three and nine months ended September 30, 2017. In addition, includes $0.8 million and $2.4 million of CMLP’s general and administrative costs allocated to CEQP during the three and nine months ended September 30, 2018 and $0.8 million and $2.3 million during the three and nine months ended September 30, 2017 . (4) Includes $4.8 million and $10.2 million unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three and nine months ended September 30, 2018 and $1.1 million and $1.9 million during the three and nine months ended September 30, 2017 .
Schedule of Related Party Receivables and Payables	The following table shows accounts receivable and accounts payable from our affiliates ( in millions ): September 30, December 31, Accounts receivable at CEQP and CMLP $ 6.2 $ 7.1 Accounts payable at CEQP $ 27.8 $ 7.4 Accounts payable at CMLP $ 25.3 $ 5.0

Segments (Tables)

Segments (Tables)	9 Months Ended
	Sep. 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 Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Net income (loss) $ (5.2 ) $ (27.9 ) $ 7.4 $ (47.0 ) Add: Interest and debt expense, net 25.1 24.2 73.8 74.8 Loss on modification/extinguishment of debt — — — 37.7 Provision for income taxes — 0.1 0.2 — Depreciation, amortization and accretion 39.2 48.1 128.8 145.2 EBITDA $ 59.1 $ 44.5 $ 210.2 $ 210.7
Summary Of Segment Information	The following tables summarize CEQP’s and CMLP’s reportable segment data for the three and nine months ended September 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 $10.8 million and $10.0 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 September 30, 2018 and 2017 and $30.4 million and $25.7 million for the nine months ended September 30, 2018 and 2017 . Crestwood Equity Three Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 242.3 $ 3.5 $ 684.4 $ — $ 930.2 Intersegment revenues 54.8 2.6 (57.4 ) — — Costs of product/services sold 205.1 (0.1 ) 622.5 — 827.5 Operations and maintenance expense 17.2 0.7 11.7 — 29.6 General and administrative expense — — — 25.5 25.5 Gain (loss) on long-lived assets, net (2.2 ) — (2.5 ) 1.1 (3.6 ) Earnings from unconsolidated affiliates, net 5.6 9.5 — — 15.1 EBITDA $ 78.2 $ 15.0 $ (9.7 ) $ (24.4 ) $ 59.1 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,647.8 $ 1,015.3 $ 673.1 $ 30.2 $ 4,366.4 Three Months Ended September 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 434.4 $ 6.2 $ 515.0 $ — $ 955.6 Intersegment revenues 29.9 1.2 (31.1 ) — — Costs of product/services sold 378.6 0.2 479.7 — 858.5 Operations and maintenance expense 16.2 1.0 18.3 — 35.5 General and administrative expense — — — 22.5 22.5 Gain (loss) on long-lived assets (3.9 ) — 0.6 (3.0 ) (6.3 ) Earnings from unconsolidated affiliates, net 4.3 7.2 — — 11.5 Other income, net — — — 0.2 0.2 EBITDA $ 69.9 $ 13.4 $ (13.5 ) $ (25.3 ) $ 44.5 Nine Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 838.1 $ 12.8 $ 2,034.8 $ — $ 2,885.7 Intersegment revenues 141.5 7.1 (148.6 ) — — Costs of product/services sold 701.6 0.1 1,817.0 — 2,518.7 Operations and maintenance expense 52.7 2.3 41.0 — 96.0 General and administrative expense — — — 72.8 72.8 Gain (loss) on long-lived assets, net (2.1 ) — (26.7 ) 1.1 (27.7 ) Earnings from unconsolidated affiliates, net 15.8 23.7 — — 39.5 Other income, net — — — 0.2 0.2 EBITDA $ 239.0 $ 41.2 $ 1.5 $ (71.5 ) $ 210.2 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,647.8 $ 1,015.3 $ 673.1 $ 30.2 $ 4,366.4 Nine Months Ended September 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 1,208.1 $ 24.7 $ 1,401.2 $ — $ 2,634.0 Intersegment revenues 94.3 4.7 (99.0 ) — — Costs of product/services sold 1,049.9 0.3 1,221.4 — 2,271.6 Operations and maintenance expense 51.8 3.4 48.2 — 103.4 General and administrative expense — — — 71.6 71.6 Gain (loss) on long-lived assets (3.9 ) — 0.6 (3.0 ) (6.3 ) Earnings from unconsolidated affiliates, net 7.7 21.5 — — 29.2 Other income, net — — — 0.4 0.4 EBITDA $ 204.5 $ 47.2 $ 33.2 $ (74.2 ) $ 210.7
Disaggregation of Revenue	See details in the table below for disaggregation of our revenues (in millions) . Three Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Revenues: Topic 606 revenues Gathering Natural gas $ 32.9 $ — $ — $ — $ 32.9 Crude oil 9.4 — — — 9.4 Water 15.5 — — — 15.5 Processing Natural gas 2.7 — — — 2.7 NGLs — — 2.0 — 2.0 Compression Natural gas 7.0 — — — 7.0 Storage Crude oil 0.4 0.8 — (0.4 ) 0.8 NGLs — — 1.9 — 1.9 Pipeline Crude oil — 2.1 — (0.6 ) 1.5 Transportation Crude oil 0.9 — 1.5 — 2.4 NGLs — — 6.6 — 6.6 Water — — — — — Rail Loading — Crude oil — 2.8 — (1.3 ) 1.5 NGLs — — 0.9 — 0.9 Product Sales Natural gas 13.4 — 31.7 (3.9 ) 41.2 Crude oil 190.3 — 268.8 (43.1 ) 416.0 NGLs 24.6 — 291.1 (7.8 ) 307.9 Other — 0.4 — (0.3 ) 0.1 Total Topic 606 revenues 297.1 6.1 604.5 (57.4 ) 850.3 Non-Topic 606 revenues (1) — — 79.9 — 79.9 Total revenues $ 297.1 $ 6.1 $ 684.4 $ (57.4 ) $ 930.2 (1) Represents revenues related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Nine Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Revenues: Topic 606 revenues Gathering Natural gas $ 102.2 $ — $ — $ — $ 102.2 Crude oil 28.0 — — — 28.0 Water 41.3 — — — 41.3 Processing Natural gas 8.1 — — — 8.1 NGLs — — 6.1 — 6.1 Compression Natural gas 22.5 — — — 22.5 Storage Crude oil 1.3 2.6 — (0.9 ) 3.0 NGLs — — 7.4 — 7.4 Pipeline Crude oil — 4.7 — (1.6 ) 3.1 Transportation Crude oil 2.1 — 4.4 — 6.5 NGLs — — 26.0 — 26.0 Water — — 0.2 — 0.2 Rail Loading Crude oil — 11.5 — (3.8 ) 7.7 NGLs — — 3.1 — 3.1 Product Sales Natural gas 38.7 — 48.4 (10.6 ) 76.5 Crude oil 667.9 — 725.4 (112.4 ) 1,280.9 NGLs 67.5 — 1,003.1 (18.5 ) 1,052.1 Other — 1.1 — (0.8 ) 0.3 Total Topic 606 revenues 979.6 19.9 1,824.1 (148.6 ) 2,675.0 Non-Topic 606 revenues (1) — — 210.7 — 210.7 Total revenues $ 979.6 $ 19.9 $ 2,034.8 $ (148.6 ) $ 2,885.7 (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 Nine Months Ended September 30, September 30, 2018 2017 2018 2017 Net income (loss) $ (7.8 ) $ (29.8 ) $ 1.1 $ (53.1 ) Add: Interest and debt expense, net 25.1 24.2 73.8 74.8 Loss on modification/extinguishment of debt — — — 37.7 Provision for income taxes — 0.1 0.1 — Depreciation, amortization and accretion 42.7 50.9 137.9 153.5 EBITDA $ 60.0 $ 45.4 $ 212.9 $ 212.9
Summary Of Segment Information	Crestwood Midstream Three Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 242.3 $ 3.5 $ 684.4 $ — $ 930.2 Intersegment revenues 54.8 2.6 (57.4 ) — — Costs of product/services sold 205.1 (0.1 ) 622.5 — 827.5 Operations and maintenance expense 17.2 0.7 11.7 — 29.6 General and administrative expense — — — 24.6 24.6 Gain (loss) on long-lived assets, net (2.2 ) — (2.5 ) 1.1 (3.6 ) Earnings from unconsolidated affiliates, net 5.6 9.5 — — 15.1 EBITDA $ 78.2 $ 15.0 $ (9.7 ) $ (23.5 ) $ 60.0 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,825.0 $ 1,015.3 $ 673.1 $ 23.0 $ 4,536.4 Three Months Ended September 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 434.4 $ 6.2 $ 515.0 $ — $ 955.6 Intersegment revenues 29.9 1.2 (31.1 ) — — Costs of product/services sold 378.6 0.2 479.7 — 858.5 Operations and maintenance expense 16.2 1.0 18.3 — 35.5 General and administrative expense — — — 21.4 21.4 Gain (loss) on long-lived assets, net (3.9 ) — 0.6 (3.0 ) (6.3 ) Earnings from unconsolidated affiliates, net 4.3 7.2 — — 11.5 EBITDA $ 69.9 $ 13.4 $ (13.5 ) $ (24.4 ) $ 45.4 Nine Months Ended September 30, 2018 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 838.1 $ 12.8 $ 2,034.8 $ — $ 2,885.7 Intersegment revenues 141.5 7.1 (148.6 ) — — Costs of product/services sold 701.6 0.1 1,817.0 — 2,518.7 Operations and maintenance expense 52.7 2.3 41.0 — 96.0 General and administrative expense — — — 69.9 69.9 Gain (loss) on long-lived assets, net (2.1 ) — (26.7 ) 1.1 (27.7 ) Earnings from unconsolidated affiliates, net 15.8 23.7 — — 39.5 EBITDA $ 239.0 $ 41.2 $ 1.5 $ (68.8 ) $ 212.9 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 2,825.0 $ 1,015.3 $ 673.1 $ 23.0 $ 4,536.4 Nine Months Ended September 30, 2017 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 1,208.1 $ 24.7 $ 1,401.2 $ — $ 2,634.0 Intersegment revenues 94.3 4.7 (99.0 ) — — Costs of product/services sold 1,049.9 0.3 1,221.4 — 2,271.6 Operations and maintenance expense 51.8 3.4 48.2 — 103.4 General and administrative expense — — — 69.0 69.0 Gain (loss) on long-lived assets (3.9 ) — 0.6 (3.0 ) (6.3 ) Earnings from unconsolidated affiliates, net 7.7 21.5 — — 29.2 EBITDA $ 204.5 $ 47.2 $ 33.2 $ (72.0 ) $ 212.9

Condensed Consolidating Finan_2

Condensed Consolidating Financial Information (Tables)	9 Months Ended
	Sep. 30, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheet	Crestwood Midstream Partners LP Condensed Consolidating Balance Sheet September 30, 2018 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Assets Current assets: Cash $ 2.0 $ — $ — $ — $ 2.0 Accounts receivable — 344.3 5.7 — 350.0 Inventory — 91.8 — — 91.8 Other current assets — 83.1 — — 83.1 Total current assets 2.0 519.2 5.7 — 526.9 Property, plant and equipment, net — 2,137.5 — — 2,137.5 Goodwill and intangible assets, net — 702.8 — — 702.8 Investment in consolidated affiliates 3,745.9 — — (3,745.9 ) — Investment in unconsolidated affiliates — — 1,166.9 — 1,166.9 Other non-current assets — 2.3 — — 2.3 Total assets $ 3,747.9 $ 3,361.8 $ 1,172.6 $ (3,745.9 ) $ 4,536.4 Liabilities and partners’ capital Current liabilities: Accounts payable $ — $ 319.2 $ — $ — $ 319.2 Other current liabilities 38.8 118.8 — — 157.6 Total current liabilities 38.8 438.0 — — 476.8 Long-term liabilities: Long-term debt, less current portion 1,675.1 — — — 1,675.1 Other long-term liabilities — 112.4 57.0 — 169.4 Deferred income taxes — 0.6 — — 0.6 Partners’ capital 2,034.0 2,810.8 935.1 (3,745.9 ) 2,034.0 Interest of non-controlling partners in subsidiary — — 180.5 — 180.5 Total partners’ capital 2,034.0 2,810.8 1,115.6 (3,745.9 ) 2,214.5 Total liabilities and partners’ capital $ 3,747.9 $ 3,361.8 $ 1,172.6 $ (3,745.9 ) $ 4,536.4 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 non-current 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 September 30, 2018 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 930.2 $ — $ — $ 930.2 Costs of product/services sold — 827.5 — — 827.5 Operating expenses and other: Operations and maintenance — 29.6 — — 29.6 General and administrative 14.3 10.3 — — 24.6 Depreciation, amortization and accretion — 42.7 — — 42.7 Loss on long-lived assets, net — 3.6 — — 3.6 14.3 86.2 — — 100.5 Operating income (loss) (14.3 ) 16.5 — — 2.2 Earnings from unconsolidated affiliates, net — — 15.1 — 15.1 Interest and debt expense, net (25.1 ) — — — (25.1 ) Equity in net income (loss) of subsidiaries 27.5 — — (27.5 ) — Net income (loss) (11.9 ) 16.5 15.1 (27.5 ) (7.8 ) Net income attributable to non-controlling partners in subsidiaries — — 4.1 — 4.1 Net income (loss) attributable to Crestwood Midstream Partners LP $ (11.9 ) $ 16.5 $ 11.0 $ (27.5 ) $ (11.9 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended September 30, 2017 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 955.6 $ — $ — $ 955.6 Costs of product/services sold — 858.5 — — 858.5 Operating expenses: Operations and maintenance — 35.5 — — 35.5 General and administrative 15.2 6.2 — — 21.4 Depreciation, amortization and accretion — 50.9 — — 50.9 Loss on long-lived assets, net — 6.3 — — 6.3 15.2 98.9 — — 114.1 Operating loss (15.2 ) (1.8 ) — — (17.0 ) Earnings from unconsolidated affiliates, net — — 11.5 — 11.5 Interest and debt expense, net (24.2 ) — — — (24.2 ) Equity in net income (loss) of subsidiaries 3.2 — — (3.2 ) — Income (loss) before income taxes (36.2 ) (1.8 ) 11.5 (3.2 ) (29.7 ) Provision for income taxes — (0.1 ) — — (0.1 ) Net income (loss) (36.2 ) (1.9 ) 11.5 (3.2 ) (29.8 ) Net income attributable to non-controlling partners in subsidiaries — — 6.4 — 6.4 Net income (loss) attributable to Crestwood Midstream Partners LP $ (36.2 ) $ (1.9 ) $ 5.1 $ (3.2 ) $ (36.2 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Nine Months Ended September 30, 2018 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 2,885.7 $ — $ — $ 2,885.7 Costs of product/services sold — 2,518.7 — — 2,518.7 Operating expenses and other: Operations and maintenance — 96.0 — — 96.0 General and administrative 42.0 27.9 — — 69.9 Depreciation, amortization and accretion — 137.9 — — 137.9 Loss on long-lived assets, net — 27.7 — — 27.7 42.0 289.5 — — 331.5 Operating income (loss) (42.0 ) 77.5 — — 35.5 Earnings from unconsolidated affiliates, net — — 39.5 — 39.5 Interest and debt expense, net (73.8 ) — — — (73.8 ) Equity in net income (loss) of subsidiaries 104.8 — — (104.8 ) — Income (loss) before income taxes (11.0 ) 77.5 39.5 (104.8 ) 1.2 Provision for income taxes — (0.1 ) — — (0.1 ) Net income (loss) (11.0 ) 77.4 39.5 (104.8 ) 1.1 Net income attributable to non-controlling partners in subsidiaries — — 12.1 — 12.1 Net income (loss) attributable to Crestwood Midstream Partners LP $ (11.0 ) $ 77.4 $ 27.4 $ (104.8 ) $ (11.0 ) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Nine Months Ended September 30, 2017 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Revenues $ — $ 2,634.0 $ — $ — $ 2,634.0 Costs of product/services sold — 2,271.6 — — 2,271.6 Operating expenses: Operations and maintenance — 103.4 — — 103.4 General and administrative 50.1 18.9 — — 69.0 Depreciation, amortization and accretion — 153.5 — — 153.5 Loss on long-lived assets, net — 6.3 — — 6.3 50.1 282.1 — — 332.2 Operating income (loss) (50.1 ) 80.3 — — 30.2 Earnings from unconsolidated affiliates, net — — 29.2 — 29.2 Interest and debt expense, net (74.8 ) — — — (74.8 ) Loss on modification/extinguishment of debt (37.7 ) — — — (37.7 ) Equity in net income (loss) of subsidiaries 90.7 — — (90.7 ) — Net income (loss) (71.9 ) 80.3 29.2 (90.7 ) (53.1 ) Net income attributable to non-controlling partners in subsidiaries — — 18.8 — 18.8 Net income (loss) attributable to Crestwood Midstream Partners LP $ (71.9 ) $ 80.3 $ 10.4 $ (90.7 ) $ (71.9 )
Condensed Cash Flow Statement	Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Nine Months Ended September 30, 2018 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Cash flows from operating activities $ (92.1 ) $ 262.1 $ 36.4 $ — $ 206.4 Cash flows from investing activities: Purchases of property, plant and equipment (3.7 ) (202.0 ) — — (205.7 ) Investment in unconsolidated affiliates — — (27.7 ) — (27.7 ) Capital distributions from unconsolidated affiliates — — 34.6 — 34.6 Net proceeds from sale of assets — 8.6 — — 8.6 Capital distributions from consolidated affiliates 36.7 — — (36.7 ) — Net cash provided by (used in) investing activities 33.0 (193.4 ) 6.9 (36.7 ) (190.2 ) Cash flows from financing activities: Proceeds from the issuance of long-term debt 1,152.1 — — — 1,152.1 Payments on long-term debt (972.8 ) (0.9 ) — — (973.7 ) Payments on capital leases — (1.1 ) — — (1.1 ) Distributions to partners (179.0 ) — (6.6 ) — (185.6 ) Distributions to parent — — (36.7 ) 36.7 — Taxes paid for unit-based compensation vesting — (6.9 ) — — (6.9 ) Change in intercompany balances 59.8 (59.8 ) — — — Net cash provided by (used in) financing activities 60.1 (68.7 ) (43.3 ) 36.7 (15.2 ) Net change in cash 1.0 — — — 1.0 Cash at beginning of period 1.0 — — — 1.0 Cash at end of period $ 2.0 $ — $ — $ — $ 2.0 Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Nine Months Ended September 30, 2017 (in millions) (unaudited) Parent Guarantor Subsidiaries Non- Guarantor Subsidiaries Eliminations Consolidated Cash flows from operating activities $ (102.6 ) $ 312.0 $ 23.5 $ — $ 232.9 Cash flows from investing activities: Purchases of property, plant and equipment (5.8 ) (128.6 ) — — (134.4 ) Investment in unconsolidated affiliates — — (46.5 ) — (46.5 ) Capital distributions from unconsolidated affiliates — — 35.3 — 35.3 Net proceeds from sale of assets — 1.3 — — 1.3 Capital distributions from consolidated affiliates 0.9 — — (0.9 ) — Net cash used in investing activities (4.9 ) (127.3 ) (11.2 ) (0.9 ) (144.3 ) Cash flows from financing activities: Proceeds from the issuance of long-term debt 2,209.8 — — — 2,209.8 Payments on long-term debt (2,157.9 ) (1.3 ) — — (2,159.2 ) Payments on capital leases — (2.2 ) — — (2.2 ) Payments for debt-related deferred costs (1.0 ) — — — (1.0 ) Distributions to partners (119.5 ) — (11.4 ) — (130.9 ) Distributions to parent — — (0.9 ) 0.9 — Taxes paid for unit-based compensation vesting — (5.3 ) — — (5.3 ) Change in intercompany balances 175.9 (175.9 ) — — — Net cash provided by (used in) financing activities 107.3 (184.7 ) (12.3 ) 0.9 (88.8 ) Net change in cash (0.2 ) — — — (0.2 ) Cash at beginning of period 1.3 — — — 1.3 Cash at end of period $ 1.1 $ — $ — $ — $ 1.1

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	Jan. 01, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Revenues		$ 930.2	$ 955.6	$ 2,885.7	$ 2,634
Property, plant and equipment, net		1,961.5		1,961.5		$ 1,820.8
Contract with Customer, Liability, Revenue Recognized		3.1		9.3
Deferred Revenue						0.6
Revenue, Remaining Performance Obligation, Current Year		12.2		12.2
Revenue, Remaining Performance Obligation, Year Two		27.7		27.7
Revenue, Remaining Performance Obligation, Year Three		23.5		23.5
Revenue, Remaining Performance Obligation, Year Four		9.4		9.4
Revenue, Remaining Performance Obligation, Year Five		7.3		7.3
Revenue, Remaining Performance Obligation, Thereafter		10.6		10.6
Revenue, Remaining Performance Obligation, Amount		90.7		90.7
Contract Assets (Non-current)	$ 1.1	1		1
Contract Liabilities (Current)	12.2	12.7		12.7
Contract Liabilities (Non-current)	60.6	64.2		64.2
ASC 606 accounts receivable		$ 323.8		$ 323.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		13 years		13 years
Depreciation, amortization and accretion		$ 39.2	48.1	$ 128.8	145.2
Earnings from unconsolidated affiliates, net		15.1	11.5	39.5	29.2
Net income (loss)		(5.2)	(27.9)	7.4	(47)
Property, plant and equipment		2,505.2		2,505.2		2,285.2
Accumulated depreciation and depletion		543.7		543.7		464.4
Investments in unconsolidated affiliates		1,166.9		1,166.9		1,183
Accrued expenses and other liabilities		114.1		114.1		105.9
Other long-term liabilities		172		172		104.7
Crestwood Equity Partners LP partners' capital		1,243.4		1,243.4		1,393.5
Partners' capital		1,855.4		1,855.4		2,005.5
Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Revenues		930.2	955.6	2,885.7	2,634
Property, plant and equipment, net		2,137.5		2,137.5		2,007.5
Depreciation, amortization and accretion		42.7	50.9	137.9	153.5
Earnings from unconsolidated affiliates, net		15.1	11.5	39.5	29.2
Net income (loss)		(7.8)	(29.8)	1.1	(53.1)
Property, plant and equipment		2,835.2		2,835.2		2,615.3
Accumulated depreciation and depletion		697.7		697.7		607.8
Investments in unconsolidated affiliates		1,166.9		1,166.9		1,183
Accrued expenses and other liabilities		113.2		113.2		104.7
Other long-term liabilities		169.4		169.4		102.6
Partners' capital		2,034		2,034		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]
Depreciation, amortization and accretion		1.2		3.7
Earnings from unconsolidated affiliates, net		(2.3)		(7.3)
Net income (loss)		(0.3)		(1.6)
Property, plant and equipment		113.5		113.5
Accumulated depreciation and depletion		15.9		15.9
Investments in unconsolidated affiliates		(16.8)		(16.8)
Accrued expenses and other liabilities		11.6		11.6
Other long-term liabilities		63.4		63.4
Crestwood Equity Partners LP partners' capital		5.9		5.9
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]
Depreciation, amortization and accretion		1.2		3.7
Earnings from unconsolidated affiliates, net		(2.3)		(7.3)
Net income (loss)		(0.3)		(1.6)
Property, plant and equipment		113.5		113.5
Accumulated depreciation and depletion		15.9		15.9
Investments in unconsolidated affiliates		(16.8)		(16.8)
Accrued expenses and other liabilities		11.6		11.6
Other long-term liabilities		63.4		63.4
Partners' capital		5.9		5.9
Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Depreciation, amortization and accretion		38		125.1
Earnings from unconsolidated affiliates, net		17.4		46.8
Net income (loss)		(4.9)		9
Property, plant and equipment		2,391.7		2,391.7
Accumulated depreciation and depletion		527.8		527.8
Investments in unconsolidated affiliates		1,183.7		1,183.7
Accrued expenses and other liabilities		102.5		102.5
Other long-term liabilities		108.6		108.6
Crestwood Equity Partners LP partners' capital		1,237.5		1,237.5
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]
Depreciation, amortization and accretion		41.5		134.2
Earnings from unconsolidated affiliates, net		17.4		46.8
Net income (loss)		(7.5)		2.7
Property, plant and equipment		2,721.7		2,721.7
Accumulated depreciation and depletion		681.8		681.8
Investments in unconsolidated affiliates		1,183.7		1,183.7
Accrued expenses and other liabilities		101.6		101.6
Other long-term liabilities		106		106
Partners' capital		2,028.1		2,028.1
Jackalope Gas Gathering Services, L.L.C.
Summary Of Significant Accounting Policies [Line Items]
Earnings from unconsolidated affiliates, net		4.5	1.5	11.3	5.5
Investments in unconsolidated affiliates		181.1		181.1		$ 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		2.3		7.3
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
Product
Summary Of Significant Accounting Policies [Line Items]
Revenues		845	855.3	2,620.2	2,325.4
Costs of product/services sold		770.8	843.3	2,391.5	2,223.7
Product | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Revenues		845	855.3	2,620.2	2,325.4
Costs of product/services sold		770.8	843.3	2,391.5	2,223.7
Product | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Costs of product/services sold		(282.1)		(716.9)
Product | 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]
Costs of product/services sold		(282.1)		(716.9)
Product | Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Costs of product/services sold		1,052.9		3,108.4
Product | 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]
Costs of product/services sold		1,052.9		3,108.4
Service
Summary Of Significant Accounting Policies [Line Items]
Revenues		85.2	100.3	265.5	308.6
Costs of product/services sold		11	11.5	36.2	36.1
Service | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Revenues		85.2	100.3	265.5	308.6
Costs of product/services sold		11	11.5	36.2	36.1
Gathering and Processing Segment
Summary Of Significant Accounting Policies [Line Items]
Revenues		242.3	434.4	838.1	1,208.1
Earnings from unconsolidated affiliates, net		5.6	4.3	15.8	7.7
Gathering and Processing Segment | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Revenues		242.3	434.4	838.1	1,208.1
Earnings from unconsolidated affiliates, net		5.6	4.3	15.8	7.7
Gathering and Processing Segment | Product
Summary Of Significant Accounting Policies [Line Items]
Revenues		173.5	353.3	632.6	971.7
Gathering and Processing Segment | Product | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Revenues		173.5	353.3	632.6	971.7
Gathering and Processing Segment | Product | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Revenues		(269.2)		(677)
Gathering and Processing Segment | Product | 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]
Revenues		(269.2)		(677)
Gathering and Processing Segment | Product | Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Revenues		442.7		1,309.6
Gathering and Processing Segment | Product | 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]
Revenues		442.7		1,309.6
Gathering and Processing Segment | Service
Summary Of Significant Accounting Policies [Line Items]
Revenues		68.8	80.6	205.4	235
Gathering and Processing Segment | Service | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Revenues		68.8	80.6	205.4	235
Gathering and Processing Segment | Service | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Revenues		(10)		(31.3)
Gathering and Processing Segment | Service | 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]
Revenues		(10)		(31.3)
Gathering and Processing Segment | Service | Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Revenues		78.8		236.7
Gathering and Processing Segment | Service | 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]
Revenues		78.8		236.7
Marketing Supply and Logistics
Summary Of Significant Accounting Policies [Line Items]
Revenues		684.4	515	2,034.8	1,401.2
Earnings from unconsolidated affiliates, net		0	0	0	0
Marketing Supply and Logistics | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Revenues		684.4	515	2,034.8	1,401.2
Earnings from unconsolidated affiliates, net		0	0	0	0
Marketing Supply and Logistics | Product
Summary Of Significant Accounting Policies [Line Items]
Revenues		671.5	502	1,987.6	1,353.7
Marketing Supply and Logistics | Product | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Revenues		671.5	502	1,987.6	1,353.7
Marketing Supply and Logistics | Service
Summary Of Significant Accounting Policies [Line Items]
Revenues		12.6	13	46.4	47.5
Marketing Supply and Logistics | Service | Crestwood Midstream Partners LP
Summary Of Significant Accounting Policies [Line Items]
Revenues		12.6	$ 13	46.4	$ 47.5
Marketing Supply and Logistics | Service | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Revenues		0.3		0.8
Marketing Supply and Logistics | Service | 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]
Revenues		0.3		0.8
Marketing Supply and Logistics | Service | Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Revenues		12.3		45.6
Marketing Supply and Logistics | Service | 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]
Revenues		$ 12.3		$ 45.6

Assets Held for Sale (Details)

Assets Held for Sale (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 31, 2018	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds from sale of assets			$ 8.6	$ 1.3
Disposal Group, Including Discontinued Operation, Assets, Current		$ 69.3	69.3		$ 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		69.3	69.3
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		2.4	26.9
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		$ 61.8	$ 61.8
Subsequent Event | West Coast [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds from sale of assets	$ 70

Certain Balance Sheet Informa_3

Certain Balance Sheet Information (Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Accrued Expenses and Other Liabilities [Line Items]
Accrued expenses	$ 38.8	$ 56.6
Accrued property taxes	4.8	4.8
Tax payable	0.2	0.3
Interest payable	38.6	20.3
Accrued additions to property, plant and equipment	16.6	22.3
Capital leases	2.4	1
Deferred revenue	12.7	0.6
Total accrued expenses and other liabilities	114.1	105.9
Crestwood Midstream Partners LP
Accrued Expenses and Other Liabilities [Line Items]
Accrued expenses	37.9	55.5
Accrued property taxes	4.8	4.8
Tax payable	0.2	0.3
Interest payable	38.6	20.3
Accrued additions to property, plant and equipment	16.6	22.2
Capital leases	2.4	1
Deferred revenue	12.7	0.6
Total accrued expenses and other liabilities	$ 113.2	$ 104.7

Investments in Unconsolidated_3

Investments in Unconsolidated Affiliates Net Investments In and Earnings (Loss) from Unconsolidated Affiliates (Details) - USD ($) $ in Millions	Jan. 01, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jul. 01, 2018	Jun. 30, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Net proceeds from sale of assets				$ 8.6	$ 1.3
Investment		$ 1,166.9		1,166.9				$ 1,183
Earnings from unconsolidated affiliates, net		15.1	$ 11.5	39.5	29.2
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Investment		836.6		836.6				849.8
Earnings from unconsolidated affiliates, net		8.8	6.4	21.5	19
Difference between carrying amount and underlying equity		51.4		51.4		$ 0
Ownership percentage							35.00%
Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
Investment		181.1		181.1				184.9
Earnings from unconsolidated affiliates, net		4.5	1.5	11.3	5.5
Difference between carrying amount and underlying equity		0.4		0.4
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investment		36.9		36.9				37.8
Earnings from unconsolidated affiliates, net		0.1	0.3	0.5	1.5
Difference between carrying amount and underlying equity		25.6		25.6
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Investment		8.8		8.8				8.5
Earnings from unconsolidated affiliates, net		0.6	0.5	1.7	1
Difference between carrying amount and underlying equity		6		6
Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investment		103.5		103.5				$ 102
Earnings from unconsolidated affiliates, net		$ 1.1	$ 2.8	$ 4.5	$ 2.2
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, effect of adoption	$ 9.5
New Accounting Pronouncement, Equity Earnings Decrease		$ 2.3		$ 7.3

Investments in Unconsolidated_4

Investments in Unconsolidated Affiliates Summarized Financial Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Operating Revenues	$ 243.3	$ 251.7
Operating Expenses	160.5	162.1
Net Income	86.6	89.6
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	129.3	127.1
Operating Expenses	59.1	58.4
Net Income	70.2	68.8
Other Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Operating Revenues	114	124.6
Operating Expenses	101.4	103.7
Net Income	16.4	20.8
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Amortization	0.9	0.9
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Amortization	$ 0.4	$ 0.5

Investments in Unconsolidated_5

Investments in Unconsolidated Affiliates Distributions and Contributions (Details) - USD ($) $ in Millions	Jun. 21, 2017	Oct. 31, 2018	Sep. 30, 2018	Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			$ 73.8	$ 62
Payments to acquire equity method investments			27.7	46.5
Payments to Acquire Equity Method Investments Cash and Noncash Consideration				115.9
Contribution of Property	$ 69.4
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			34.7	35.7
Payments to acquire equity method investments			0	0
Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			23.2	19.4
Payments to acquire equity method investments			17.6	2.9
Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			10.6	0
Payments to acquire equity method investments			7.6
Payments to Acquire Equity Method Investments Cash and Noncash Consideration				113
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			3.9	5.8
Payments to acquire equity method investments			2.5	0
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			1.4	1.1
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		$ 13.9
Subsequent Event | Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		4.1
Subsequent Event | Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		$ 1.4

Investments in Unconsolidated_6

Investments in Unconsolidated Affiliates Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Estimated cost to build		$ 180
Payments to Acquire Property, Plant, and Equipment		$ 205.7	$ 134.4
Crestwood Permian Basin LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%
Crestwood Permian Basin Holdings 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	$ 57			$ 57
Ownership percentage				35.00%
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		$ 205.7	$ 134.4
SWEPI LP | Crestwood Permian Basin Holdings
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 129.5
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	$ 2.3	$ 7.3

Risk Management (Risk Managemen

Risk Management (Risk Management Activities) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Revenue	$ 79.9	$ 36.4	$ 210.7	$ 109.5
Commodity contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments not designated as hedging	$ (16.7)	$ (24.1)	$ (15.3)	$ (22.6)

Risk Management (Notional Amoun

Risk Management (Notional Amounts and Terms of Company's Derivative Financial Instruments) (Details) bbl in Millions, Mcf in Millions	Sep. 30, 2018bblMcf	Dec. 31, 2017bblMcf
Propane Crude And Heating Oil | Fixed Price Payor
Derivative [Line Items]
Derivative, notional amount | bbl	17.6	15.3
Propane Crude And Heating Oil | Fixed Price Receiver
Derivative [Line Items]
Derivative, notional amount | bbl	20.7	17.5
Natural Gas [Member] | Fixed Price Payor
Derivative [Line Items]
Derivative, notional amount | Mcf	1,760	780
Natural Gas [Member] | Fixed Price Receiver
Derivative [Line Items]
Derivative, notional amount | Mcf	1,730	660

Risk Management (Narrative) (De

Risk Management (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative [Line Items]
Collateral posted for commodity derivative instruments	$ 5.7		$ 5.7		$ 3.7
Commodity contract
Derivative [Line Items]
Gain (loss) on derivative instruments not designated as hedging	(16.7)	$ (24.1)	(15.3)	$ (22.6)
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	22.9		22.9		28.9
NYMEX Derivative Liability
Derivative [Line Items]
Derivative Asset	23.1		23.1		27.2
NYMEX Margin Deposit
Derivative [Line Items]
NYMEX margin deposits	$ 5.2		$ 5.2		$ 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	Sep. 30, 2018	Dec. 31, 2017
Senior Notes, 2023
Debt Instrument [Line Items]
Carrying amount	$ 693.2	$ 692.1
Fair value	725	728.8
Senior Notes, 2025
Debt Instrument [Line Items]
Carrying amount	493.1	492.3
Fair value	$ 511.8	$ 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	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	$ 112.4	$ 103.3
SPH units	3.4	3.5
Assets, Fair Value Disclosure, Excluding Netting Adjustments	115.8	106.8
Netting agreements	(86.7)	(74.6)
Derivative Asset, Fair Value of Collateral	(18.1)	(21.5)
Assets from price risk management, total	7.6	7.2
Total assets at fair value	11	10.7
Liabilities from price risk management	124.7	119.6
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	124.7	119.6
Netting agreements	(86.7)	(74.6)
Derivative Liability, Fair Value of Collateral	5.5	3.9
Liabilities from price risk management, total	43.5	48.9
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	5.2	1.1
SPH units	3.4	3.5
Assets, Fair Value Disclosure, Excluding Netting Adjustments	8.6	4.6
Liabilities from price risk management	5.4	1.4
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	5.4	1.4
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	107.2	102.2
SPH units	0	0
Assets, Fair Value Disclosure, Excluding Netting Adjustments	107.2	102.2
Liabilities from price risk management	119.3	118.2
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	119.3	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 ($)	Sep. 30, 2018	Dec. 31, 2017	Mar. 31, 2017
Debt Instrument [Line Items]
Deferred finance costs, net	$ 23,000,000	$ 28,400,000
Total debt	1,676,000,000	1,492,200,000
Less: current portion	900,000	900,000
Total long-term debt, less current portion	1,675,100,000	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	1,500,000	2,400,000
Revolving Credit Facility | Crestwood Midstream Revolver
Debt Instrument [Line Items]
Credit agreement outstanding carrying value	497,500,000	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	1,675,100,000	1,491,300,000
Crestwood Midstream Partners LP | Senior Notes, 2023
Debt Instrument [Line Items]
Senior notes	693,200,000	692,100,000
Crestwood Midstream Partners LP | Senior Notes, 2025
Debt Instrument [Line Items]
Senior notes	$ 493,100,000	$ 492,300,000

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Detail)	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)	Mar. 31, 2017USD ($)
Debt Instrument [Line Items]
Senior Secured Leverage Ratio		1.23		1.23
Loss on modification/extinguishment of debt		$ 0	$ 0	$ 0	$ 37,700,000
Senior Secured Leverage Ratio, maximum		3.75		3.75
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		78,000,000		$ 78,000,000		52,200,000
Debt Instrument, Unused Borrowing Capacity, Amount		526,100,000		526,100,000
Credit agreement outstanding carrying value		$ 497,500,000		$ 497,500,000		$ 318,200,000
Total Funded Debt to Consolidated Ebitda				4.20
Consolidated Ebitda To Consolidated Interest Expense				4.34
Debt, Weighted Average Interest Rate		4.72%		4.72%		4.11%
Interest Coverage Ratio Minimum				2.50
Crestwood Midstream Revolver | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate		4.62%		4.62%		3.94%
Crestwood Midstream Revolver | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate		6.75%		6.75%		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	$ 0	0	$ 37,700,000
Crestwood Midstream Partners LP | Senior Notes, 2025
Debt Instrument [Line Items]
Senior notes		493,100,000		493,100,000		492,300,000
Crestwood Midstream Partners LP | Senior Notes, 2023
Debt Instrument [Line Items]
Senior notes		$ 693,200,000		$ 693,200,000		$ 692,100,000
Subsequent Event | Revolving Credit Facility
Debt Instrument [Line Items]
Debt Instrument, Term	5 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,250,000,000
Subsequent Event | Federal Funds Rate | Revolving Credit Facility | Crestwood Midstream Revolver
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Subsequent Event | Eurodollar | Revolving Credit Facility | Crestwood Midstream Credit Facility [Member] | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Subsequent Event | Eurodollar | Revolving Credit Facility | Crestwood Midstream Credit Facility [Member] | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.50%
Subsequent Event | Eurodollar | Revolving Credit Facility | Crestwood Midstream Revolver
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Subsequent Event | Eurodollar | Revolving Credit Facility | Crestwood Midstream Revolver | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Subsequent Event | Eurodollar | Revolving Credit Facility | Crestwood Midstream Revolver | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%

Earnings Per Limited Partner _3

Earnings Per Limited Partner Unit (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 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	7,125,744	7,125,744	6,968,210
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	5,112,277	7,277,340	5,080,952	7,277,340
Performance Shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Units excluded from dilutive earnings per share	335,856	355,934	341,012	305,934
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

Aug. 14, 2018

Aug. 07, 2018

May 15, 2018

May 08, 2018

Feb. 14, 2018

Feb. 07, 2018

Aug. 14, 2017

Aug. 07, 2017

May 15, 2017

May 08, 2017

Feb. 14, 2017

Feb. 07, 2017

Sep. 30, 2018

Sep. 30, 2017

Distribution Made to Limited Partner [Line Items]

Distribution Made to Limited Partner, Date of Record

Aug. 7, 2018

May 8, 2018

Feb. 7, 2018

Aug. 7, 2017

May 8, 2017

Feb. 7, 2017

Distribution Made to Limited Partner, Distribution Date

Aug. 14, 2018

May 15, 2018

Feb. 14, 2018

Aug. 14, 2017

May 15, 2017

Feb. 14, 2017

Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit

$ 0.60

$ 0.60

$ 0.6

$ 0.60

$ 0.60

$ 0.6

Distribution Made to Limited Partner, Cash Distributions Paid

$ 42.7

$ 42.7

$ 42.7

$ 41.8

$ 41.8

$ 41.8

$ 128.1

$ 125.4

Partners' Capital (Components o

Partners' Capital (Components of Net Income (Loss) Attributable to Non-Controlling Interests) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Distribution Made to Limited Partner [Line Items]
Payments of Ordinary Dividends, Noncontrolling Interest			$ 6.6	$ 11.4
Net income attributable to non-controlling partners in subsidiaries	$ (4.1)	$ (6.4)	(12.1)	(18.8)
Crestwood Midstream Partners LP
Distribution Made to Limited Partner [Line Items]
Net income attributable to non-controlling partners in subsidiaries	(4.1)	(6.4)	(12.1)	(18.8)
Crestwood Niobrara LLC
Distribution Made to Limited Partner [Line Items]
Payments of Ordinary Dividends, Noncontrolling Interest			6.6	11.4
Net income attributable to non-controlling partners in subsidiaries	$ 4.1	$ 6.4	$ 12.1	$ 18.8

Partners' Capital Schedule of U

Partners' Capital Schedule of Unit Issuances and Net Proceeds (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement of Partners' Capital [Abstract]
Equity Offering Program Authorized Amount	$ 250
Partners' Capital Account, Units, Sold in Public Offering	0	437,518
Equity Distribution Program Management Fee Percentage	2.00%
Proceeds from Issuance or Sale of Equity		$ 10.6
Payments of Stock Issuance Costs		$ 0.2

Partners' Capital (Narrative) (

Partners' Capital (Narrative) (Details) - USD ($)

Nov. 14, 2018

Nov. 07, 2018

Oct. 18, 2018

Aug. 14, 2018

Aug. 07, 2018

May 15, 2018

May 08, 2018

Feb. 14, 2018

Feb. 07, 2018

Aug. 14, 2017

Aug. 07, 2017

May 15, 2017

May 08, 2017

Feb. 14, 2017

Feb. 07, 2017

Oct. 31, 2018

Sep. 30, 2018

Sep. 30, 2017

Sep. 30, 2018

Sep. 30, 2017

Dec. 31, 2017

Distribution Made to Limited Partner [Line Items]

Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent

10.00%

Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount

$ 25,000

Distribution Made to Limited Partner, Distribution Date

Aug. 14, 2018

May 15, 2018

Feb. 14, 2018

Aug. 14, 2017

May 15, 2017

Feb. 14, 2017

Distribution Made to Limited Partner, Date of Record

Aug. 7, 2018

May 8, 2018

Feb. 7, 2018

Aug. 7, 2017

May 8, 2017

Feb. 7, 2017

Distributions to preferred unit holders

$ 45,000,000

$ 0

Preferred Units, Outstanding

71,257,445

71,257,445

71,257,445

Incentive Distribution, Distribution

$ 128,100,000

$ 125,400,000

Preferred Stock Dividends, Shares

4,724,030

Net Income (Loss) Attributable to Noncontrolling Interest

$ (4,100,000)

$ (6,400,000)

(12,100,000)

$ (18,800,000)

Dividends, Paid-in-kind

43,100,000

Payments of Ordinary Dividends, Noncontrolling Interest

6,600,000

11,400,000

Distribution Made to Limited Partner, Cash Distributions Paid

$ 42,700,000

$ 42,700,000

$ 42,700,000

$ 41,800,000

$ 41,800,000

$ 41,800,000

$ 128,100,000

125,400,000

Defined Contribution Plan, Employer Matching Contribution, Percent of Match

10.00%

Common Stock, Shares Authorized

1,500,000

1,500,000

Unit Purchase Plan, Shares Purchased Under Plan

$ 0

Crestwood Midstream Partners LP

Distribution Made to Limited Partner [Line Items]

Incentive Distribution, Distribution

$ 185,600,000

130,900,000

Net Income (Loss) Attributable to Noncontrolling Interest

$ (4,100,000)

(6,400,000)

(12,100,000)

(18,800,000)

Distribution Made to General Partner, Cash Distributions Paid

179,000,000

119,500,000

Crestwood Niobrara LLC

Distribution Made to Limited Partner [Line Items]

Net Income (Loss) Attributable to Noncontrolling Interest

$ 4,100,000

$ 6,400,000

12,100,000

18,800,000

Payments of Ordinary Dividends, Noncontrolling Interest

6,600,000

$ 11,400,000

Non-Controlling Partners

Distribution Made to Limited Partner [Line Items]

Net Income (Loss) Attributable to Noncontrolling Interest

$ (12,100,000)

Subsequent Event

Distribution Made to Limited Partner [Line Items]

Distribution Made to Limited Partner, Distribution Date

Nov. 14, 2018

Distribution Made to Limited Partner, Date of Record

Nov. 7, 2018

Distributions to preferred unit holders

$ 15,000,000

Subsequent Event | Crestwood Niobrara LLC

Distribution Made to Limited Partner [Line Items]

Payments of Ordinary Dividends, Noncontrolling Interest

$ 3,300,000

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) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Self Insurance Reserve	$ 12.8	$ 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
Crestwood Midstream Partners LP
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Self Insurance Reserve	11.2	$ 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 ($)	Sep. 30, 2018USD ($)	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		$ 2,000		$ 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		3,900
Minimum | Fort Berthold Indian Reservation
Site Contingency [Line Items]
Site Contingency, Loss Exposure in Excess of Accrual, Best Estimate		$ 2,000

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	$ 0.3	$ 0.5	$ 0.9	$ 1.4
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	8.2	6.6	22.2	16.4
Ascent Resources - Utica, LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP(1)	28.9		45.9
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP(1)	16.8		45.1
Affiliated Entity
Related Party Transaction [Line Items]
Related party receivables	6.2		6.2		$ 7.1
Revenues at CEQP and CMLP	0.3	0.5	0.9	1.4
Costs of product/services sold at CEQP and CMLP(1)	45.7	3.7	91	11.8
General and administrative expenses charged by CEQP to CMLP, net(3)	4.8	4.4	15.3	14.8
Related Party Transaction, Due from (to) Related Party [Abstract]
Accounts payable at CEQP	27.8		27.8		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)	(0.2)	(8.8)	(0.4)
Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	0.3	0.5	0.9	1.4
Crestwood Midstream Partners LP | Affiliated Entity
Related Party Transaction [Line Items]
General and administrative expenses charged by CEQP to CMLP, net(3)	0.8	0.8	2.4	2.3
Related Party Transaction, Due from (to) Related Party [Abstract]
Accounts payable at CEQP	25.3		25.3		$ 5
Crestwood LTIP | Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Allocated Share-based Compensation Expense	5.6	5.2	17.7	17.1
Crestwood LTIP | Crestwood Holdings
Related Party Transaction [Line Items]
Allocated Share-based Compensation Expense	4.8	1.1	10.2	1.9
Stagecoach Gas Services LLC
Related Party Transaction [Line Items]
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	1.8	2	6	6.5
Tres Palacios Holdings LLC
Related Party Transaction [Line Items]
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	0.9	0.8	2.9	2.6
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	5.1	3.7	12.6	7
Jackalope Gas Gathering Services, L.L.C.
Related Party Transaction [Line Items]
General and administrative expenses at CEQP charged from Crestwood Holdings, net(4)	$ 0.4	$ 0.1	$ 0.7	$ 0.3

Segments (Reconciliation of Net

Segments (Reconciliation of Net Income (Loss) to EBITDA) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)segment	Sep. 30, 2017USD ($)
Segment Reporting, Other Significant Reconciling Item [Line Items]
Number of Operating Segments | segment			3
Net income (loss)	$ (5.2)	$ (27.9)	$ 7.4	$ (47)
Interest and debt expense, net	25.1	24.2	73.8	74.8
Loss on modification/extinguishment of debt	0	0	0	37.7
Benefit for income taxes	0	0.1	0.2	0
Depreciation, amortization and accretion	39.2	48.1	128.8	145.2
EBITDA	59.1	44.5	210.2	210.7
Crestwood Midstream Partners LP
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income (loss)	(7.8)	(29.8)	1.1	(53.1)
Interest and debt expense, net	25.1	24.2	73.8	74.8
Loss on modification/extinguishment of debt	0	0	0	37.7
Benefit for income taxes	0	0.1	0.1	0
Depreciation, amortization and accretion	42.7	50.9	137.9	153.5
EBITDA	$ 60	$ 45.4	$ 212.9	$ 212.9

Segments (Summary Of Segment In

Segments (Summary Of Segment Information) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)segment	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Net income (loss)	$ (5.2)	$ (27.9)	$ 7.4	$ (47)
Interest and debt expense, net	25.1	24.2	73.8	74.8
Loss on modification/extinguishment of debt	0	0	$ 0	37.7
Number of Operating Segments | segment			3
Benefit for income taxes	0	0.1	$ 0.2	0
Depreciation, amortization and accretion	39.2	48.1	128.8	145.2
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	930.2	955.6	2,885.7	2,634
Intersegment Revenues	0	0	0	0
Costs of product/services sold	827.5	858.5	2,518.7	2,271.6
Operations and maintenance	29.6	35.5	96	103.4
General and administrative	25.5	22.5	72.8	71.6
Gain (loss) on long-lived assets	(3.6)	(6.3)	(27.7)	(6.3)
Earnings from unconsolidated affiliates, net	15.1	11.5	39.5	29.2
Other income, net		0.2	0.2	0.4
EBITDA	59.1	44.5	210.2	210.7
Goodwill	138.6		138.6		$ 147.6
Total assets	4,366.4		4,366.4		4,284.9
Gathering and Processing Operations
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	242.3	434.4	838.1	1,208.1
Intersegment Revenues	54.8	29.9	141.5	94.3
Costs of product/services sold	205.1	378.6	701.6	1,049.9
Operations and maintenance	17.2	16.2	52.7	51.8
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(2.2)	(3.9)	(2.1)	(3.9)
Earnings from unconsolidated affiliates, net	5.6	4.3	15.8	7.7
Other income, net		0	0	0
EBITDA	78.2	69.9	239	204.5
Goodwill	45.9		45.9
Total assets	2,647.8		2,647.8
Storage and Transportation
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	3.5	6.2	12.8	24.7
Intersegment Revenues	2.6	1.2	7.1	4.7
Costs of product/services sold	(0.1)	0.2	0.1	0.3
Operations and maintenance	0.7	1	2.3	3.4
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	0	0	0	0
Earnings from unconsolidated affiliates, net	9.5	7.2	23.7	21.5
Other income, net		0	0	0
EBITDA	15	13.4	41.2	47.2
Goodwill	0		0
Total assets	1,015.3		1,015.3
Marketing Supply and Logistics
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	684.4	515	2,034.8	1,401.2
Intersegment Revenues	(57.4)	(31.1)	(148.6)	(99)
Costs of product/services sold	622.5	479.7	1,817	1,221.4
Operations and maintenance	11.7	18.3	41	48.2
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(2.5)	0.6	(26.7)	0.6
Earnings from unconsolidated affiliates, net	0	0	0	0
Other income, net		0	0	0
EBITDA	(9.7)	(13.5)	1.5	33.2
Goodwill	92.7		92.7		101.7
Total assets	673.1		673.1
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	25.5	22.5	72.8	71.6
Gain (loss) on long-lived assets	1.1	(3)	1.1	(3)
Earnings from unconsolidated affiliates, net	0	0	0	0
Other income, net		0.2	0.2	0.4
EBITDA	(24.4)	(25.3)	(71.5)	(74.2)
Goodwill	0		0
Total assets	30.2		30.2
Crestwood Midstream Partners LP
Net income (loss)	(7.8)	(29.8)	1.1	(53.1)
Interest and debt expense, net	25.1	24.2	73.8	74.8
Loss on modification/extinguishment of debt	0	0	0	37.7
Benefit for income taxes	0	0.1	0.1	0
Depreciation, amortization and accretion	42.7	50.9	137.9	153.5
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	930.2	955.6	2,885.7	2,634
Intersegment Revenues	0	0	0	0
Costs of product/services sold	827.5	858.5	2,518.7	2,271.6
Operations and maintenance	29.6	35.5	96	103.4
General and administrative	24.6	21.4	69.9	69
Gain (loss) on long-lived assets	(3.6)	(6.3)	(27.7)	(6.3)
Earnings from unconsolidated affiliates, net	15.1	11.5	39.5	29.2
EBITDA	60	45.4	212.9	212.9
Goodwill	138.6		138.6		147.6
Total assets	4,536.4		4,536.4		$ 4,466.3
Crestwood Midstream Partners LP | Gathering and Processing Operations
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	242.3	434.4	838.1	1,208.1
Intersegment Revenues	54.8	29.9	141.5	94.3
Costs of product/services sold	205.1	378.6	701.6	1,049.9
Operations and maintenance	17.2	16.2	52.7	51.8
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(2.2)	(3.9)	(2.1)	(3.9)
Earnings from unconsolidated affiliates, net	5.6	4.3	15.8	7.7
EBITDA	78.2	69.9	239	204.5
Goodwill	45.9		45.9
Total assets	2,825		2,825
Crestwood Midstream Partners LP | Storage and Transportation
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	3.5	6.2	12.8	24.7
Intersegment Revenues	2.6	1.2	7.1	4.7
Costs of product/services sold	(0.1)	0.2	0.1	0.3
Operations and maintenance	0.7	1	2.3	3.4
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	0	0	0	0
Earnings from unconsolidated affiliates, net	9.5	7.2	23.7	21.5
EBITDA	15	13.4	41.2	47.2
Goodwill	0		0
Total assets	1,015.3		1,015.3
Crestwood Midstream Partners LP | Marketing Supply and Logistics
Segment Reporting Information, Additional Information [Abstract]
Operating revenues	684.4	515	2,034.8	1,401.2
Intersegment Revenues	(57.4)	(31.1)	(148.6)	(99)
Costs of product/services sold	622.5	479.7	1,817	1,221.4
Operations and maintenance	11.7	18.3	41	48.2
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(2.5)	0.6	(26.7)	0.6
Earnings from unconsolidated affiliates, net	0	0	0	0
EBITDA	(9.7)	(13.5)	1.5	33.2
Goodwill	92.7		92.7
Total assets	673.1		673.1
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	24.6	21.4	69.9	69
Gain (loss) on long-lived assets	1.1	(3)	1.1	(3)
Earnings from unconsolidated affiliates, net	0	0	0	0
EBITDA	(23.5)	$ (24.4)	(68.8)	$ (72)
Goodwill	0		0
Total assets	$ 23		$ 23

Segments (Narrative) (Details)

Segments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Interest, taxes, depreciation and amortization included in earnings from equity method investments	$ 10.8	$ 10	$ 30.4	$ 25.7

Segments Disaggregation of Reve

Segments Disaggregation of Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Revenue	$ 79.9	$ 36.4	$ 210.7	$ 109.5
Revenues	930.2	955.6	2,885.7	2,634
Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenues	242.3	434.4	838.1	1,208.1
Revenue including intersegment eliminations	297.1		979.6
Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenues	3.5	6.2	12.8	24.7
Revenue including intersegment eliminations	6.1		19.9
Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenues	684.4	$ 515	2,034.8	$ 1,401.2
Natural Gas Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	32.9		102.2
Natural Gas Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	32.9		102.2
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		28
Crude Oil Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	9.4		28
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	15.5		41.3
Water Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	15.5		41.3
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		8.1
Natural Gas Processing | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.7		8.1
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		6.1
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		6.1
Natural Gas Compression
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7		22.5
Natural Gas Compression | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7		22.5
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	0.8		3
Crude Oil Storage | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.4		1.3
Crude Oil Storage | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.8		2.6
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	1.9		7.4
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	1.9		7.4
Crude Oil Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.5		3.1
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	2.1		4.7
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	2.4		6.5
Crude Oil Transportation | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.9		2.1
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	1.5		4.4
NGL Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6.6		26
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	6.6		26
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	1.5		7.7
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	2.8		11.5
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	0.9		3.1
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	0.9		3.1
Natural Gas Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	41.2		76.5
Natural Gas Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13.4		38.7
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	31.7		48.4
Crude Oil Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	416		1,280.9
Crude Oil Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	190.3		667.9
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	268.8		725.4
NGL Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	307.9		1,052.1
NGL Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	24.6		67.5
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	291.1		1,003.1
Other revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.1		0.3
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	0.4		1.1
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	(57.4)		(148.6)
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	(0.4)		(0.9)
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	(0.6)		(1.6)
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	(1.3)		(3.8)
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	(3.9)		(10.6)
Intersegment Eliminations | Crude Oil Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(43.1)		(112.4)
Intersegment Eliminations | NGL Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(7.8)		(18.5)
Intersegment Eliminations | Other revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.3)		(0.8)
Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	850.3		2,675
Revenue from Contract with Customer | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	297.1		979.6
Revenue from Contract with Customer | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6.1		19.9
Revenue from Contract with Customer | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	604.5		1,824.1
Revenue from Contract with Customer | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(57.4)		(148.6)
Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Revenue	79.9		210.7
Product and Service, Other [Member] | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Revenue	0		0
Product and Service, Other [Member] | Storage and Transportation
Disaggregation of Revenue [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Revenue	0		0
Product and Service, Other [Member] | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Revenue	79.9		210.7
Product and Service, Other [Member] | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Revenue	$ 0		$ 0

Condensed Consolidating Finan_3

Condensed Consolidating Financial Information (Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash	$ 2.4	$ 1.3	$ 1.4		$ 1.6
Accounts receivable	352.3	442.7
Inventory	91.8	68.4
Total current assets	529.6	530.5
Property, plant and equipment, net	1,961.5	1,820.8
Investment	1,166.9	1,183
Other non-current assets	5.6	5.8
Total assets	4,366.4	4,284.9
Current liabilities:
Accounts payable	321.8	349.4
Total current liabilities	480.3	505.1
Long-term liabilities:
Long-term debt, less current portion	1,675.1	1,491.3
Other long-term liabilities	172	104.7
Deferred income taxes	3.1	3.3
Partners' capital	1,855.4	2,005.5
Interest of non-controlling partners in subsidiary	180.5	175
Total partners’ capital	2,035.9	2,180.5
Total liabilities and partners’ capital	4,366.4	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	(3,745.9)	(3,705.4)
Investment	0	0
Other non-current assets	0	0
Total assets	(3,745.9)	(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	(3,745.9)	(3,705.4)
Interest of non-controlling partners in subsidiary	0	0
Total partners’ capital	(3,745.9)	(3,705.4)
Total liabilities and partners’ capital	(3,745.9)	(3,705.4)
Parent Company, Crestwood Midstream Partners, LP | Reportable Legal Entities
Current assets:
Cash	2	1		1.1	1.3
Accounts receivable	0	0
Inventory	0	0
Other	0	0
Total current assets	2	1
Property, plant and equipment, net	0	0
Goodwill and intangible assets, net	0	0
Investment in consolidated affiliates	3,745.9	3,705.4
Investment	0	0
Other non-current assets	0	0
Total assets	3,747.9	3,706.4
Current liabilities:
Accounts payable	0	0
Other current liabilities	38.8	20.5
Total current liabilities	38.8	20.5
Long-term liabilities:
Long-term debt, less current portion	1,675.1	1,490.5
Other long-term liabilities	0	0
Deferred income taxes	0	0
Partners' capital	2,034	2,195.4
Interest of non-controlling partners in subsidiary	0	0
Total partners’ capital	2,034	2,195.4
Total liabilities and partners’ capital	3,747.9	3,706.4
Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash	0	0		0	0
Accounts receivable	344.3	439.7
Inventory	91.8	68.4
Other	83.1	18.1
Total current assets	519.2	526.2
Property, plant and equipment, net	2,137.5	2,007.5
Goodwill and intangible assets, net	702.8	743.3
Investment in consolidated affiliates	0	0
Investment	0	0
Other non-current assets	2.3	2.4
Total assets	3,361.8	3,279.4
Current liabilities:
Accounts payable	319.2	346.8
Other current liabilities	118.8	134
Total current liabilities	438	480.8
Long-term liabilities:
Long-term debt, less current portion	0	0.8
Other long-term liabilities	112.4	45.6
Deferred income taxes	0.6	0.7
Partners' capital	2,810.8	2,751.5
Interest of non-controlling partners in subsidiary	0	0
Total partners’ capital	2,810.8	2,751.5
Total liabilities and partners’ capital	3,361.8	3,279.4
Non-Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash	0	0		0	0
Accounts receivable	5.7	2.9
Inventory	0	0
Other	0	0
Total current assets	5.7	2.9
Property, plant and equipment, net	0	0
Goodwill and intangible assets, net	0	0
Investment in consolidated affiliates	0	0
Investment	1,166.9	1,183
Other non-current assets	0	0
Total assets	1,172.6	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	935.1	953.9
Interest of non-controlling partners in subsidiary	180.5	175
Total partners’ capital	1,115.6	1,128.9
Total liabilities and partners’ capital	1,172.6	1,185.9
Crestwood Midstream Partners LP
Current assets:
Cash	2	1		$ 1.1	$ 1.3
Accounts receivable	350	442.6
Inventory	91.8	68.4
Other	83.1	18.1
Total current assets	526.9	530.1
Property, plant and equipment, net	2,137.5	2,007.5
Goodwill and intangible assets, net	702.8	743.3
Investment in consolidated affiliates	0	0
Investment	1,166.9	1,183
Other non-current assets	2.3	2.4
Total assets	4,536.4	4,466.3
Current liabilities:
Accounts payable	319.2	346.8
Other current liabilities	157.6	154.5
Total current liabilities	476.8	501.3
Long-term liabilities:
Long-term debt, less current portion	1,675.1	1,491.3
Other long-term liabilities	169.4	102.6
Deferred income taxes	0.6	0.7
Partners' capital	2,034	2,195.4
Interest of non-controlling partners in subsidiary	180.5	175
Total partners’ capital	2,214.5	2,370.4
Total liabilities and partners’ capital	$ 4,536.4	$ 4,466.3

Condensed Consolidating Finan_4

Condensed Consolidating Financial Information (Statements Of Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues	$ 930.2	$ 955.6	$ 2,885.7	$ 2,634
Costs of product/services sold	827.5	858.5	2,518.7	2,271.6
Operating expenses and other:
Operations and maintenance	29.6	35.5	96	103.4
General and administrative	25.5	22.5	72.8	71.6
Depreciation, amortization and accretion	39.2	48.1	128.8	145.2
Loss on long-lived assets, net	3.6	6.3	27.7	6.3
Total expenses	97.9	112.4	325.3	326.5
Operating income (loss)	4.8	(15.3)	41.7	35.9
Earnings from unconsolidated affiliates, net	15.1	11.5	39.5	29.2
Interest and debt expense, net	(25.1)	(24.2)	(73.8)	(74.8)
Loss on modification/extinguishment of debt	0	0	0	(37.7)
Loss before income taxes	(5.2)	(27.8)	7.6	(47)
Provision for income taxes	0	(0.1)	(0.2)	0
Net income (loss)	(5.2)	(27.9)	7.4	(47)
Net income attributable to non-controlling partners in subsidiaries	4.1	6.4	12.1	18.8
Net income (loss) attributable to parent	(9.3)	(34.3)	(4.7)	(65.8)
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
Loss on long-lived assets, net	0	0	0	0
Total expenses	0	0	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
Loss from unconsolidated affiliates	(27.5)	(3.2)	(104.8)	(90.7)
Loss before income taxes		(3.2)	(104.8)
Provision for income taxes		0	0
Net income (loss)	(27.5)	(3.2)	(104.8)	(90.7)
Net income attributable to non-controlling partners in subsidiaries	0	0	0	0
Net income (loss) attributable to parent	(27.5)	(3.2)	(104.8)	(90.7)
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
Loss on long-lived assets, net	0	0	0	0
Total expenses	0	0	0	0
Operating income (loss)	0	0	0	0
Earnings from unconsolidated affiliates, net	15.1	11.5	39.5	29.2
Interest and debt expense, net	0	0	0	0
Loss on modification/extinguishment of debt				0
Loss from unconsolidated affiliates	0	0	0	0
Loss before income taxes		11.5	39.5
Provision for income taxes		0	0
Net income (loss)	15.1	11.5	39.5	29.2
Net income attributable to non-controlling partners in subsidiaries	4.1	6.4	12.1	18.8
Net income (loss) attributable to parent	11	5.1	27.4	10.4
Crestwood Midstream Partners LP
Revenues	930.2	955.6	2,885.7	2,634
Costs of product/services sold	827.5	858.5	2,518.7	2,271.6
Operating expenses and other:
Operations and maintenance	29.6	35.5	96	103.4
General and administrative	24.6	21.4	69.9	69
Depreciation, amortization and accretion	42.7	50.9	137.9	153.5
Loss on long-lived assets, net	3.6	6.3	27.7	6.3
Total expenses	100.5	114.1	331.5	332.2
Operating income (loss)	2.2	(17)	35.5	30.2
Earnings from unconsolidated affiliates, net	15.1	11.5	39.5	29.2
Interest and debt expense, net	(25.1)	(24.2)	(73.8)	(74.8)
Loss on modification/extinguishment of debt				(37.7)
Loss from unconsolidated affiliates	0	0	0	0
Loss before income taxes		(29.7)	1.2
Provision for income taxes		(0.1)	(0.1)
Net income (loss)	(7.8)	(29.8)	1.1	(53.1)
Net income attributable to non-controlling partners in subsidiaries	4.1	6.4	12.1	18.8
Net income (loss) attributable to parent	(11.9)	(36.2)	(11)	(71.9)
Guarantor Subsidiaries | Reportable Legal Entities
Revenues	930.2	955.6	2,885.7	2,634
Costs of product/services sold	827.5	858.5	2,518.7	2,271.6
Operating expenses and other:
Operations and maintenance	29.6	35.5	96	103.4
General and administrative	10.3	6.2	27.9	18.9
Depreciation, amortization and accretion	42.7	50.9	137.9	153.5
Loss on long-lived assets, net	3.6	6.3	27.7	6.3
Total expenses	86.2	98.9	289.5	282.1
Operating income (loss)	16.5	(1.8)	77.5	80.3
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
Loss from unconsolidated affiliates	0	0	0	0
Loss before income taxes		(1.8)	77.5
Provision for income taxes		(0.1)	(0.1)
Net income (loss)	16.5	(1.9)	77.4	80.3
Net income attributable to non-controlling partners in subsidiaries	0	0	0	0
Net income (loss) attributable to parent	16.5	(1.9)	77.4	80.3
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	14.3	15.2	42	50.1
Depreciation, amortization and accretion	0	0	0	0
Loss on long-lived assets, net	0	0	0	0
Total expenses	14.3	15.2	42	50.1
Operating income (loss)	(14.3)	(15.2)	(42)	(50.1)
Earnings from unconsolidated affiliates, net	0	0	0	0
Interest and debt expense, net	(25.1)	(24.2)	(73.8)	(74.8)
Loss on modification/extinguishment of debt				(37.7)
Loss from unconsolidated affiliates	27.5	3.2	104.8	90.7
Loss before income taxes		(36.2)	(11)
Provision for income taxes		0	0
Net income (loss)	(11.9)	(36.2)	(11)	(71.9)
Net income attributable to non-controlling partners in subsidiaries	0	0	0	0
Net income (loss) attributable to parent	$ (11.9)	$ (36.2)	$ (11)	$ (71.9)

Condensed Consolidating Finan_5

Condensed Consolidating Financial Information (Statements Of Cash Flows) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities	$ 200.9	$ 228.2
Cash flows from investing activities:
Purchases of property, plant and equipment	(205.7)	(134.4)
Investment in unconsolidated affiliates	(27.7)	(46.5)
Net proceeds from sale of assets	8.6	1.3
Proceeds from Equity Method Investment, Distribution, Return of Capital	34.6	35.3
Net cash used in investing activities	(190.2)	(144.3)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	1,152.1	2,209.8
Payments on long-term debt	(973.7)	(2,159.2)
Payments on capital leases	(1.1)	(2.2)
Payments for debt-related deferred costs	0	(1)
Distributions to partners	(128.1)	(125.4)
Taxes paid for unit-based compensation vesting	(6.9)	(5.3)
Other	(0.3)	0
Net cash provided by (used in) financing activities	(9.6)	(84.1)
Net change in cash	1.1	(0.2)
Cash at beginning of period	1.3	1.6
Cash at end of period	2.4	1.4
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	(36.7)	(0.9)
Proceeds from Equity Method Investment, Distribution, Return of Capital	0	0
Net cash used in investing activities	(36.7)	(0.9)
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	36.7	0.9
Taxes paid for unit-based compensation vesting	0	0
Change in intercompany balances	0	0
Net cash provided by (used in) financing activities	36.7	0.9
Net change in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	0
Non-Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities	36.4	23.5
Cash flows from investing activities:
Purchases of property, plant and equipment	0	0
Investment in unconsolidated affiliates	(27.7)	(46.5)
Net proceeds from sale of assets	0	0
Capital distributions from consolidated affiliates	0	0
Proceeds from Equity Method Investment, Distribution, Return of Capital	34.6	35.3
Net cash used in investing activities	6.9	(11.2)
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	(6.6)	(11.4)
Contributions from (distributions to) parent	(36.7)	(0.9)
Taxes paid for unit-based compensation vesting	0	0
Change in intercompany balances	0	0
Net cash provided by (used in) financing activities	(43.3)	(12.3)
Net change in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	0
Parent Company, Crestwood Midstream Partners, LP | Reportable Legal Entities
Cash flows from operating activities	(92.1)	(102.6)
Cash flows from investing activities:
Purchases of property, plant and equipment	(3.7)	(5.8)
Investment in unconsolidated affiliates	0	0
Net proceeds from sale of assets	0	0
Capital distributions from consolidated affiliates	36.7	0.9
Proceeds from Equity Method Investment, Distribution, Return of Capital	0	0
Net cash used in investing activities	33	(4.9)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	1,152.1	2,209.8
Payments on long-term debt	(972.8)	(2,157.9)
Payments on capital leases	0	0
Payments for debt-related deferred costs		(1)
Distributions to partners	(179)	(119.5)
Contributions from (distributions to) parent	0	0
Taxes paid for unit-based compensation vesting	0	0
Change in intercompany balances	59.8	175.9
Net cash provided by (used in) financing activities	60.1	107.3
Net change in cash	1	(0.2)
Cash at beginning of period	1	1.3
Cash at end of period	2
Crestwood Midstream Partners LP
Cash flows from operating activities	206.4	232.9
Cash flows from investing activities:
Purchases of property, plant and equipment	(205.7)	(134.4)
Investment in unconsolidated affiliates	(27.7)	(46.5)
Net proceeds from sale of assets	8.6	1.3
Capital distributions from consolidated affiliates	0	0
Proceeds from Equity Method Investment, Distribution, Return of Capital	34.6	35.3
Net cash used in investing activities	(190.2)	(144.3)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	1,152.1	2,209.8
Payments on long-term debt	(973.7)	(2,159.2)
Payments on capital leases	(1.1)	(2.2)
Payments for debt-related deferred costs		(1)
Distributions to partners	(185.6)	(130.9)
Contributions from (distributions to) parent	0	0
Taxes paid for unit-based compensation vesting	(6.9)	(5.3)
Change in intercompany balances	0	0
Net cash provided by (used in) financing activities	(15.2)	(88.8)
Net change in cash	1	(0.2)
Cash at beginning of period	1	1.3
Cash at end of period	2
Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities	262.1	312
Cash flows from investing activities:
Purchases of property, plant and equipment	(202)	(128.6)
Investment in unconsolidated affiliates	0	0
Net proceeds from sale of assets	8.6	1.3
Capital distributions from consolidated affiliates	0	0
Proceeds from Equity Method Investment, Distribution, Return of Capital	0	0
Net cash used in investing activities	(193.4)	(127.3)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0	0
Payments on long-term debt	(0.9)	(1.3)
Payments on capital leases	(1.1)	(2.2)
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)	(5.3)
Change in intercompany balances	(59.8)	(175.9)
Net cash provided by (used in) financing activities	(68.7)	(184.7)
Net change in cash	0	0
Cash at beginning of period	0	$ 0
Cash at end of period	$ 0