Crestwood Equity Partners (CEQP+) 10-Q 29 Oct 20 2020 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Oct. 23, 2020
Document Information [Line Items]
Document Transition Report	false
Document Quarterly Report	true
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Entity Address, Address Line One	811 Main Street
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Registrant Name	Crestwood Equity Partners LP
Entity File Number	001-34664
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	43-1918951
Entity Central Index Key	0001136352
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		73,533,772
Entity Address, Address Line Two	Suite 3400
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	832
Local Phone Number	519-2200
Crestwood Midstream Partners LP
Document Information [Line Items]
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Registrant Name	Crestwood Midstream Partners LP
Entity File Number	001-35377
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-1647837
Entity Central Index Key	0001304464
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
Common Units
Document Information [Line Items]
Title of 12(b) Security	Common Units representing limited partnership interests
Trading Symbol	CEQP
Security Exchange Name	NYSE
Preferred Units
Document Information [Line Items]
Title of 12(b) Security	Preferred Units representing limited partnership interests
Trading Symbol	CEQP-P
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Assets
Cash	$ 14.5	$ 25.7
Accounts receivable, less allowance for doubtful accounts of $0.4 million and $0.3 million at September 30, 2020 and December 31, 2019	222.2	242.2
Inventory	100.1	53.7
Assets from price risk management activities	27.6	43.2
Assets held for sale	23.1	0
Prepaid expenses and other current assets	8.8	11.6
Total current assets	396.3	376.4
Property, plant and equipment	3,750.9	3,612.5
Less: accumulated depreciation	799.2	703.4
Property, plant and equipment, net	2,951.7	2,909.1
Intangible assets	1,126.1	1,076.3
Less: accumulated amortization	316.5	271.1
Intangible assets, net	809.6	805.2
Goodwill	138.6	218.9
Operating lease, right-of-use assets, net	39.6	53.8
Investments in unconsolidated affiliates	953	980.4
Other non-current assets	5.4	5.5
Total assets	5,294.2	5,349.3
Current liabilities:
Accounts payable	141.1	189.2
Accrued expenses and other liabilities	156.5	161.7
Liabilities from price risk management activities	39.4	6.7
Current portion of long-term debt	0.2	0.2
Total current liabilities	337.2	357.8
Long-term debt, less current portion	2,548.9	2,328.3
Other long-term liabilities	289.1	301.6
Deferred income taxes	2.2	2.6
Total liabilities	3,177.4	2,990.3
Commitments and contingencies (Note 11)
Interest of non-controlling partner in subsidiary	431.6	426.2
Partners’ capital:
Crestwood Equity Partners LP partners’ capital (73,973,777 and 72,282,942 common and subordinated units issued and outstanding at September 30, 2020 and December 31, 2019)	1,073.2	1,320.8
Preferred units (71,257,445 units issued and outstanding at both September 30, 2020 and December 31, 2019)	612	612
Total partners’ capital	1,685.2	1,932.8
Total liabilities and capital	$ 5,294.2	$ 5,349.3
Limited Partners' Capital Account, Units Issued	73,973,777	72,282,942
Limited Partners' Capital Account, Units Outstanding	73,973,777	72,282,942
Preferred Units, Issued	71,257,445	71,257,445
Preferred Units, Outstanding	71,257,445	71,257,445
Crestwood Midstream Partners LP
Assets
Cash	$ 13.7	$ 25.4
Accounts receivable, less allowance for doubtful accounts of $0.4 million and $0.3 million at September 30, 2020 and December 31, 2019	222.1	241.9
Inventory	100.1	53.7
Assets from price risk management activities	27.6	43.2
Assets held for sale	23.1	0
Prepaid expenses and other current assets	8.8	11.6
Total current assets	395.4	375.8
Property, plant and equipment	4,080.9	3,942.6
Less: accumulated depreciation	981.4	875.1
Property, plant and equipment, net	3,099.5	3,067.5
Intangible assets	1,126.1	1,076.3
Less: accumulated amortization	316.5	271.1
Intangible assets, net	809.6	805.2
Goodwill	138.6	218.9
Operating lease, right-of-use assets, net	39.6	53.8
Investments in unconsolidated affiliates	953	980.4
Other non-current assets	3.1	2.4
Total assets	5,438.8	5,504
Current liabilities:
Accounts payable	138.6	186.6
Accrued expenses and other liabilities	154.8	160.4
Liabilities from price risk management activities	39.4	6.7
Current portion of long-term debt	0.2	0.2
Total current liabilities	333	353.9
Long-term debt, less current portion	2,548.9	2,328.3
Other long-term liabilities	287.2	295.6
Deferred income taxes	0.6	0.7
Total liabilities	3,169.7	2,978.5
Interest of non-controlling partner in subsidiary	431.6	426.2
Partners’ capital:
Partners' capital	1,837.5	2,099.3
Total liabilities and capital	$ 5,438.8	$ 5,504

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Allowance for doubtful accounts	$ 0.4	$ 0.3
Limited Partners' Capital Account, Units Issued	73,973,777	72,282,942
Limited Partners' Capital Account, Units Outstanding	73,973,777	72,282,942
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	$ 0.4	$ 0.3

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Revenues	$ 519.2	$ 823.6	$ 1,599.8	$ 2,342.2
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 12)	6.1	3.8	12.9	39.1
Total costs of product/services sold	358.7	657.4	1,118.8	1,890.2
Operating expenses and other:
Operations and maintenance	31	36	100.2	99.3
General and administrative	19.6	24.9	64	84.4
Depreciation, amortization and accretion	60.8	51.5	177.9	140.6
Loss on long-lived assets, net	21.3	0.1	26.1	2.1
Goodwill impairment	0	0	80.3	0
Gain on acquisition	0	0	0	(209.4)
Total expenses	132.7	112.5	448.5	117
Operating income (loss)	27.8	53.7	32.5	335
Earnings from unconsolidated affiliates, net	10.5	10.4	24.4	21
Interest and debt expense, net	(33.7)	(30.6)	(100.3)	(83.3)
Other income, net	0	0.1	0.2	0.3
Income (loss) before income taxes	4.6	33.6	(43.2)	273
(Provision) benefit for income taxes	0	0	0.1	(0.3)
Net income (loss)	4.6	33.6	(43.1)	272.7
Net income attributable to non-controlling partner	10.3	9.9	30.4	24.5
Net income (loss) attributable to parent	(5.7)	23.7	(73.5)	248.2
Net income attributable to preferred unit holders	15	15	45	45
Net income (loss) attributable to partners	(20.7)	8.7	(118.5)	203.2
Subordinated unitholders’ interest in net income	0	0.1	0	1.2
Common unitholders’ interest in net income (loss)	$ (20.7)	$ 8.6	$ (118.5)	$ 202
Net income (loss) per limited partner unit:
Basic (in dollars per share)	$ (0.28)	$ 0.12	$ (1.62)	$ 2.81
Diluted (in dollars per share)	$ (0.28)	$ 0.12	$ (1.62)	$ 2.66
Weighted-average limited partners’ units outstanding:
Basic (units)	73.4	71.8	73.1	71.8
Dilutive units (units)	0	3.7	0	4.6
Diluted (units)	73.4	75.5	73.1	76.4
Crestwood Midstream Partners LP
Revenues:
Revenues	$ 519.2	$ 823.6	$ 1,599.8	$ 2,342.2
Related party (Note 12)	0.2	0	0.5	0
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 12)	6.1	3.8	12.9	39.1
Total costs of product/services sold	358.7	657.4	1,118.8	1,890.2
Operating expenses and other:
Operations and maintenance	31	36	100.2	99.3
General and administrative	18.5	23.7	60.4	80.6
Depreciation, amortization and accretion	64.2	55.1	188.4	151.2
Loss on long-lived assets, net	21.3	0.1	26.1	2.1
Goodwill impairment	0	0	80.3	0
Gain on acquisition	0	0	0	(209.4)
Total expenses	135	114.9	455.4	123.8
Operating income (loss)	25.5	51.3	25.6	328.2
Earnings from unconsolidated affiliates, net	10.5	10.4	24.4	21
Interest and debt expense, net	(33.7)	(30.6)	(100.3)	(83.3)
Income (loss) before income taxes	2.3	31.1	(50.3)	265.9
(Provision) benefit for income taxes	0	0.1	0.2	(0.2)
Net income (loss)	2.3	31.2	(50.1)	265.7
Net income attributable to non-controlling partner	10.3	9.9	30.4	24.5
Net income (loss) attributable to parent	(8)	21.3	(80.5)	241.2
Product
Revenues:
Revenues	417.2	710.7	1,282.1	2,037.9
Related party (Note 12)	10.7	0.3	25.4	2.8
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	348.2	646.8	1,090.2	1,829.8
Product | Crestwood Midstream Partners LP
Revenues:
Revenues	417.2	710.7	1,282.1	2,037.9
Related party (Note 12)	10.7	0.3	25.4	2.8
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	348.2	646.8	1,090.2	1,829.8
Service
Revenues:
Revenues	102	112.9	317.7	304.3
Related party (Note 12)	0.2	0	0.5	0
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	4.4	6.8	15.7	21.3
Service | Crestwood Midstream Partners LP
Revenues:
Revenues	102	112.9	317.7	304.3
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	4.4	6.8	15.7	21.3
Gathering and Processing Segment | Product
Revenues:
Revenues	54	155	187.2	370.8
Gathering and Processing Segment | Product | Crestwood Midstream Partners LP
Revenues:
Revenues	54	155	187.2	370.8
Gathering and Processing Segment | Service
Revenues:
Revenues	91.2	102.8	287.4	269
Gathering and Processing Segment | Service | Crestwood Midstream Partners LP
Revenues:
Revenues	91.2	102.8	287.4	269
Marketing Supply and Logistics
Revenues:
Revenues				1,685.6
Marketing Supply and Logistics | Product
Revenues:
Revenues	352.5	555.4	1,069.5	1,664.3
Marketing Supply and Logistics | Product | Crestwood Midstream Partners LP
Revenues:
Revenues	352.5	555.4	1,069.5	1,664.3
Marketing Supply and Logistics | Service
Revenues:
Revenues	7.1	6	19.7	18.5
Marketing Supply and Logistics | Service | Crestwood Midstream Partners LP
Revenues:
Revenues	7.1	6	19.7	18.5
Storage and Transportation | Service
Revenues:
Revenues	3.5	4.1	10.1	16.8
Storage and Transportation | Service | Crestwood Midstream Partners LP
Revenues:
Revenues	$ 3.5	$ 4.1	$ 10.1	$ 16.8

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 4.6	$ 33.6	$ (43.1)	$ 272.7
Change in fair value of Suburban Propane Partners, L.P. units	0.3	(0.1)	(0.8)	0.6
Comprehensive income (loss)	4.9	33.5	(43.9)	273.3
Comprehensive income attributable to non-controlling partner	10.3	9.9	30.4	24.5
Comprehensive income (loss) attributable to Crestwood Equity Partners LP	$ (5.4)	$ 23.6	$ (74.3)	$ 248.8

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
Partner units, beginning balance (in units) at Dec. 31, 2018											71,200,000	400,000
Preferred units, beginning balance (in units) at Dec. 31, 2018										71,300,000
Beginning balance at Dec. 31, 2018		$ 612	$ 1,240.5	$ 181.3	$ 2,033.8		$ 2,028.2	$ 181.3	$ 2,209.5
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15)	(43.1)	(3.3)	(61.4)		(57.8)	(3.3)	(61.1)
Unit-based compensation charges			17.3		17.3		17.3		17.3
Unit-based compensation charges (in shares)											900,000
Taxes paid for unit-based compensation vesting			(7)		(7)		(7)		(7)
Taxes paid for unit-based compensation vesting (in shares)											(200,000)
Change in fair value of Suburban Propane Partners, L.P. units			0.4		0.4
Other			(0.7)		(0.7)		(0.3)		(0.3)
Net income (loss)		15	(4.9)	4	14.1		7.6	4	11.6
Preferred units, ending balance (in units) at Mar. 31, 2019										71,300,000
Partner units, ending balance (in units) at Mar. 31, 2019											71,900,000	400,000
Ending Balance at Mar. 31, 2019		612	1,202.5	182	1,996.5		1,988	182	2,170
Partner units, beginning balance (in units) at Dec. 31, 2018											71,200,000	400,000
Preferred units, beginning balance (in units) at Dec. 31, 2018										71,300,000
Beginning balance at Dec. 31, 2018		612	1,240.5	181.3	2,033.8		2,028.2	181.3	2,209.5
Increase (Decrease) in Partners' Capital [Roll Forward]
Non-controlling interest reclassification (Note 10)	$ 178.8
Change in fair value of Suburban Propane Partners, L.P. units	0.6
Net income (loss)	272.7					$ 265.7
Preferred units, ending balance (in units) at Sep. 30, 2019										71,300,000
Partner units, ending balance (in units) at Sep. 30, 2019											71,800,000	400,000
Ending Balance at Sep. 30, 2019		612	1,340.6	0	1,952.6		2,118.8	0	2,118.8
Partner units, beginning balance (in units) at Mar. 31, 2019											71,900,000	400,000
Preferred units, beginning balance (in units) at Mar. 31, 2019										71,300,000
Beginning balance at Mar. 31, 2019		612	1,202.5	182	1,996.5		1,988	182	2,170
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15)	(43.1)	(3.3)	(61.4)		(59.7)	(3.3)	(63)
Unit-based compensation charges			11.3		11.3		11.3		11.3
Taxes paid for unit-based compensation vesting			(3.6)		(3.6)		(3.6)		(3.6)
Non-controlling interest reclassification (Note 10)				(178.8)	(178.8)			(178.8)	(178.8)
Taxes paid for unit-based compensation vesting (in shares)											(100,000)
Change in fair value of Suburban Propane Partners, L.P. units			0.3		0.3
Other			(0.4)	0.1	(0.3)		(0.1)	0.1	0
Net income (loss)		15	199.4	0	214.4		212.3		212.3
Preferred units, ending balance (in units) at Jun. 30, 2019										71,300,000
Partner units, ending balance (in units) at Jun. 30, 2019											71,800,000	400,000
Ending Balance at Jun. 30, 2019		612	1,366.4	0	1,978.4		2,148.2	0	2,148.2
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15)	(43.1)	0	(58.1)		(59.8)		(59.8)
Unit-based compensation charges			9.3		9.3		9.3		9.3
Taxes paid for unit-based compensation vesting			(0.3)		(0.3)		(0.3)		(0.3)
Taxes paid for unit-based compensation vesting (in shares)											0
Change in fair value of Suburban Propane Partners, L.P. units	(0.1)		(0.1)		(0.1)
Other			(0.3)	0	(0.3)		0.1		0.1
Net income (loss)	$ 33.6	15	8.7	0	23.7	31.2	21.3		21.3
Preferred units, ending balance (in units) at Sep. 30, 2019										71,300,000
Partner units, ending balance (in units) at Sep. 30, 2019											71,800,000	400,000
Ending Balance at Sep. 30, 2019		612	1,340.6	$ 0	1,952.6		$ 2,118.8	$ 0	2,118.8
Partner units, beginning balance (in units) at Dec. 31, 2019											71,900,000	400,000
Preferred units, beginning balance (in units) at Dec. 31, 2019	71,257,445									71,300,000
Beginning balance at Dec. 31, 2019		612	1,320.8		1,932.8	2,099.3			2,099.3
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15)	(45.3)		(60.3)				(57)
Unit-based compensation charges			0.2		0.2				(4.4)
Unit-based compensation charges (in shares)											1,700,000
Taxes paid for unit-based compensation vesting			(15.1)		(15.1)				(15.1)
Taxes paid for unit-based compensation vesting (in shares)											(500,000)
Change in fair value of Suburban Propane Partners, L.P. units			(1.1)		(1.1)
Other			3.5		3.5				(1.1)
Net income (loss)		15	(48.3)		(33.3)				(35.5)
Preferred units, ending balance (in units) at Mar. 31, 2020										71,300,000
Partner units, ending balance (in units) at Mar. 31, 2020											73,300,000	400,000
Ending Balance at Mar. 31, 2020		612	1,214.7		1,826.7				1,986.2
Partner units, beginning balance (in units) at Dec. 31, 2019											71,900,000	400,000
Preferred units, beginning balance (in units) at Dec. 31, 2019	71,257,445									71,300,000
Beginning balance at Dec. 31, 2019		612	1,320.8		1,932.8	2,099.3			2,099.3
Increase (Decrease) in Partners' Capital [Roll Forward]
Change in fair value of Suburban Propane Partners, L.P. units	$ (0.8)
Net income (loss)	$ (43.1)					(50.1)
Preferred units, ending balance (in units) at Sep. 30, 2020	71,257,445									71,300,000
Partner units, ending balance (in units) at Sep. 30, 2020											73,600,000	400,000
Ending Balance at Sep. 30, 2020		612	1,073.2		1,685.2	1,837.5			1,837.5
Increase (Decrease) in Partners' Capital [Roll Forward]
Other (in shares)											200,000
Partner units, beginning balance (in units) at Mar. 31, 2020											73,300,000	400,000
Preferred units, beginning balance (in units) at Mar. 31, 2020										71,300,000
Beginning balance at Mar. 31, 2020		612	1,214.7		1,826.7				1,986.2
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15)	(45.7)		(60.7)				(62)
Unit-based compensation charges			13.6		13.6				13.6
Unit-based compensation charges (in shares)											0
Taxes paid for unit-based compensation vesting			(0.4)		(0.4)				(0.4)
Taxes paid for unit-based compensation vesting (in shares)											(100,000)
Other			(0.1)		(0.1)				0.1
Net income (loss)		15	(49.5)		(34.5)				(37)
Preferred units, ending balance (in units) at Jun. 30, 2020										71,300,000
Partner units, ending balance (in units) at Jun. 30, 2020											73,200,000	400,000
Ending Balance at Jun. 30, 2020		612	1,132.6		1,744.6				1,900.5
Increase (Decrease) in Partners' Capital [Roll Forward]
Other (in shares)											0
Distributions to partners		(15)	(45.7)		(60.7)				(61.9)
Unit-based compensation charges			7.1		7.1				7.1
Unit-based compensation charges (in shares)											400,000
Taxes paid for unit-based compensation vesting			(0.1)		(0.1)				(0.1)
Taxes paid for unit-based compensation vesting (in shares)											0
Change in fair value of Suburban Propane Partners, L.P. units	$ 0.3		0.3		0.3
Other			(0.3)		(0.3)				(0.1)
Net income (loss)	$ 4.6	15	(20.7)		(5.7)	2.3			(8)
Preferred units, ending balance (in units) at Sep. 30, 2020	71,257,445									71,300,000
Partner units, ending balance (in units) at Sep. 30, 2020											73,600,000	400,000
Ending Balance at Sep. 30, 2020		$ 612	$ 1,073.2		$ 1,685.2	$ 1,837.5			$ 1,837.5
Increase (Decrease) in Partners' Capital [Roll Forward]
Other (in shares)											0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities
Net income (loss)	$ (43.1)	$ 272.7
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	177.9	140.6
Amortization of debt-related deferred costs	4.9	4.6
Unit-based compensation charges	17.3	41.6
Loss on long-lived assets, net	26.1	2.1
Gain on acquisition	0	(209.4)
Goodwill impairment	80.3	0
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	5.4	6.9
Deferred income taxes	(0.4)	0
Changes in operating assets and liabilities	26.9	19.2
Net cash provided by operating activities	295.3	278.3
Investing activities
Acquisitions, net of cash acquired (Note 3)	(162.3)	(462.1)
Purchases of property, plant and equipment	(158.8)	(347)
Investments in unconsolidated affiliates	(6)	(52.3)
Capital distributions from unconsolidated affiliates	27.8	27.3
Other	1.6	(0.4)
Net cash used in investing activities	(297.7)	(834.5)
Financing activities
Proceeds from the issuance of long-term debt	947	1,993.7
Payments on long-term debt	(731.1)	(1,475.2)
Payments on finance leases	(2.4)	(2.6)
Payments for debt-related deferred costs	0	(9)
Net proceeds from issuance of non-controlling interest	2.8	235
Distributions to partners	(136.7)	(129.3)
Distributions to non-controlling partner	(27.8)	(15.8)
Distributions to preferred unitholders	(45)	(45)
Taxes paid for unit-based compensation vesting	(15.6)	(10.9)
Other	0	(0.3)
Net cash provided by (used in) financing activities	(8.8)	540.6
Net change in cash	(11.2)	(15.6)
Cash at beginning of period	25.7	17.2
Cash at end of period	14.5	1.6
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	40	(22.9)
Crestwood Midstream Partners LP
Operating activities
Net income (loss)	(50.1)	265.7
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	188.4	151.2
Amortization of debt-related deferred costs	4.9	4.6
Unit-based compensation charges	17.3	41.6
Loss on long-lived assets, net	26.1	2.1
Gain on acquisition	0	(209.4)
Goodwill impairment	80.3	0
Earnings from unconsolidated affiliates, net, adjusted for cash distributions received	5.4	6.9
Deferred income taxes	(0.1)	0.1
Changes in operating assets and liabilities	21.8	18.2
Net cash provided by operating activities	294	281
Investing activities
Acquisitions, net of cash acquired (Note 3)	(162.3)	(462.1)
Purchases of property, plant and equipment	(158.8)	(347)
Investments in unconsolidated affiliates	(6)	(52.3)
Capital distributions from unconsolidated affiliates	27.8	27.3
Other	1.6	(0.4)
Net cash used in investing activities	(297.7)	(834.5)
Financing activities
Proceeds from the issuance of long-term debt	947	1,993.7
Payments on long-term debt	(731.1)	(1,475.2)
Payments on finance leases	(2.4)	(2.6)
Payments for debt-related deferred costs	0	(9)
Net proceeds from issuance of non-controlling interest	2.8	235
Distributions to partners	(180.9)	(177.3)
Distributions to non-controlling partner	(27.8)	(15.8)
Taxes paid for unit-based compensation vesting	(15.6)	(10.9)
Net cash provided by (used in) financing activities	(8)	537.9
Net change in cash	(11.7)	(15.6)
Cash at beginning of period	25.4	16.5
Cash at end of period	13.7	0.9
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	40	$ (22.9)
Non-Controlling Partners
Financing activities
Net proceeds from issuance of non-controlling interest	$ 2.8

Organization and Business Descr

Organization and Business Description	9 Months Ended
	Sep. 30, 2020
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 itself or Crestwood Midstream Partners LP and its consolidated subsidiaries. The accompanying consolidated financial statements and related notes should be read in conjunction with our 2019 Annual Report on Form 10-K filed with the Securities and Exchange Commission (SEC) on February 21, 2020. The financial information as of September 30, 2020, and for the three and nine months ended September 30, 2020 and 2019, is unaudited. The consolidated balance sheets as of December 31, 2019 were derived from the audited balance sheets filed in our 2019 Annual Report on Form 10-K. Business Description Crestwood Equity is a publicly-traded 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 the United States. 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.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation and 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. 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 There were no material changes in our significant accounting policies from those described in our 2019 Annual Report on Form 10-K. Below is an update of our accounting policies related to Goodwill and Accounts Receivable. Goodwill Our goodwill represents the excess of the amount we paid for a business over the fair value of the net identifiable assets acquired. We evaluate goodwill for impairment annually on December 31, and whenever events indicate that it is more likely than not that the fair value of a reporting unit could be less than its carrying amount. This evaluation requires us to compare the fair value of each of our reporting units to its carrying value (including goodwill). If the fair value exceeds the carrying amount, goodwill of the reporting unit is not considered impaired. We estimate the fair value of our reporting units based on a number of factors, including discount rates, projected cash flows and the potential value we would receive if we sold the reporting unit. Estimating projected cash flows requires us to make certain assumptions as it relates to the future operating performance of each of our reporting units (which includes assumptions, among others, about estimating future operating margins and related future growth in those margins, contracting efforts and the cost and timing of facility expansions) and assumptions related to our customers, such as their future capital and operating plans and their financial condition. When considering operating performance, various factors are considered such as current and changing economic conditions and the commodity price environment, among others. Due to the imprecise nature of these projections and assumptions, actual results can and often do, differ from our estimates. If the assumptions embodied in the projections prove inaccurate, we could incur a future impairment charge. In addition, the use of the income approach to determine the fair value of our reporting units (see further discussion of the use of the income approach below) could result in a different fair value if we had utilized a market approach, or a combination thereof. The following table summarizes the goodwill of our various reporting units (in millions) : Impairment during the December 31, 2019 September 30, 2020 September 30, 2020 Gathering and Processing Arrow $ 45.9 $ — $ 45.9 Powder River Basin 80.3 80.3 — Marketing, Supply and Logistics NGL Marketing and Logistics 92.7 — 92.7 Total $ 218.9 $ 80.3 $ 138.6 During the first quarter of 2020, current and forward commodity prices significantly declined from their levels at December 31, 2019 due primarily to the decreases in energy demand as a result of the outbreak of the COVID-19 pandemic and actions taken by the Organization of the Petroleum Exporting Countries, Russia, the United States and other oil-producing countries relating to the oversupply of oil. We currently anticipate that the decrease in commodity prices will have a negative impact on certain of our customers in our gathering and processing segment, which could adversely impact the financial performance of certain of the reporting units within those operations. Upon acquisition, we are required to record the assets, liabilities and goodwill of a reporting unit at its fair value on the date of acquisition. As a result, any level of decrease in the forecasted cash flows of these businesses or increases in the discount rates utilized to value those businesses from their respective acquisition dates would likely result in the fair value of the reporting unit falling below the carrying value of the reporting unit, and could result in an assessment of whether that reporting unit's goodwill is impaired. We acquired our Powder River Basin reporting unit in 2019 and recorded it at fair value at that time. Based on the events that occurred during the first quarter of 2020 described above, we determined that the forecasted cash flows, and therefore the fair value, of our Powder River Basin reporting unit significantly decreased during the first quarter of 2020, and accordingly performed a quantitative impairment assessment of the goodwill related to that reporting unit during that period. Based on our quantitative assessment, which utilized the income approach, we determined that the goodwill associated with the Powder River Basin reporting unit should be fully impaired during the first quarter of 2020, and accordingly recorded an $80.3 million impairment of the goodwill attributed to that reporting unit during the first quarter of 2020. We did not record any impairments of the goodwill associated with our Arrow or NGL Marketing and Logistics reporting units during the nine months ended September 30, 2020, as we do not have indicators that it is more likely than not that the fair value of those reporting units has declined to below their carrying value at September 30, 2020. Accounts Receivable Effective January 1, 2020, we adopted the provision of Accounting Standards Update 2016-13 Financial Instruments - Credit Losses (Topic 326) , which provides revised guidance on evaluating accounts and notes receivable and other financial instruments for impairment. We record accounts receivable when products or services are delivered and it is probable that payment will be received for those products or services, and we do not record any interest or penalties on accounts receivable that are past due under the terms of the related arrangement or invoice until those amounts are received. Topic 326 requires companies to evaluate their financial instruments for impairment by recording an allowance for doubtful accounts and/or bad debt expense based on certain categories of instruments rather than a specific identification approach. We adopted the provisions of this standard using a method to estimate the allowance for doubtful accounts that considered both the aging of our accounts receivable and the projected loss rate of our receivables. We write off accounts receivable, and the related allowance for doubtful accounts, when it becomes remote that payment for products or services will be received. On January 1, 2020, we recorded a $0.7 million increase to our allowance for doubtful accounts and a $0.7 million decrease to partners’ capital to reflect the cumulative effect of adopting the new standard. In addition, on January 1, 2020, Crestwood Permian Basin Holdings LLC (Crestwood Permian), our 50% equity investment, also adopted the provisions of Topic 326 and we recorded a decrease of approximately $0.2 million to our equity 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. The adoption of this standard was not material to our other equity investments.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestiture Acquisitions NGL Asset Acquisition In April 2020, we acquired several NGL storage and rail-to-truck liquid petroleum gas (LPG) terminals from Plains All American Pipeline, L.P. (Plains) for approximately $162 million. The acquired assets include 7 MMBbls of NGL storage and seven LPG terminals, and resulted in an increase of approximately $110 million to our property, plant and equipment, $50 million to our intangible assets and $2 million to our other assets and liabilities, net. We allocated the purchase price to these assets and liabilities based on their fair values, which are Level 3 fair value measurements and were developed by management with the assistance of a third-party valuation firm utilizing market-related information about the property, plant and equipment and customer relationships acquired. These assets are included in our marketing, supply and logistics segment. The transaction costs related to this acquisition were not material during the three and nine months ended September 30, 2020. Jackalope Acquisition On April 9, 2019, Crestwood Niobrara LLC (Crestwood Niobrara), our consolidated subsidiary, acquired Williams Partners LP’s (Williams) 50% equity interest in Jackalope Gas Gathering Services, L.L.C. (Jackalope) for approximately $484.6 million (Jackalope Acquisition). The acquisition was funded through a combination of borrowings under the CMLP credit facility and the issuance of $235 million of new preferred units to CN Jackalope Holdings LLC (Jackalope Holdings) (see Note 10 for a further discussion of the issuance of the new preferred units). Prior to the Jackalope Acquisition, Crestwood Niobrara owned a 50% equity interest in Jackalope, which we accounted for under the equity method of accounting. As a result of this transaction, Crestwood Niobrara controls and owns 100% of the equity interests in Jackalope. The financial results of Jackalope are included in our gathering and processing segment from the date of the acquisition. The fair value of the assets acquired and liabilities assumed in the Jackalope Acquisition exceeded the sum of the cash consideration paid and the historical book value of our 50% equity interest in Jackalope (which was remeasured at fair value and derecognized) and, as a result, we recognized a gain of approximately $209.4 million that is included in gain on acquisition in our consolidated statements of operations. Divestiture On October 1, 2020, we sold our gathering systems in the Fayetteville Shale to a third party for approximately $23 million. As a result of the sale, we classified these assets as current assets held for sale on our consolidated balance sheets at September 30, 2020 and recorded a loss on long-lived assets of approximately $19.9 million during three months ended September 30, 2020 for the difference between the assets held for sale and the historical carrying value of the property, plant and equipment and current assets and liabilities related to the assets sold. The current assets held for sale were recorded at fair value based on the sales proceeds, which is a Level 3 fair value measurement. For a further description of the Fayetteville gathering systems, which are included in our gathering and processing segment, see our 2019 Annual Report on Form 10-K.

Certain Balance Sheet Informati

Certain Balance Sheet Information	9 Months Ended
	Sep. 30, 2020
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, 2020 2019 2020 2019 Accrued expenses $ 36.6 $ 61.6 $ 34.9 $ 60.3 Accrued property taxes 8.0 6.1 8.0 6.1 Income tax payable 0.2 0.3 0.2 0.3 Interest payable 51.3 25.6 51.3 25.6 Accrued additions to property, plant and equipment 10.6 38.0 10.6 38.0 Contingent consideration 19.0 — 19.0 — Operating leases 16.5 18.1 16.5 18.1 Finance leases 3.0 3.2 3.0 3.2 Deferred revenue 11.3 8.8 11.3 8.8 Total accrued expenses and other liabilities $ 156.5 $ 161.7 $ 154.8 $ 160.4 Other Long-Term Liabilities Other long-term liabilities consisted of the following ( in millions ): CEQP CMLP September 30, December 31, September 30, December 31, 2020 2019 2020 2019 Contract liabilities $ 166.9 $ 144.7 $ 166.9 $ 144.7 Contingent consideration 38.0 57.0 38.0 57.0 Operating leases 29.6 41.5 29.6 41.5 Asset retirement obligations 33.7 33.3 33.7 33.3 Other 20.9 25.1 19.0 19.1 Total other long-term liabilities $ 289.1 $ 301.6 $ 287.2 $ 295.6

Investments in Unconsolidated A

Investments in Unconsolidated Affiliates	9 Months Ended
	Sep. 30, 2020
Equity Method Investments and Joint Ventures [Abstract]
Investments in Unconsolidated Affiliates	Investments in Unconsolidated Affiliates Variable Interest Entity 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 Earnings (Loss) from September 30, December 31, Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 2020 2019 Stagecoach Gas Services LLC (1) $ 798.2 $ 814.4 $ 9.9 $ 10.5 $ 28.3 $ 23.9 Crestwood Permian Basin Holdings LLC (2) 113.4 121.8 0.5 (0.5) 0.3 (7.2) Tres Palacios Holdings LLC (3) 37.7 35.9 0.1 0.5 0.2 0.8 Powder River Basin Industrial Complex, LLC (4) 3.7 8.3 — (0.1) (4.4) (0.2) Jackalope Gas Gathering Services, L.L.C. (5) — — — — — 3.7 Total $ 953.0 $ 980.4 $ 10.5 $ 10.4 $ 24.4 $ 21.0 (1) As of September 30, 2020, our equity in the underlying net assets of Stagecoach Gas Services LLC (Stagecoach Gas) exceeded our investment balance by approximately $51.3 million. This excess amount is entirely attributable to goodwill and, as such, is not subject to amortization. Our Stagecoach Gas investment is included in our storage and transportation segment. (2) As of September 30, 2020, our equity in the underlying net assets of Crestwood Permian exceeded our investment balance by $9.3 million, and this excess amount is not subject to amortization. Our Crestwood Permian investment is included in our gathering and processing segment. (3) As of September 30, 2020, our equity in the underlying net assets of Tres Palacios Holdings LLC (Tres Holdings) exceeded our investment balance by approximately $23.1 million. Our Tres Holdings investment is included in our storage and transportation segment. (4) As of September 30, 2020, our equity in the underlying net assets of Powder River Basin Industrial Complex, LLC (PRBIC) approximates our investment balance. During the first quarter of 2020, we recorded our share of a long-lived asset impairment recorded by our PRBIC equity investment, which eliminated our $5.5 million historical basis difference between our investment balance and the equity in the underlying net assets of PRBIC, and also resulted in a $4.5 million reduction in our earnings from unconsolidated affiliates during the nine months ended September 30, 2020. Our PRBIC investment is included in our storage and transportation segment. (5) On April 9, 2019, Crestwood Niobrara acquired Williams 50% equity interest in Jackalope, and as a result, Crestwood Niobrara controls and owns 100% of the equity interests in Jackalope. As a result of this transaction, we eliminated our historical equity investment in Jackalope and began consolidating Jackalope’s operations. Our Jackalope investment was included in our gathering and processing segment. 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, 2020 2019 Operating Revenues Operating Expenses Net Income (Loss) Operating Revenues Operating Expenses Net Income (Loss) Stagecoach Gas $ 115.3 $ 58.9 $ 56.5 $ 120.8 $ 61.1 $ 60.0 Other (1) 91.2 113.0 (21.0) 84.3 92.1 (8.9) Total $ 206.5 $ 171.9 $ 35.5 $ 205.1 $ 153.2 $ 51.1 (1) Includes our Crestwood Permian, Tres Holdings and PRBIC equity investments during the nine months ended September 30, 2020 and 2019, and our Jackalope equity investment during the nine months ended September 30, 2019 (prior to the acquisition of the remaining 50% equity interest from Williams in April 2019). 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 Tres Holdings equity investment of $0.9 million during both the nine months ended September 30, 2020 and 2019. We recorded amortization of the excess basis in our PRBIC and Jackalope equity investments of $0.3 million and less than $0.1 million, respectively, during the nine months ended September 30, 2019. Distributions and Contributions The following table summarizes our distributions from and contributions to our unconsolidated affiliates (in millions) : Distributions (1) Contributions Nine Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Stagecoach Gas $ 44.5 $ 37.2 $ — $ — Crestwood Permian 8.5 2.9 — 21.4 Tres Holdings 4.4 3.5 6.0 6.3 PRBIC 0.2 — — 0.2 Jackalope — 11.6 — 24.4 Total $ 57.6 $ 55.2 $ 6.0 $ 52.3 (1) In October 2020, we received cash distributions from Stagecoach Gas, Crestwood Permian and Tres Holdings of approximately $15.3 million, $3.4 million and $2.0 million, respectively. 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 third-party expansion projects, and those third-party projects experienced regulatory and other delays that caused Stagecoach Gas to delay its growth capital projects. As a result, our consolidated balance sheet at September 30, 2020 reflects a $19 million current liability included in accrued expenses and other liabilities and a $38 million other long-term liability related to the anticipated settlement of this obligation.

Risk Management

Risk Management	9 Months Ended
	Sep. 30, 2020
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 (such as propane, ethane, butane and heating oil), crude oil and natural gas to energy-related businesses and may use a variety of financial and other instruments including forward contracts involving physical delivery of NGLs, crude oil and natural gas. 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 our 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 operating revenues and costs of product/services sold during the three and nine months ended September 30, 2020 and 2019 ( in millions ): Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Product revenues $ 32.4 $ 39.1 $ 125.4 $ 183.4 Gain (loss) reflected in costs of product/services sold $ (1.8) $ 14.9 $ 27.0 $ 21.9 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, 2020 December 31, 2019 Fixed Price Fixed Price Fixed Price Fixed Price Propane, ethane, butane, heating oil and crude oil (MMBbls) 73.5 78.8 33.5 36.6 Natural gas (Bcf) 18.8 26.1 3.7 8.7 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, 83% 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. For example, in June 2020, Chesapeake Energy Corporation (Chesapeake), our major customer in the Powder River Basin, filed for protection under Chapter 11 of the U.S. Bankruptcy Code. Chesapeake was current on all amounts due to us as of September 30, 2020 and we obtained letters of credit from Chesapeake to provide additional cash flow protection related to their credit risk. 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. 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. 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. The following table presents the fair value of our commodity derivative instruments with credit-risk related contingent features and their associated collateral ( in millions ): September 30, 2020 December 31, 2019 Aggregate fair value liability of derivative instruments with credit-risk-related contingent features (1) $ 21.0 $ 1.6 NYMEX-related net derivative asset (liability) position $ 16.1 $ (28.8) NYMEX-related cash collateral posted $ 1.5 $ 40.4 Cash collateral received, net $ 17.9 $ 16.9

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2020
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, 2020 and December 31, 2019, 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 Crestwood Midstream credit facility approximates the carrying amounts as of September 30, 2020 and December 31, 2019, 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 represents the carrying amount (reduced for deferred financing costs associated with the respective notes) and fair value of our senior notes ( in millions ): September 30, 2020 December 31, 2019 Carrying Fair Carrying Fair 2023 Senior Notes $ 689.5 $ 677.9 $ 695.1 $ 714.0 2025 Senior Notes $ 495.2 $ 458.2 $ 494.4 $ 514.4 2027 Senior Notes $ 592.9 $ 536.3 $ 592.1 $ 610.1 Financial Assets and Liabilities As of September 30, 2020 and December 31, 2019, 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, NGLs and natural gas. 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, 2020 and December 31, 2019 ( in millions ): September 30, 2020 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 $ 15.0 $ 188.0 $ — $ 203.0 $ (170.4) $ (5.0) $ 27.6 Suburban Propane Partners, L.P. units (2) 2.3 — — 2.3 — — 2.3 Total assets at fair value $ 17.3 $ 188.0 $ — $ 205.3 $ (170.4) $ (5.0) $ 29.9 Liabilities Liabilities from price risk management $ 17.9 $ 180.5 $ — $ 198.4 $ (170.4) $ 11.4 $ 39.4 Total liabilities at fair value $ 17.9 $ 180.5 $ — $ 198.4 $ (170.4) $ 11.4 $ 39.4 December 31, 2019 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 $ 3.7 $ 164.0 $ — $ 167.7 $ (122.3) $ (2.2) $ 43.2 Suburban Propane Partners, L.P. units (2) 3.1 — — 3.1 — — 3.1 Total assets at fair value $ 6.8 $ 164.0 $ — $ 170.8 $ (122.3) $ (2.2) $ 46.3 Liabilities Liabilities from price risk management $ 2.8 $ 151.9 $ — $ 154.7 $ (122.3) $ (25.7) $ 6.7 Total liabilities at fair value $ 2.8 $ 151.9 $ — $ 154.7 $ (122.3) $ (25.7) $ 6.7 (1) Amounts represent the impact of legally enforceable master netting agreements that allow us to settle positive and negative positions. (2) Amount is reflected in other assets on CEQP’s consolidated balance sheets.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt consisted of the following at September 30, 2020 and December 31, 2019 ( in millions ): September 30, December 31, Credit Facility $ 779.8 $ 557.0 2023 Senior Notes 693.2 700.0 2025 Senior Notes 500.0 500.0 2027 Senior Notes 600.0 600.0 Other 0.4 0.6 Less: deferred financing costs, net 24.3 29.1 Total debt 2,549.1 2,328.5 Less: current portion 0.2 0.2 Total long-term debt, less current portion $ 2,548.9 $ 2,328.3 Credit Facility At September 30, 2020, Crestwood Midstream had $446.3 million of available capacity under its credit facility considering the most restrictive debt covenants in its credit agreement. At September 30, 2020 and December 31, 2019, Crestwood Midstream’s outstanding standby letters of credit were $23.9 million and $31.7 million. Borrowings under the credit facility accrue interest at prime or Eurodollar based rates plus applicable spreads, which resulted in interest rates between 2.40% and 4.50% at September 30, 2020 and 3.96% and 6.00% at December 31, 2019. The weighted-average interest rate on outstanding borrowings as of September 30, 2020 and December 31, 2019 was 2.43% and 4.00%. 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, 2020, the net debt to consolidated EBITDA ratio was approximately 4.13 to 1.0, the consolidated EBITDA to consolidated interest expense ratio was approximately 4.65 to 1.0, and the senior secured leverage ratio was 1.25 to 1.0. Senior Notes In September 2020, Crestwood Midstream paid approximately $6.7 million to repurchase and cancel approximately $6.8 million of its 2023 Senior Notes.

Earnings Per Limited Partner Un

Earnings Per Limited Partner Unit	9 Months Ended
	Sep. 30, 2020
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 units excluded during the three and nine months ended September 30, 2020 and 2019 (in millions) : Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Preferred units (1) 7.1 7.1 7.1 7.1 Crestwood Niobrara’s preferred units (1) 8.7 — 8.7 — Unit-based compensation performance units (1) 0.2 — 0.3 — Subordinated units (1) 0.4 — 0.4 — (1) For additional information regarding the potential conversion/redemption of our preferred units and Crestwood Niobrara’s preferred units to CEQP common units, and of our performance units and subordinated units, see our 2019 Annual Report on Form 10-K. The table below shows CEQP’s net income (loss) per limited partner unit based on the number of basic and diluted limited partner units outstanding for the three and nine months ended September 30, 2020 and 2019 (in millions, except per unit amounts) : Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Common unitholders’ interest in net income (loss) $ (20.7) $ 8.6 $ (118.5) $ 202.0 Dilutive effect of net income attributable to subordinated units — 0.1 — 1.2 Diluted net income (loss) $ (20.7) $ 8.7 $ (118.5) $ 203.2 Weighted-average limited partners’ units outstanding - basic 73.4 71.8 73.1 71.8 Dilutive effect of Crestwood Niobrara preferred units — 3.0 — 3.9 Dilutive effect of stock-based compensation performance units — 0.3 — 0.3 Dilutive effect of subordinated units — 0.4 — 0.4 Weighted-average limited partners’ units outstanding - diluted 73.4 75.5 73.1 76.4 Basic earnings per unit: Net income (loss) per limited partner unit $ (0.28) $ 0.12 $ (1.62) $ 2.81 Diluted earnings per unit: Net income (loss) per limited partner unit $ (0.28) $ 0.12 $ (1.62) $ 2.66

Partners' Capital

Partners' Capital	9 Months Ended
	Sep. 30, 2020
Statement of Partners' Capital [Abstract]
Partners' Capital	Partners’ Capital Common Units Effective April 1, 2020, we suspended the equity distribution program with certain financial institutions under which we were allowed to offer and sell, from time to time through one or more of these financial institutions, common units having an aggregate offering price of up to $250 million. We did not issue any common units under this program during the nine months ended September 30, 2020 and 2019. Distributions Crestwood Equity Limited Partners. A summary of CEQP’s limited partner quarterly cash distributions for the nine months ended September 30, 2020 and 2019 is presented below: Record Date Payment Date Per Unit Rate Cash Distributions ( in millions ) 2020 February 7, 2020 February 14, 2020 $ 0.625 $ 45.3 May 8, 2020 May 15, 2020 0.625 45.7 August 7, 2020 August 14, 2020 0.625 45.7 $ 136.7 2019 February 7, 2019 February 14, 2019 $ 0.60 $ 43.1 May 8, 2019 May 15, 2019 0.60 43.1 August 7, 2019 August 14, 2019 0.60 43.1 $ 129.3 On October 15, 2020, we declared a distribution of $0.625 per limited partner unit to be paid on November 13, 2020 to unitholders of record on November 6, 2020 with respect to the quarter ended September 30, 2020. Preferred Unitholders . During the nine months ended September 30, 2020 and 2019, we made cash distributions to our preferred unitholders of approximately $45.0 million in both periods. On October 15, 2020, 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, 2020. Crestwood Midstream During the nine months ended September 30, 2020 and 2019, Crestwood Midstream paid cash distributions of $180.9 million and $177.3 million to Crestwood Equity. Non-Controlling Partner Crestwood Niobrara issued preferred interests to Jackalope Holdings, which are reflected as non-controlling interest in subsidiary apart from partners’ capital (i.e., temporary equity) on our consolidated balance sheets. In April 2019, Crestwood Niobrara issued $235 million in new preferred interests (Series A-3 Preferred Units) to Jackalope Holdings in conjunction with Crestwood Niobrara’s acquisition of the remaining 50% equity interest in Jackalope from Williams, at which time we began classifying our non-controlling interest in subsidiary apart from partners’ capital. We adjust the carrying amount of our non-controlling interest to its redemption value each period through net income attributable to non-controlling partner. The following table shows the change in our non-controlling interest in subsidiary at September 30, 2020 and 2019 (in millions) : Balance at December 31, 2019 $ 426.2 Contributions from non-controlling partner 2.8 Distributions to non-controlling partner (27.8) Net income attributable to non-controlling partner 30.4 Balance at September 30, 2020 $ 431.6 Balance at December 31, 2018 $ — Reclassification of Series A-2 Preferred Units 178.8 Issuance of Series A-3 Preferred Units 235.0 Distributions to non-controlling partner (9.2) Net income attributable to non-controlling partner 20.5 Balance at September 30, 2019 $ 425.1 Crestwood Niobrara makes quarterly cash distributions on its preferred interests within 30 days after the end of each quarter. During the nine months ended September 30, 2020 and 2019, Crestwood Niobrara paid cash distributions of $27.8 million and $15.8 million to Jackalope Holdings. In October 2020, Crestwood Niobrara paid cash distributions to Jackalope Holdings of approximately $9.3 million for the quarter ended September 30, 2020. During the nine months ended September 30, 2020, we received contributions of $2.8 million from our non-controlling partner to fund our Jackalope expansion projects. Other In February 2020, Crestwood Equity issued 184,528 performance units under the Crestwood Equity Partners LP Long Term Incentive Plan (Crestwood LTIP). The performance units are designed to provide an incentive for continuous employment to certain key employees. The vesting of performance units is subject to the attainment of certain performance and market goals over a three-year period, and entitle a participant to receive common units of Crestwood Equity without payment of an exercise price upon vesting. As of September 30, 2020, we had total unamortized compensation expense of approximately $3.1 million related to these performance units, which we expect will be amortized during the next three years. During the three and nine months ended September 30, 2020, we recognized compensation expense of approximately $0.3 million and $1.1 million related to these performance units, which is included in general and administrative expenses on our consolidated statements of operations.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings Linde Lawsuit . On December 23, 2019, Linde Engineering North America Inc. (Linde) filed a lawsuit in the District Court of Harris County, Texas alleging that Arrow Field Services, LLC, our consolidated subsidiary, and Crestwood Midstream breached a contract entered into in March 2018 under which Linde was to provide engineering, procurement and construction services to us related to the completion of the construction of the Bear Den II cryogenic processing plant. Linde claims damages of $55 million in unpaid invoices and other damages. This matter is not an insurable event based on our insurance policies, and we are unable to predict the outcome for this matter. 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, 2020 and December 31, 2019, we had approximately $10.5 million and $10.7 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 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. Our discussions regarding the notice of violation continue with the Three Affiliated Tribes. During September 2019, we experienced two produced water releases totaling approximately 5,000 barrels on our Arrow system located on the Fort Berthold Indian Reservation in North Dakota. We immediately notified the National Response Center, the State of North Dakota, the Three Affiliated Tribes, affected landowners and numerous other regulatory authorities. We are substantially complete with the remediation efforts and continue to monitor the impact of both spills. In response to the water releases on our Arrow system, we removed approximately 30 miles of water gathering pipeline from service. In addition, we are currently in the process of replacing certain sections of our water gathering pipeline with pipeline composed of higher capacity material that is more suitable to the environment and climate conditions in the Bakken, which will increase water gathering capacity on the Arrow system and further our commitment to sustainability and environmental stewardship in the areas where we live and operate. 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, 2020. At September 30, 2020 and December 31, 2019, our accrual of approximately $3.6 million and $6.7 million was based on our undiscounted estimate of amounts we will spend on compliance with environmental and other regulations, and any associated fines or penalties. We estimate that our potential liability for reasonably possible outcomes related to our environmental exposures could range from approximately $3.6 million to $4.8 million at September 30, 2020. 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. Losses are accrued based upon management’s estimates of the aggregate liability for claims incurred using certain assumptions followed in the insurance industry and based on past experience. The primary assumption utilized is actuarially determined loss development factors. The loss development factors are based primarily on historical data. Our self insurance reserves could be affected if future claim developments differ from the historical trends. We believe changes in health care costs, trends in health care claims of our employee base, accident frequency and severity and other factors could materially affect the estimate for these liabilities. We continually monitor changes in employee demographics, incident and claim type and evaluate our insurance accruals and adjust our accruals based on our evaluation of these qualitative data points. We are liable for the development of claims for our disposed retail propane operations, provided they were reported prior to August 1, 2012. The following table summarizes CEQP’s and CMLP’s self-insurance reserves at September 30, 2020 and December 31, 2019 ( in millions ): CEQP CMLP September 30, 2020 December 31, 2019 September 30, 2020 December 31, 2019 Self-insurance reserves (1) $ 9.4 $ 9.7 $ 8.4 $ 8.3 (1) At September 30, 2020, CEQP and CMLP classified approximately $6.2 million and $5.2 million, respectively of these reserves as other long-term liabilities on their consolidated balance sheets. Leases The following table summarizes the balance sheet information related to our operating and finance leases at September 30, 2020 and December 31, 2019 (in millions ): September 30, December 31, 2020 2019 Operating Leases Operating lease right-of-use assets, net $ 39.6 $ 53.8 Accrued expenses and other liabilities $ 16.5 $ 18.1 Long-term operating lease liabilities 29.6 41.5 Total operating lease liabilities $ 46.1 $ 59.6 Finance Leases Property, plant and equipment $ 13.5 $ 14.9 Less: accumulated depreciation 7.2 5.4 Property, plant and equipment, net $ 6.3 $ 9.5 Accrued expenses and other liabilities $ 3.0 $ 3.2 Other long-term liabilities 2.7 5.2 Total finance lease liabilities $ 5.7 $ 8.4 Lease expense. Our operating lease expense, net totaled $5.8 million and $6.2 million for the three months ended September 30, 2020 and 2019 and $20.4 million and $20.8 million for the nine months ended September 30, 2020 and 2019. Our finance lease expense totaled $0.9 million and $1.0 million for the three months ended September 30, 2020 and 2019 and $3.1 million and $3.2 million for the nine months ended September 30, 2020 and 2019. 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. 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, 2020 and December 31, 2019, we have no amounts accrued for these guarantees.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Crestwood Holdings LLC (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, product purchases, marketing services and various operating agreements. We also enter into transactions with our affiliates related to services provided on our expansion projects. During the nine months ended September 30, 2020 and 2019, we paid approximately $3.2 million and $6.8 million of capital expenditures to Applied Consultants, Inc., an affiliate of Crestwood Holdings. The following table shows transactions with our affiliates which are reflected in our consolidated statements of operations ( in millions ). For a further description of our related party agreements, see our 2019 Annual Report on Form 10-K. Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Revenues at CEQP and CMLP (1) $ 10.9 $ 0.3 $ 25.9 $ 2.8 Costs of product/services sold at CEQP and CMLP (2) $ 6.1 $ 3.8 $ 12.9 $ 39.1 Operations and maintenance expenses charged by CEQP and CMLP (3) $ 5.0 $ 6.3 $ 16.7 $ 19.7 General and administrative expenses charged by CEQP to CMLP, net (4) $ 7.4 $ 7.9 $ 25.4 $ 29.0 General and administrative expenses at CEQP charged to (from) Crestwood Holdings, net (5) $ 1.2 $ 0.3 $ 12.5 $ (5.0) (1) Includes $10.9 million and $25.9 million during the three and nine months ended September 30, 2020 primarily related to the sale of NGLs to a subsidiary of Crestwood Permian and $0.3 million and $1.6 million during the three and nine months ended September 30, 2019 related to the sale of NGLs to a subsidiary of Crestwood Permian and $1.2 million during the nine months ended September 30, 2019 related to the sale of natural gas to a subsidiary of Stagecoach Gas. (2) Includes (i) $5.7 million and $12.1 million during the three and nine months ended September 30, 2020 and $3.6 million and $12.7 million during the three and nine months ended September 30, 2019 related to purchases of NGLs from a subsidiary of Crestwood Permian; (ii) $0.3 million and $0.4 million during the three and nine months ended September 30, 2020 related to storage services provided by a subsidiary of Tres Holdings, (iii) $0.1 million and $0.4 million during the three and nine months ended September 30, 2020 and less than $0.1 million and $23.9 million during the three and nine months ended September 30, 2019 related to an agency marketing agreement with Ascent Resources - Utica, LLC, an affiliate of Crestwood Holdings; (iv) less than $0.1 million and $2.3 million during the three and nine months ended September 30, 2019 related to purchases of natural gas from a subsidiary of Stagecoach Gas; and (v) $0.2 million during both the three and nine months ended September 30, 2019 related to purchases of NGLs from Blue Racer Midstream, LLC, an affiliate of Crestwood Holdings. (3) 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 operations. During the three and nine months ended September 30, 2020, we charged $1.7 million and $5.0 million to Stagecoach Gas, $0.9 million and $3.1 million to Tres Holdings, and $2.4 million and $8.6 million to Crestwood Permian under these agreements. During the three and nine months ended September 30, 2019, we charged $1.8 million and $5.7 million to Stagecoach Gas, $1.1 million and $3.3 million to Tres Holdings, and $3.4 million and $10.2 million to Crestwood Permian. During the nine months ended September 30, 2019, we charged $0.5 million to Jackalope under an operating agreement prior to our acquisition of the remaining 50% equity interest in Jackalope in Williams. (4) Includes $8.4 million and $28.5 million of unit-based compensation charges allocated from CEQP to CMLP for the three and nine months ended September 30, 2020 and $8.9 million and $31.8 million for the three and nine months ended September 30, 2019. In addition, includes $1.0 million and $3.1 million of CMLP’s general and administrative costs allocated to CEQP during the three and nine months ended September 30, 2020 and $1.0 million and $2.8 million during the three and nine months ended September 30, 2019. (5) Includes a $0.3 million and $11.2 million reduction of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three and nine months ended September 30, 2020 and $0.4 million and $6.1 million of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three and nine months ended September 30, 2019. In addition, includes $0.9 million and $1.3 million of CEQP’s general and administrative costs allocated to Crestwood Holdings during the three and nine months ended September 30, 2020 and $0.7 million and $1.1 million during the three and nine months ended September 30, 2019. The following table shows accounts receivable and accounts payable with our affiliates ( in millions ): September 30, December 31, Accounts receivable at CEQP and CMLP $ 20.1 $ 7.3 Accounts payable at CEQP $ 13.8 $ 15.6 Accounts payable at CMLP $ 11.3 $ 13.1

Segments

Segments	9 Months Ended
	Sep. 30, 2020
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 interest and debt expense, net 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, 2020 2019 2020 2019 Net income (loss) $ 4.6 $ 33.6 $ (43.1) $ 272.7 Add: Interest and debt expense, net 33.7 30.6 100.3 83.3 Provision (benefit) for income taxes — — (0.1) 0.3 Depreciation, amortization and accretion 60.8 51.5 177.9 140.6 EBITDA $ 99.1 $ 115.7 $ 235.0 $ 496.9 Below is a reconciliation of CMLP’s net income (loss) to EBITDA ( in millions ): Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Net income (loss) $ 2.3 $ 31.2 $ (50.1) $ 265.7 Add: Interest and debt expense, net 33.7 30.6 100.3 83.3 Provision (benefit) for income taxes — (0.1) (0.2) 0.2 Depreciation, amortization and accretion 64.2 55.1 188.4 151.2 EBITDA $ 100.2 $ 116.8 $ 238.4 $ 500.4 The following tables summarize CEQP’s and CMLP’s reportable segment data for the three and nine months ended September 30, 2020 and 2019 ( 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 our 2019 Annual Report on Form 10-K. Included in earnings from unconsolidated affiliates, net below was approximately $9.9 million and $9.7 million of our proportionate share of interest expense, depreciation and amortization expense and gains (losses) on long-lived assets, net recorded by our equity investments for the three months ended September 30, 2020 and 2019 and $33.2 million and $32.7 million for the nine months ended September 30, 2020 and 2019. Crestwood Equity Three Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 145.2 $ 3.5 $ 370.5 $ — $ 519.2 Intersegment revenues 44.9 1.9 (46.8) — — Costs of product/services sold 63.2 — 295.5 — 358.7 Operations and maintenance expense 19.4 0.7 10.9 — 31.0 General and administrative expense — — — 19.6 19.6 Gain (loss) on long-lived assets, net (19.1) — (2.4) 0.2 (21.3) Earnings from unconsolidated affiliates, net 0.5 10.0 — — 10.5 EBITDA $ 88.9 $ 14.7 $ 14.9 $ (19.4) $ 99.1 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 3,544.2 $ 955.1 $ 766.9 $ 28.0 $ 5,294.2 Three Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 257.8 $ 4.1 $ 561.7 $ — $ 823.6 Intersegment revenues 33.6 3.5 (37.1) — — Costs of product/services sold 164.1 0.1 493.2 — 657.4 Operations and maintenance expense 27.5 1.1 7.4 — 36.0 General and administrative expense — — — 24.9 24.9 Loss on long-lived assets, net (0.1) — — — (0.1) Earnings (loss) from unconsolidated affiliates, net (0.5) 10.9 — — 10.4 Other income, net — — — 0.1 0.1 EBITDA $ 99.2 $ 17.3 $ 24.0 $ (24.8) $ 115.7 Nine Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 474.6 $ 10.1 $ 1,115.1 $ — $ 1,599.8 Intersegment revenues 99.2 6.9 (106.1) — — Costs of product/services sold 192.8 0.3 925.7 — 1,118.8 Operations and maintenance expense 65.7 2.8 31.7 — 100.2 General and administrative expense — — — 64.0 64.0 Gain (loss) on long-lived assets, net (23.7) — (2.6) 0.2 (26.1) Goodwill impairment (80.3) — — — (80.3) Earnings from unconsolidated affiliates, net 0.3 24.1 — — 24.4 Other income, net — — — 0.2 0.2 EBITDA $ 211.6 $ 38.0 $ 49.0 $ (63.6) $ 235.0 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 3,544.2 $ 955.1 $ 766.9 $ 28.0 $ 5,294.2 Nine Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 639.8 $ 16.8 $ 1,685.6 $ — $ 2,342.2 Intersegment revenues 111.8 10.3 (122.1) — — Costs of product/services sold 411.0 0.1 1,479.1 — 1,890.2 Operations and maintenance expense 70.2 3.0 26.1 — 99.3 General and administrative expense — — — 84.4 84.4 Gain (loss) on long-lived assets, net (2.1) — (0.2) 0.2 (2.1) Gain on acquisition 209.4 — — — 209.4 Earnings (loss) from unconsolidated affiliates, net (3.5) 24.5 — — 21.0 Other income, net — — — 0.3 0.3 EBITDA $ 474.2 $ 48.5 $ 58.1 $ (83.9) $ 496.9 Crestwood Midstream Three Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 145.2 $ 3.5 $ 370.5 $ — $ 519.2 Intersegment revenues 44.9 1.9 (46.8) — — Costs of product/services sold 63.2 — 295.5 — 358.7 Operations and maintenance expense 19.4 0.7 10.9 — 31.0 General and administrative expense — — — 18.5 18.5 Gain (loss) on long-lived assets, net (19.1) — (2.4) 0.2 (21.3) Earnings from unconsolidated affiliates, net 0.5 10.0 — — 10.5 EBITDA $ 88.9 $ 14.7 $ 14.9 $ (18.3) $ 100.2 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 3,692.9 $ 955.1 $ 766.9 $ 23.9 $ 5,438.8 Three Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 257.8 $ 4.1 $ 561.7 $ — $ 823.6 Intersegment revenues 33.6 3.5 (37.1) — — Costs of product/services sold 164.1 0.1 493.2 — 657.4 Operations and maintenance expense 27.5 1.1 7.4 — 36.0 General and administrative expense — — — 23.7 23.7 Loss on long-lived assets, net (0.1) — — — (0.1) Earnings (loss) from unconsolidated affiliates, net (0.5) 10.9 — — 10.4 EBITDA $ 99.2 $ 17.3 $ 24.0 $ (23.7) $ 116.8 Nine Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 474.6 $ 10.1 $ 1,115.1 $ — $ 1,599.8 Intersegment revenues 99.2 6.9 (106.1) — — Costs of product/services sold 192.8 0.3 925.7 — 1,118.8 Operations and maintenance expense 65.7 2.8 31.7 — 100.2 General and administrative expense — — — 60.4 60.4 Gain (loss) on long-lived assets, net (23.7) — (2.6) 0.2 (26.1) Goodwill impairment (80.3) — — — (80.3) Earnings from unconsolidated affiliates, net 0.3 24.1 — — 24.4 EBITDA $ 211.6 $ 38.0 $ 49.0 $ (60.2) $ 238.4 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 3,692.9 $ 955.1 $ 766.9 $ 23.9 $ 5,438.8 Nine Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 639.8 $ 16.8 $ 1,685.6 $ — $ 2,342.2 Intersegment revenues 111.8 10.3 (122.1) — — Costs of product/services sold 411.0 0.1 1,479.1 — 1,890.2 Operations and maintenance expense 70.2 3.0 26.1 — 99.3 General and administrative expense — — — 80.6 80.6 Gain (loss) on long-lived assets, net (2.1) — (0.2) 0.2 (2.1) Gain on acquisition 209.4 — — — 209.4 Earnings (loss) from unconsolidated affiliates, net (3.5) 24.5 — — 21.0 EBITDA $ 474.2 $ 48.5 $ 58.1 $ (80.4) $ 500.4

Revenues

Revenues	9 Months Ended
	Sep. 30, 2020
Revenue Recognition [Abstract]
Revenues	Revenues Contract Assets and Contract Liabilities 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 revenue contracts totaled $194.4 million and $225.0 million at September 30, 2020 and December 31, 2019, and are included in accounts receivable on our consolidated balance sheets. Our contract assets are included in other non-current assets on our consolidated balance sheets. Our contract liabilities primarily consist of current and non-current deferred revenues. On our consolidated balance sheets, our current deferred revenues are included in accrued expenses and other liabilities and our non-current deferred revenues are included in other long-term liabilities. The majority of revenues associated with our deferred revenues is expected to be recognized as the performance obligations under the related contracts are satisfied over the next 16 years. The following table summarizes our contract assets and contract liabilities (in millions) : September 30, 2020 December 31, 2019 Contract assets (non-current) $ 1.2 $ 1.2 Contract liabilities (current) (1) $ 11.3 $ 8.8 Contract liabilities (non-current) (1) $ 166.9 $ 144.7 (1) During the three and nine months ended September 30, 2020, we recognized revenues of approximately $3.3 million and $10.2 million that were previously included in contract liabilities at December 31, 2019. The remaining change in contract liabilities during the three and nine months ended September 30, 2020, related to capital reimbursements associated with our revenue contracts and revenue deferrals associated with our contracts with increasing (decreasing) rates. 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, 2020 (in millions) : Remainder of 2020 $ 25.7 2021 94.1 2022 59.6 2023 8.0 2024 3.3 Total $ 190.7 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. Disaggregation of Revenues The following tables summarize 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, 2020 and 2019 ( in millions ). We believe this summary best depicts how the nature, amount, timing and uncertainty of our revenues and cash flows are affected by economic factors. Three Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Topic 606 revenues Gathering Natural gas $ 30.3 $ — $ — $ — $ 30.3 Crude oil 22.5 — — — 22.5 Water 25.1 — — — 25.1 Processing Natural gas 6.1 — — — 6.1 Compression Natural gas 6.0 — — — 6.0 Storage Crude oil 0.1 0.8 — (0.3) 0.6 NGLs — — 3.4 — 3.4 Pipeline Crude oil — 1.7 — (0.6) 1.1 Transportation Crude oil 1.2 — — — 1.2 NGLs — — 3.1 — 3.1 Rail Loading Crude oil — 2.7 — (0.9) 1.8 Product Sales Natural gas 13.0 — 22.3 (12.9) 22.4 Crude oil 69.4 — 162.9 (15.6) 216.7 NGLs 16.4 — 145.6 (16.4) 145.6 Other — 0.2 0.3 (0.1) 0.4 Total Topic 606 revenues 190.1 5.4 337.6 (46.8) 486.3 Non-Topic 606 revenues (1) — — 32.9 — 32.9 Total revenues $ 190.1 $ 5.4 $ 370.5 $ (46.8) $ 519.2 (1) Represents revenues primarily related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Three Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Topic 606 revenues Gathering Natural gas $ 43.7 $ — $ — $ — $ 43.7 Crude oil 20.1 — — — 20.1 Water 21.3 — — — 21.3 Processing Natural gas 8.9 — — — 8.9 Compression Natural gas 6.4 — — — 6.4 Storage Crude oil 0.4 1.5 — (0.5) 1.4 NGLs — — 1.6 — 1.6 Pipeline Crude oil — 2.6 — (1.0) 1.6 Transportation Crude oil 2.2 — 1.4 (0.1) 3.5 NGLs — — 2.3 — 2.3 Rail Loading Crude oil — 2.4 — (1.2) 1.2 Product Sales Natural gas 10.3 — 13.8 (6.5) 17.6 Crude oil 170.0 — 383.6 (24.1) 529.5 NGLs 8.1 — 119.2 (2.8) 124.5 Other — 1.1 0.4 (0.9) 0.6 Total Topic 606 revenues 291.4 7.6 522.3 (37.1) 784.2 Non-Topic 606 revenues (1) — — 39.4 — 39.4 Total revenues $ 291.4 $ 7.6 $ 561.7 $ (37.1) $ 823.6 (1) Represents revenues primarily related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Nine Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Topic 606 revenues Gathering Natural gas $ 107.3 $ — $ — $ — $ 107.3 Crude oil 66.9 — — — 66.9 Water 66.4 — — — 66.4 Processing Natural gas 23.4 — — — 23.4 Compression Natural gas 18.0 — — — 18.0 Storage Crude oil 1.0 2.5 — (1.5) 2.0 NGLs — — 8.6 — 8.6 Pipeline Crude oil — 4.6 — (1.5) 3.1 NGLs — — 0.2 — 0.2 Transportation Crude oil 4.7 — 1.9 — 6.6 NGLs — — 7.4 — 7.4 Rail Loading Crude oil — 9.0 — (3.5) 5.5 Product Sales Natural gas 31.9 — 56.1 (31.4) 56.6 Crude oil 225.3 — 515.1 (39.0) 701.4 NGLs 28.9 — 398.3 (28.6) 398.6 Other — 0.9 1.0 (0.6) 1.3 Total Topic 606 revenues 573.8 17.0 988.6 (106.1) 1,473.3 Non-Topic 606 revenues (1) — — 126.5 — 126.5 Total revenues $ 573.8 $ 17.0 $ 1,115.1 $ (106.1) $ 1,599.8 (1) Represents revenues primarily related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Nine Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Topic 606 revenues Gathering Natural gas $ 116.8 $ — $ — $ — $ 116.8 Crude oil 50.5 — — — 50.5 Water 57.1 — — — 57.1 Processing Natural gas 19.5 — — — 19.5 Compression Natural gas 18.6 — — — 18.6 Storage Crude oil 1.4 4.4 — (1.7) 4.1 NGLs — — 4.2 — 4.2 Pipeline Crude oil — 5.8 — (2.2) 3.6 Transportation Crude oil 5.5 — 4.4 (0.1) 9.8 NGLs — — 8.5 — 8.5 Rail Loading Crude oil — 13.5 — (4.0) 9.5 Product Sales Natural gas 40.0 — 44.0 (17.9) 66.1 Crude oil 411.8 — 965.1 (83.4) 1,293.5 NGLs 30.4 — 474.6 (10.1) 494.9 Other — 3.4 0.7 (2.7) 1.4 Total Topic 606 revenues 751.6 27.1 1,501.5 (122.1) 2,158.1 Non-Topic 606 revenues (1) — — 184.1 — 184.1 Total revenues $ 751.6 $ 27.1 $ 1,685.6 $ (122.1) $ 2,342.2 (1) Represents revenues primarily 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, 2020
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, 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, 2020 and December 31, 2019, and for the three and nine months ended September 30, 2020 and 2019. 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, 2020 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Assets Current assets: Cash $ 0.3 $ — $ 13.4 $ — $ 13.7 Accounts receivable — 203.8 18.3 — 222.1 Inventory — 100.1 — — 100.1 Other current assets — 59.3 0.2 — 59.5 Total current assets 0.3 363.2 31.9 — 395.4 Property, plant and equipment, net — 2,323.3 776.2 — 3,099.5 Goodwill and intangible assets, net — 668.1 280.1 — 948.2 Operating lease right-of-use assets, net — 37.0 2.6 — 39.6 Investments in consolidated affiliates 4,437.6 — — (4,437.6) — Investments in unconsolidated affiliates — — 953.0 — 953.0 Other non-current assets — 2.6 0.5 — 3.1 Total assets $ 4,437.9 $ 3,394.2 $ 2,044.3 $ (4,437.6) $ 5,438.8 Liabilities and capital Current liabilities: Accounts payable $ — $ 136.2 $ 2.4 $ — $ 138.6 Other current liabilities 51.5 120.1 22.8 — 194.4 Total current liabilities 51.5 256.3 25.2 — 333.0 Long-term liabilities: Long-term debt, less current portion 2,548.9 — — — 2,548.9 Other long-term liabilities — 159.2 128.0 — 287.2 Deferred income taxes — 0.6 — — 0.6 Total liabilities 2,600.4 416.1 153.2 — 3,169.7 Interest of non-controlling partner in subsidiary — — 431.6 — 431.6 Partners’ capital 1,837.5 2,978.1 1,459.5 (4,437.6) 1,837.5 Total liabilities and capital $ 4,437.9 $ 3,394.2 $ 2,044.3 $ (4,437.6) $ 5,438.8 Crestwood Midstream Partners LP Condensed Consolidating Balance Sheet December 31, 2019 (in millions) Parent Guarantor Non- Eliminations Consolidated Assets Current assets: Cash $ 1.8 $ — $ 23.6 $ — $ 25.4 Accounts receivable — 229.1 12.8 — 241.9 Inventory — 53.7 — — 53.7 Other current assets — 54.6 0.2 — 54.8 Total current assets 1.8 337.4 36.6 — 375.8 Property, plant and equipment, net — 2,331.3 736.2 — 3,067.5 Goodwill and intangible assets, net — 650.7 373.4 — 1,024.1 Operating lease right-of-use assets, net — 51.0 2.8 — 53.8 Investments in consolidated affiliates 4,451.6 — — (4,451.6) — Investments in unconsolidated affiliates — — 980.4 — 980.4 Other non-current assets — 1.9 0.5 — 2.4 Total assets $ 4,453.4 $ 3,372.3 $ 2,129.9 $ (4,451.6) $ 5,504.0 Liabilities and capital Current liabilities: Accounts payable $ — $ 175.9 $ 10.7 $ — $ 186.6 Other current liabilities 25.8 123.9 17.6 — 167.3 Total current liabilities 25.8 299.8 28.3 — 353.9 Long-term liabilities: Long-term debt, less current portion 2,328.3 — — — 2,328.3 Other long-term liabilities — 174.8 120.8 — 295.6 Deferred income taxes — 0.7 — — 0.7 Total liabilities 2,354.1 475.3 149.1 — 2,978.5 Interest of non-controlling partner in subsidiary — — 426.2 — 426.2 Partners’ capital 2,099.3 2,897.0 1,554.6 (4,451.6) 2,099.3 Total liabilities and capital $ 4,453.4 $ 3,372.3 $ 2,129.9 $ (4,451.6) $ 5,504.0 Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended September 30, 2020 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Revenues $ — $ 506.6 $ 12.6 $ — $ 519.2 Costs of product/services sold — 358.7 — — 358.7 Operating expenses and other: Operations and maintenance — 26.1 4.9 — 31.0 General and administrative 10.4 8.1 — — 18.5 Depreciation, amortization and accretion — 49.7 14.5 — 64.2 (Gain) loss on long-lived assets, net — 22.2 (0.9) — 21.3 10.4 106.1 18.5 — 135.0 Operating income (loss) (10.4) 41.8 (5.9) — 25.5 Earnings from unconsolidated affiliates, net — — 10.5 — 10.5 Interest and debt expense, net (33.6) (0.1) — — (33.7) Equity in net income (loss) of subsidiaries 36.0 — — (36.0) — Net income (loss) (8.0) 41.7 4.6 (36.0) 2.3 Net income attributable to non-controlling partner in subsidiary — — 10.3 — 10.3 Net income (loss) attributable to Crestwood Midstream Partners LP $ (8.0) $ 41.7 $ (5.7) $ (36.0) $ (8.0) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended September 30, 2019 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Revenues $ — $ 801.1 $ 23.2 $ (0.7) $ 823.6 Costs of product/services sold — 657.4 0.7 (0.7) 657.4 Operating expenses: Operations and maintenance — 30.8 5.2 — 36.0 General and administrative 10.7 13.0 — — 23.7 Depreciation, amortization and accretion — 45.5 9.6 — 55.1 Loss on long-lived assets, net — 0.1 — — 0.1 10.7 89.4 14.8 — 114.9 Operating income (loss) (10.7) 54.3 7.7 — 51.3 Earnings from unconsolidated affiliates, net — — 10.4 — 10.4 Interest and debt expense, net (30.7) — 0.1 — (30.6) Equity in net income (loss) of subsidiaries 62.7 — — (62.7) — Income (loss) before income taxes 21.3 54.3 18.2 (62.7) 31.1 Benefit for income taxes — 0.1 — — 0.1 Net income (loss) 21.3 54.4 18.2 (62.7) 31.2 Net income attributable to non-controlling partner in subsidiary — — 9.9 — 9.9 Net income (loss) attributable to Crestwood Midstream Partners LP $ 21.3 $ 54.4 $ 8.3 $ (62.7) $ 21.3 Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Nine Months Ended September 30, 2020 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Revenues $ — $ 1,543.5 $ 56.3 $ — $ 1,599.8 Costs of product/services sold — 1,118.6 0.2 — 1,118.8 Operating expenses and other: Operations and maintenance — 84.4 15.8 — 100.2 General and administrative 43.1 17.3 — — 60.4 Depreciation, amortization and accretion — 147.8 40.6 — 188.4 Loss on long-lived assets, net — 25.2 0.9 — 26.1 Goodwill impairment — — 80.3 — 80.3 43.1 274.7 137.6 — 455.4 Operating income (loss) (43.1) 150.2 (81.5) — 25.6 Earnings from unconsolidated affiliates, net — — 24.4 — 24.4 Interest and debt expense, net (99.9) (0.4) — — (100.3) Equity in net income (loss) of subsidiaries 62.5 — — (62.5) — Income (loss) before income taxes (80.5) 149.8 (57.1) (62.5) (50.3) Benefit for income taxes — 0.2 — — 0.2 Net income (loss) (80.5) 150.0 (57.1) (62.5) (50.1) Net income attributable to non-controlling partner — — 30.4 — 30.4 Net income (loss) attributable to Crestwood Midstream Partners LP $ (80.5) $ 150.0 $ (87.5) $ (62.5) $ (80.5) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Nine Months Ended September 30, 2019 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Revenues $ — $ 2,299.5 $ 43.4 $ (0.7) $ 2,342.2 Costs of product/services sold — 1,890.2 0.7 (0.7) 1,890.2 Operating expenses and other: Operations and maintenance — 86.9 12.4 — 99.3 General and administrative 39.1 41.5 — — 80.6 Depreciation, amortization and accretion — 131.9 19.3 — 151.2 Loss on long-lived assets, net — 2.1 — — 2.1 Gain on acquisition — — (209.4) — (209.4) 39.1 262.4 (177.7) — 123.8 Operating income (loss) (39.1) 146.9 220.4 — 328.2 Earnings from unconsolidated affiliates, net — — 21.0 — 21.0 Interest and debt income (expense), net (83.4) — 0.1 — (83.3) Equity in net income (loss) of subsidiaries 363.7 — — (363.7) — Income (loss) before income taxes 241.2 146.9 241.5 (363.7) 265.9 Provision for income taxes — (0.2) — — (0.2) Net income (loss) 241.2 146.7 241.5 (363.7) 265.7 Net income attributable to non-controlling partner in subsidiary — — 24.5 — 24.5 Net income (loss) attributable to Crestwood Midstream Partners LP $ 241.2 $ 146.7 $ 217.0 $ (363.7) $ 241.2 Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Nine Months Ended September 30, 2020 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Cash flows from operating activities $ (112.4) $ 314.3 $ 92.1 $ — $ 294.0 Cash flows from investing activities: Acquisition, net of cash acquired — (162.3) — — (162.3) Purchases of property, plant and equipment — (66.1) (92.7) — (158.8) Investment in unconsolidated affiliates — — (6.0) — (6.0) Capital distributions from unconsolidated affiliates — — 27.8 — 27.8 Capital distributions from consolidated affiliates 7.4 — — (7.4) — Other — 0.6 1.0 — 1.6 Net cash provided by (used in) investing activities 7.4 (227.8) (69.9) (7.4) (297.7) Cash flows from financing activities: Proceeds from the issuance of long-term debt 947.0 — — — 947.0 Payments on long-term debt (731.1) — — — (731.1) Payments on finance leases — (2.4) — — (2.4) Net proceeds from issuance of non-controlling interest — — 2.8 — 2.8 Distributions to partners (180.9) — (27.8) — (208.7) Distributions to parent — — (7.4) 7.4 — Taxes paid for unit-based compensation vesting — (15.6) — — (15.6) Change in intercompany balances 68.5 (68.5) — — — Net cash provided by (used in) financing activities 103.5 (86.5) (32.4) 7.4 (8.0) Net change in cash (1.5) — (10.2) — (11.7) Cash at beginning of period 1.8 — 23.6 — 25.4 Cash at end of period $ 0.3 $ — $ 13.4 $ — $ 13.7 Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Nine Months Ended September 30, 2019 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Cash flows from operating activities $ (100.2) $ 322.1 $ 59.1 $ — $ 281.0 Cash flows from investing activities: Acquisition, net of cash acquired — — (462.1) — (462.1) Purchases of property, plant and equipment — (209.6) (137.4) — (347.0) Investment in unconsolidated affiliates — — (52.3) — (52.3) Capital distributions from unconsolidated affiliates — — 27.3 — 27.3 Capital contributions to consolidated affiliates (239.6) — — 239.6 — Other — (0.4) — — (0.4) Net cash provided by (used in) investing activities (239.6) (210.0) (624.5) 239.6 (834.5) Cash flows from financing activities: Proceeds from the issuance of long-term debt 1,993.7 — — — 1,993.7 Payments on long-term debt (1,474.3) (0.9) — — (1,475.2) Payments on finance leases — (2.6) — — (2.6) Payments for debt-related deferred costs (9.0) — — — (9.0) Net proceeds from the issuance of non-controlling interest — — 235.0 — 235.0 Distributions to partners (177.3) — (15.8) — (193.1) Contributions from parent — — 239.6 (239.6) — Taxes paid for unit-based compensation vesting — (10.9) — — (10.9) Change in intercompany balances (9.3) (97.7) 107.0 — — Net cash provided by (used in) financing activities 323.8 (112.1) 565.8 (239.6) 537.9 Net change in cash (16.0) — 0.4 — (15.6) Cash at beginning of period 16.5 — — — 16.5 Cash at end of period $ 0.5 $ — $ 0.4 $ — $ 0.9

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies There were no material changes in our significant accounting policies from those described in our 2019 Annual Report on Form 10-K. Below is an update of our accounting policies related to Goodwill and Accounts Receivable. Goodwill Our goodwill represents the excess of the amount we paid for a business over the fair value of the net identifiable assets acquired. We evaluate goodwill for impairment annually on December 31, and whenever events indicate that it is more likely than not that the fair value of a reporting unit could be less than its carrying amount. This evaluation requires us to compare the fair value of each of our reporting units to its carrying value (including goodwill). If the fair value exceeds the carrying amount, goodwill of the reporting unit is not considered impaired. We estimate the fair value of our reporting units based on a number of factors, including discount rates, projected cash flows and the potential value we would receive if we sold the reporting unit. Estimating projected cash flows requires us to make certain assumptions as it relates to the future operating performance of each of our reporting units (which includes assumptions, among others, about estimating future operating margins and related future growth in those margins, contracting efforts and the cost and timing of facility expansions) and assumptions related to our customers, such as their future capital and operating plans and their financial condition. When considering operating performance, various factors are considered such as current and changing economic conditions and the commodity price environment, among others. Due to the imprecise nature of these projections and assumptions, actual results can and often do, differ from our estimates. If the assumptions embodied in the projections prove inaccurate, we could incur a future impairment charge. In addition, the use of the income approach to determine the fair value of our reporting units (see further discussion of the use of the income approach below) could result in a different fair value if we had utilized a market approach, or a combination thereof. The following table summarizes the goodwill of our various reporting units (in millions) : Impairment during the December 31, 2019 September 30, 2020 September 30, 2020 Gathering and Processing Arrow $ 45.9 $ — $ 45.9 Powder River Basin 80.3 80.3 — Marketing, Supply and Logistics NGL Marketing and Logistics 92.7 — 92.7 Total $ 218.9 $ 80.3 $ 138.6 During the first quarter of 2020, current and forward commodity prices significantly declined from their levels at December 31, 2019 due primarily to the decreases in energy demand as a result of the outbreak of the COVID-19 pandemic and actions taken by the Organization of the Petroleum Exporting Countries, Russia, the United States and other oil-producing countries relating to the oversupply of oil. We currently anticipate that the decrease in commodity prices will have a negative impact on certain of our customers in our gathering and processing segment, which could adversely impact the financial performance of certain of the reporting units within those operations. Upon acquisition, we are required to record the assets, liabilities and goodwill of a reporting unit at its fair value on the date of acquisition. As a result, any level of decrease in the forecasted cash flows of these businesses or increases in the discount rates utilized to value those businesses from their respective acquisition dates would likely result in the fair value of the reporting unit falling below the carrying value of the reporting unit, and could result in an assessment of whether that reporting unit's goodwill is impaired. We acquired our Powder River Basin reporting unit in 2019 and recorded it at fair value at that time. Based on the events that occurred during the first quarter of 2020 described above, we determined that the forecasted cash flows, and therefore the fair value, of our Powder River Basin reporting unit significantly decreased during the first quarter of 2020, and accordingly performed a quantitative impairment assessment of the goodwill related to that reporting unit during that period. Based on our quantitative assessment, which utilized the income approach, we determined that the goodwill associated with the Powder River Basin reporting unit should be fully impaired during the first quarter of 2020, and accordingly recorded an $80.3 million impairment of the goodwill attributed to that reporting unit during the first quarter of 2020. We did not record any impairments of the goodwill associated with our Arrow or NGL Marketing and Logistics reporting units during the nine months ended September 30, 2020, as we do not have indicators that it is more likely than not that the fair value of those reporting units has declined to below their carrying value at September 30, 2020. Accounts Receivable Effective January 1, 2020, we adopted the provision of Accounting Standards Update 2016-13 Financial Instruments - Credit Losses (Topic 326) , which provides revised guidance on evaluating accounts and notes receivable and other financial instruments for impairment. We record accounts receivable when products or services are delivered and it is probable that payment will be received for those products or services, and we do not record any interest or penalties on accounts receivable that are past due under the terms of the related arrangement or invoice until those amounts are received. Topic 326 requires companies to evaluate their financial instruments for impairment by recording an allowance for doubtful accounts and/or bad debt expense based on certain categories of instruments rather than a specific identification approach. We adopted the provisions of this standard using a method to estimate the allowance for doubtful accounts that considered both the aging of our accounts receivable and the projected loss rate of our receivables. We write off accounts receivable, and the related allowance for doubtful accounts, when it becomes remote that payment for products or services will be received. On January 1, 2020, we recorded a $0.7 million increase to our allowance for doubtful accounts and a $0.7 million decrease to partners’ capital to reflect the cumulative effect of adopting the new standard. In addition, on January 1, 2020, Crestwood Permian Basin Holdings LLC (Crestwood Permian), our 50% equity investment, also adopted the provisions of Topic 326 and we recorded a decrease of approximately $0.2 million to our equity 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. The adoption of this standard was not material to our other equity investments.
New Accounting Pronouncements Issued But Not Yet Adopted	Accounts Receivable Effective January 1, 2020, we adopted the provision of Accounting Standards Update 2016-13 Financial Instruments - Credit Losses (Topic 326) , which provides revised guidance on evaluating accounts and notes receivable and other financial instruments for impairment. We record accounts receivable when products or services are delivered and it is probable that payment will be received for those products or services, and we do not record any interest or penalties on accounts receivable that are past due under the terms of the related arrangement or invoice until those amounts are received. Topic 326 requires companies to evaluate their financial instruments for impairment by recording an allowance for doubtful accounts and/or bad debt expense based on certain categories of instruments rather than a specific identification approach. We adopted the provisions of this standard using a method to estimate the allowance for doubtful accounts that considered both the aging of our accounts receivable and the projected loss rate of our receivables. We write off accounts receivable, and the related allowance for doubtful accounts, when it becomes remote that payment for products or services will be received. On January 1, 2020, we recorded a $0.7 million increase to our allowance for doubtful accounts and a $0.7 million decrease to partners’ capital to reflect the cumulative effect of adopting the new standard. In addition, on January 1, 2020, Crestwood Permian Basin Holdings LLC (Crestwood Permian), our 50% equity investment, also adopted the provisions of Topic 326 and we recorded a decrease of approximately $0.2 million to our equity 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. The adoption of this standard was not material to our other equity investments.

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Summary of Goodwill	The following table summarizes the goodwill of our various reporting units (in millions) : Impairment during the December 31, 2019 September 30, 2020 September 30, 2020 Gathering and Processing Arrow $ 45.9 $ — $ 45.9 Powder River Basin 80.3 80.3 — Marketing, Supply and Logistics NGL Marketing and Logistics 92.7 — 92.7 Total $ 218.9 $ 80.3 $ 138.6

Certain Balance Sheet Informa_2

Certain Balance Sheet Information (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 2019 2020 2019 Accrued expenses $ 36.6 $ 61.6 $ 34.9 $ 60.3 Accrued property taxes 8.0 6.1 8.0 6.1 Income tax payable 0.2 0.3 0.2 0.3 Interest payable 51.3 25.6 51.3 25.6 Accrued additions to property, plant and equipment 10.6 38.0 10.6 38.0 Contingent consideration 19.0 — 19.0 — Operating leases 16.5 18.1 16.5 18.1 Finance leases 3.0 3.2 3.0 3.2 Deferred revenue 11.3 8.8 11.3 8.8 Total accrued expenses and other liabilities $ 156.5 $ 161.7 $ 154.8 $ 160.4
Schedule of Other Long-Term Liabilities	Other long-term liabilities consisted of the following ( in millions ): CEQP CMLP September 30, December 31, September 30, December 31, 2020 2019 2020 2019 Contract liabilities $ 166.9 $ 144.7 $ 166.9 $ 144.7 Contingent consideration 38.0 57.0 38.0 57.0 Operating leases 29.6 41.5 29.6 41.5 Asset retirement obligations 33.7 33.3 33.7 33.3 Other 20.9 25.1 19.0 19.1 Total other long-term liabilities $ 289.1 $ 301.6 $ 287.2 $ 295.6

Investments in Unconsolidated_2

Investments in Unconsolidated Affiliates (Tables)	9 Months Ended
	Sep. 30, 2020
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 Earnings (Loss) from September 30, December 31, Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 2020 2019 Stagecoach Gas Services LLC (1) $ 798.2 $ 814.4 $ 9.9 $ 10.5 $ 28.3 $ 23.9 Crestwood Permian Basin Holdings LLC (2) 113.4 121.8 0.5 (0.5) 0.3 (7.2) Tres Palacios Holdings LLC (3) 37.7 35.9 0.1 0.5 0.2 0.8 Powder River Basin Industrial Complex, LLC (4) 3.7 8.3 — (0.1) (4.4) (0.2) Jackalope Gas Gathering Services, L.L.C. (5) — — — — — 3.7 Total $ 953.0 $ 980.4 $ 10.5 $ 10.4 $ 24.4 $ 21.0 (1) As of September 30, 2020, our equity in the underlying net assets of Stagecoach Gas Services LLC (Stagecoach Gas) exceeded our investment balance by approximately $51.3 million. This excess amount is entirely attributable to goodwill and, as such, is not subject to amortization. Our Stagecoach Gas investment is included in our storage and transportation segment. (2) As of September 30, 2020, our equity in the underlying net assets of Crestwood Permian exceeded our investment balance by $9.3 million, and this excess amount is not subject to amortization. Our Crestwood Permian investment is included in our gathering and processing segment. (3) As of September 30, 2020, our equity in the underlying net assets of Tres Palacios Holdings LLC (Tres Holdings) exceeded our investment balance by approximately $23.1 million. Our Tres Holdings investment is included in our storage and transportation segment. (4) As of September 30, 2020, our equity in the underlying net assets of Powder River Basin Industrial Complex, LLC (PRBIC) approximates our investment balance. During the first quarter of 2020, we recorded our share of a long-lived asset impairment recorded by our PRBIC equity investment, which eliminated our $5.5 million historical basis difference between our investment balance and the equity in the underlying net assets of PRBIC, and also resulted in a $4.5 million reduction in our earnings from unconsolidated affiliates during the nine months ended September 30, 2020. Our PRBIC investment is included in our storage and transportation segment. (5) On April 9, 2019, Crestwood Niobrara acquired Williams 50% equity interest in Jackalope, and as a result, Crestwood Niobrara controls and owns 100% of the equity interests in Jackalope. As a result of this transaction, we eliminated our historical equity investment in Jackalope and began consolidating Jackalope’s operations. Our Jackalope investment was included in our gathering and processing segment. 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, 2020 2019 Operating Revenues Operating Expenses Net Income (Loss) Operating Revenues Operating Expenses Net Income (Loss) Stagecoach Gas $ 115.3 $ 58.9 $ 56.5 $ 120.8 $ 61.1 $ 60.0 Other (1) 91.2 113.0 (21.0) 84.3 92.1 (8.9) Total $ 206.5 $ 171.9 $ 35.5 $ 205.1 $ 153.2 $ 51.1 (1) Includes our Crestwood Permian, Tres Holdings and PRBIC equity investments during the nine months ended September 30, 2020 and 2019, and our Jackalope equity investment during the nine months ended September 30, 2019 (prior to the acquisition of the remaining 50% equity interest from Williams in April 2019). 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 Tres Holdings equity investment of $0.9 million during both the nine months ended September 30, 2020 and 2019. We recorded amortization of the excess basis in our PRBIC and Jackalope equity investments of $0.3 million and less than $0.1 million, respectively, during the nine months ended September 30, 2019. Distributions and Contributions The following table summarizes our distributions from and contributions to our unconsolidated affiliates (in millions) : Distributions (1) Contributions Nine Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Stagecoach Gas $ 44.5 $ 37.2 $ — $ — Crestwood Permian 8.5 2.9 — 21.4 Tres Holdings 4.4 3.5 6.0 6.3 PRBIC 0.2 — — 0.2 Jackalope — 11.6 — 24.4 Total $ 57.6 $ 55.2 $ 6.0 $ 52.3 (1) In October 2020, we received cash distributions from Stagecoach Gas, Crestwood Permian and Tres Holdings of approximately $15.3 million, $3.4 million and $2.0 million, respectively.

Risk Management (Tables)

Risk Management (Tables)	9 Months Ended
	Sep. 30, 2020
Risk Management - Notional Amounts and Terms of Companys Derivative Financial Instruments [Abstract]
Summary of Commodity-Based Derivatives	The following table summarizes the impact to our consolidated statements of operations related to our commodity-based derivatives reflected in operating revenues and costs of product/services sold during the three and nine months ended September 30, 2020 and 2019 ( in millions ): Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Product revenues $ 32.4 $ 39.1 $ 125.4 $ 183.4 Gain (loss) reflected in costs of product/services sold $ (1.8) $ 14.9 $ 27.0 $ 21.9
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, 2020 December 31, 2019 Fixed Price Fixed Price Fixed Price Fixed Price Propane, ethane, butane, heating oil and crude oil (MMBbls) 73.5 78.8 33.5 36.6 Natural gas (Bcf) 18.8 26.1 3.7 8.7
Schedule of Derivative Instruments	The following table presents the fair value of our commodity derivative instruments with credit-risk related contingent features and their associated collateral ( in millions ): September 30, 2020 December 31, 2019 Aggregate fair value liability of derivative instruments with credit-risk-related contingent features (1) $ 21.0 $ 1.6 NYMEX-related net derivative asset (liability) position $ 16.1 $ (28.8) NYMEX-related cash collateral posted $ 1.5 $ 40.4 Cash collateral received, net $ 17.9 $ 16.9

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	The following table represents the carrying amount (reduced for deferred financing costs associated with the respective notes) and fair value of our senior notes ( in millions ): September 30, 2020 December 31, 2019 Carrying Fair Carrying Fair 2023 Senior Notes $ 689.5 $ 677.9 $ 695.1 $ 714.0 2025 Senior Notes $ 495.2 $ 458.2 $ 494.4 $ 514.4 2027 Senior Notes $ 592.9 $ 536.3 $ 592.1 $ 610.1
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, 2020 and December 31, 2019 ( in millions ): September 30, 2020 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 $ 15.0 $ 188.0 $ — $ 203.0 $ (170.4) $ (5.0) $ 27.6 Suburban Propane Partners, L.P. units (2) 2.3 — — 2.3 — — 2.3 Total assets at fair value $ 17.3 $ 188.0 $ — $ 205.3 $ (170.4) $ (5.0) $ 29.9 Liabilities Liabilities from price risk management $ 17.9 $ 180.5 $ — $ 198.4 $ (170.4) $ 11.4 $ 39.4 Total liabilities at fair value $ 17.9 $ 180.5 $ — $ 198.4 $ (170.4) $ 11.4 $ 39.4 December 31, 2019 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 $ 3.7 $ 164.0 $ — $ 167.7 $ (122.3) $ (2.2) $ 43.2 Suburban Propane Partners, L.P. units (2) 3.1 — — 3.1 — — 3.1 Total assets at fair value $ 6.8 $ 164.0 $ — $ 170.8 $ (122.3) $ (2.2) $ 46.3 Liabilities Liabilities from price risk management $ 2.8 $ 151.9 $ — $ 154.7 $ (122.3) $ (25.7) $ 6.7 Total liabilities at fair value $ 2.8 $ 151.9 $ — $ 154.7 $ (122.3) $ (25.7) $ 6.7 (1) Amounts represent the impact of legally enforceable master netting agreements that allow us to settle positive and negative positions. (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, 2020
Debt Disclosure [Abstract]
Components Of Long-Term Debt	Long-term debt consisted of the following at September 30, 2020 and December 31, 2019 ( in millions ): September 30, December 31, Credit Facility $ 779.8 $ 557.0 2023 Senior Notes 693.2 700.0 2025 Senior Notes 500.0 500.0 2027 Senior Notes 600.0 600.0 Other 0.4 0.6 Less: deferred financing costs, net 24.3 29.1 Total debt 2,549.1 2,328.5 Less: current portion 0.2 0.2 Total long-term debt, less current portion $ 2,548.9 $ 2,328.3

Earnings Per Limited Partner _2

Earnings Per Limited Partner Unit (Tables)	9 Months Ended
	Sep. 30, 2020
Earnings Per Share [Abstract]
Summary of Weighted-Average Units Excluded and Basic and Diluted Limited Partner Units	The following table summarizes information regarding the weighted-average of units excluded during the three and nine months ended September 30, 2020 and 2019 (in millions) : Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Preferred units (1) 7.1 7.1 7.1 7.1 Crestwood Niobrara’s preferred units (1) 8.7 — 8.7 — Unit-based compensation performance units (1) 0.2 — 0.3 — Subordinated units (1) 0.4 — 0.4 — (1) For additional information regarding the potential conversion/redemption of our preferred units and Crestwood Niobrara’s preferred units to CEQP common units, and of our performance units and subordinated units, see our 2019 Annual Report on Form 10-K. The table below shows CEQP’s net income (loss) per limited partner unit based on the number of basic and diluted limited partner units outstanding for the three and nine months ended September 30, 2020 and 2019 (in millions, except per unit amounts) : Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Common unitholders’ interest in net income (loss) $ (20.7) $ 8.6 $ (118.5) $ 202.0 Dilutive effect of net income attributable to subordinated units — 0.1 — 1.2 Diluted net income (loss) $ (20.7) $ 8.7 $ (118.5) $ 203.2 Weighted-average limited partners’ units outstanding - basic 73.4 71.8 73.1 71.8 Dilutive effect of Crestwood Niobrara preferred units — 3.0 — 3.9 Dilutive effect of stock-based compensation performance units — 0.3 — 0.3 Dilutive effect of subordinated units — 0.4 — 0.4 Weighted-average limited partners’ units outstanding - diluted 73.4 75.5 73.1 76.4 Basic earnings per unit: Net income (loss) per limited partner unit $ (0.28) $ 0.12 $ (1.62) $ 2.81 Diluted earnings per unit: Net income (loss) per limited partner unit $ (0.28) $ 0.12 $ (1.62) $ 2.66

Partners' Capital (Tables)

Partners' Capital (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 and 2019 is presented below: Record Date Payment Date Per Unit Rate Cash Distributions ( in millions ) 2020 February 7, 2020 February 14, 2020 $ 0.625 $ 45.3 May 8, 2020 May 15, 2020 0.625 45.7 August 7, 2020 August 14, 2020 0.625 45.7 $ 136.7 2019 February 7, 2019 February 14, 2019 $ 0.60 $ 43.1 May 8, 2019 May 15, 2019 0.60 43.1 August 7, 2019 August 14, 2019 0.60 43.1 $ 129.3
Summary of Change in Non-Controlling Interest in Subsidiary	The following table shows the change in our non-controlling interest in subsidiary at September 30, 2020 and 2019 (in millions) : Balance at December 31, 2019 $ 426.2 Contributions from non-controlling partner 2.8 Distributions to non-controlling partner (27.8) Net income attributable to non-controlling partner 30.4 Balance at September 30, 2020 $ 431.6 Balance at December 31, 2018 $ — Reclassification of Series A-2 Preferred Units 178.8 Issuance of Series A-3 Preferred Units 235.0 Distributions to non-controlling partner (9.2) Net income attributable to non-controlling partner 20.5 Balance at September 30, 2019 $ 425.1

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Summary of Self-Insurance Reserves	The following table summarizes CEQP’s and CMLP’s self-insurance reserves at September 30, 2020 and December 31, 2019 ( in millions ): CEQP CMLP September 30, 2020 December 31, 2019 September 30, 2020 December 31, 2019 Self-insurance reserves (1) $ 9.4 $ 9.7 $ 8.4 $ 8.3 (1) At September 30, 2020, CEQP and CMLP classified approximately $6.2 million and $5.2 million, respectively of these reserves as other long-term liabilities on their consolidated balance sheets.
Summary of Balance Sheet Information Related to Operating and Finance Leases	The following table summarizes the balance sheet information related to our operating and finance leases at September 30, 2020 and December 31, 2019 (in millions ): September 30, December 31, 2020 2019 Operating Leases Operating lease right-of-use assets, net $ 39.6 $ 53.8 Accrued expenses and other liabilities $ 16.5 $ 18.1 Long-term operating lease liabilities 29.6 41.5 Total operating lease liabilities $ 46.1 $ 59.6 Finance Leases Property, plant and equipment $ 13.5 $ 14.9 Less: accumulated depreciation 7.2 5.4 Property, plant and equipment, net $ 6.3 $ 9.5 Accrued expenses and other liabilities $ 3.0 $ 3.2 Other long-term liabilities 2.7 5.2 Total finance lease liabilities $ 5.7 $ 8.4

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2020
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 ). For a further description of our related party agreements, see our 2019 Annual Report on Form 10-K. Three Months Ended Nine Months Ended September 30, September 30, 2020 2019 2020 2019 Revenues at CEQP and CMLP (1) $ 10.9 $ 0.3 $ 25.9 $ 2.8 Costs of product/services sold at CEQP and CMLP (2) $ 6.1 $ 3.8 $ 12.9 $ 39.1 Operations and maintenance expenses charged by CEQP and CMLP (3) $ 5.0 $ 6.3 $ 16.7 $ 19.7 General and administrative expenses charged by CEQP to CMLP, net (4) $ 7.4 $ 7.9 $ 25.4 $ 29.0 General and administrative expenses at CEQP charged to (from) Crestwood Holdings, net (5) $ 1.2 $ 0.3 $ 12.5 $ (5.0) (1) Includes $10.9 million and $25.9 million during the three and nine months ended September 30, 2020 primarily related to the sale of NGLs to a subsidiary of Crestwood Permian and $0.3 million and $1.6 million during the three and nine months ended September 30, 2019 related to the sale of NGLs to a subsidiary of Crestwood Permian and $1.2 million during the nine months ended September 30, 2019 related to the sale of natural gas to a subsidiary of Stagecoach Gas. (2) Includes (i) $5.7 million and $12.1 million during the three and nine months ended September 30, 2020 and $3.6 million and $12.7 million during the three and nine months ended September 30, 2019 related to purchases of NGLs from a subsidiary of Crestwood Permian; (ii) $0.3 million and $0.4 million during the three and nine months ended September 30, 2020 related to storage services provided by a subsidiary of Tres Holdings, (iii) $0.1 million and $0.4 million during the three and nine months ended September 30, 2020 and less than $0.1 million and $23.9 million during the three and nine months ended September 30, 2019 related to an agency marketing agreement with Ascent Resources - Utica, LLC, an affiliate of Crestwood Holdings; (iv) less than $0.1 million and $2.3 million during the three and nine months ended September 30, 2019 related to purchases of natural gas from a subsidiary of Stagecoach Gas; and (v) $0.2 million during both the three and nine months ended September 30, 2019 related to purchases of NGLs from Blue Racer Midstream, LLC, an affiliate of Crestwood Holdings. (3) 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 operations. During the three and nine months ended September 30, 2020, we charged $1.7 million and $5.0 million to Stagecoach Gas, $0.9 million and $3.1 million to Tres Holdings, and $2.4 million and $8.6 million to Crestwood Permian under these agreements. During the three and nine months ended September 30, 2019, we charged $1.8 million and $5.7 million to Stagecoach Gas, $1.1 million and $3.3 million to Tres Holdings, and $3.4 million and $10.2 million to Crestwood Permian. During the nine months ended September 30, 2019, we charged $0.5 million to Jackalope under an operating agreement prior to our acquisition of the remaining 50% equity interest in Jackalope in Williams. (4) Includes $8.4 million and $28.5 million of unit-based compensation charges allocated from CEQP to CMLP for the three and nine months ended September 30, 2020 and $8.9 million and $31.8 million for the three and nine months ended September 30, 2019. In addition, includes $1.0 million and $3.1 million of CMLP’s general and administrative costs allocated to CEQP during the three and nine months ended September 30, 2020 and $1.0 million and $2.8 million during the three and nine months ended September 30, 2019. (5) Includes a $0.3 million and $11.2 million reduction of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three and nine months ended September 30, 2020 and $0.4 million and $6.1 million of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three and nine months ended September 30, 2019. In addition, includes $0.9 million and $1.3 million of CEQP’s general and administrative costs allocated to Crestwood Holdings during the three and nine months ended September 30, 2020 and $0.7 million and $1.1 million during the three and nine months ended September 30, 2019.
Schedule of Related Party Receivables and Payables	The following table shows accounts receivable and accounts payable with our affiliates ( in millions ): September 30, December 31, Accounts receivable at CEQP and CMLP $ 20.1 $ 7.3 Accounts payable at CEQP $ 13.8 $ 15.6 Accounts payable at CMLP $ 11.3 $ 13.1

Segments (Tables)

Segments (Tables)	9 Months Ended
	Sep. 30, 2020
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, 2020 2019 2020 2019 Net income (loss) $ 4.6 $ 33.6 $ (43.1) $ 272.7 Add: Interest and debt expense, net 33.7 30.6 100.3 83.3 Provision (benefit) for income taxes — — (0.1) 0.3 Depreciation, amortization and accretion 60.8 51.5 177.9 140.6 EBITDA $ 99.1 $ 115.7 $ 235.0 $ 496.9
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, 2020 and 2019 ( 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 our 2019 Annual Report on Form 10-K. Included in earnings from unconsolidated affiliates, net below was approximately $9.9 million and $9.7 million of our proportionate share of interest expense, depreciation and amortization expense and gains (losses) on long-lived assets, net recorded by our equity investments for the three months ended September 30, 2020 and 2019 and $33.2 million and $32.7 million for the nine months ended September 30, 2020 and 2019. Crestwood Equity Three Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 145.2 $ 3.5 $ 370.5 $ — $ 519.2 Intersegment revenues 44.9 1.9 (46.8) — — Costs of product/services sold 63.2 — 295.5 — 358.7 Operations and maintenance expense 19.4 0.7 10.9 — 31.0 General and administrative expense — — — 19.6 19.6 Gain (loss) on long-lived assets, net (19.1) — (2.4) 0.2 (21.3) Earnings from unconsolidated affiliates, net 0.5 10.0 — — 10.5 EBITDA $ 88.9 $ 14.7 $ 14.9 $ (19.4) $ 99.1 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 3,544.2 $ 955.1 $ 766.9 $ 28.0 $ 5,294.2 Three Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 257.8 $ 4.1 $ 561.7 $ — $ 823.6 Intersegment revenues 33.6 3.5 (37.1) — — Costs of product/services sold 164.1 0.1 493.2 — 657.4 Operations and maintenance expense 27.5 1.1 7.4 — 36.0 General and administrative expense — — — 24.9 24.9 Loss on long-lived assets, net (0.1) — — — (0.1) Earnings (loss) from unconsolidated affiliates, net (0.5) 10.9 — — 10.4 Other income, net — — — 0.1 0.1 EBITDA $ 99.2 $ 17.3 $ 24.0 $ (24.8) $ 115.7 Nine Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 474.6 $ 10.1 $ 1,115.1 $ — $ 1,599.8 Intersegment revenues 99.2 6.9 (106.1) — — Costs of product/services sold 192.8 0.3 925.7 — 1,118.8 Operations and maintenance expense 65.7 2.8 31.7 — 100.2 General and administrative expense — — — 64.0 64.0 Gain (loss) on long-lived assets, net (23.7) — (2.6) 0.2 (26.1) Goodwill impairment (80.3) — — — (80.3) Earnings from unconsolidated affiliates, net 0.3 24.1 — — 24.4 Other income, net — — — 0.2 0.2 EBITDA $ 211.6 $ 38.0 $ 49.0 $ (63.6) $ 235.0 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 3,544.2 $ 955.1 $ 766.9 $ 28.0 $ 5,294.2 Nine Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 639.8 $ 16.8 $ 1,685.6 $ — $ 2,342.2 Intersegment revenues 111.8 10.3 (122.1) — — Costs of product/services sold 411.0 0.1 1,479.1 — 1,890.2 Operations and maintenance expense 70.2 3.0 26.1 — 99.3 General and administrative expense — — — 84.4 84.4 Gain (loss) on long-lived assets, net (2.1) — (0.2) 0.2 (2.1) Gain on acquisition 209.4 — — — 209.4 Earnings (loss) from unconsolidated affiliates, net (3.5) 24.5 — — 21.0 Other income, net — — — 0.3 0.3 EBITDA $ 474.2 $ 48.5 $ 58.1 $ (83.9) $ 496.9
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, 2020 2019 2020 2019 Net income (loss) $ 2.3 $ 31.2 $ (50.1) $ 265.7 Add: Interest and debt expense, net 33.7 30.6 100.3 83.3 Provision (benefit) for income taxes — (0.1) (0.2) 0.2 Depreciation, amortization and accretion 64.2 55.1 188.4 151.2 EBITDA $ 100.2 $ 116.8 $ 238.4 $ 500.4
Summary Of Segment Information	Crestwood Midstream Three Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 145.2 $ 3.5 $ 370.5 $ — $ 519.2 Intersegment revenues 44.9 1.9 (46.8) — — Costs of product/services sold 63.2 — 295.5 — 358.7 Operations and maintenance expense 19.4 0.7 10.9 — 31.0 General and administrative expense — — — 18.5 18.5 Gain (loss) on long-lived assets, net (19.1) — (2.4) 0.2 (21.3) Earnings from unconsolidated affiliates, net 0.5 10.0 — — 10.5 EBITDA $ 88.9 $ 14.7 $ 14.9 $ (18.3) $ 100.2 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 3,692.9 $ 955.1 $ 766.9 $ 23.9 $ 5,438.8 Three Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 257.8 $ 4.1 $ 561.7 $ — $ 823.6 Intersegment revenues 33.6 3.5 (37.1) — — Costs of product/services sold 164.1 0.1 493.2 — 657.4 Operations and maintenance expense 27.5 1.1 7.4 — 36.0 General and administrative expense — — — 23.7 23.7 Loss on long-lived assets, net (0.1) — — — (0.1) Earnings (loss) from unconsolidated affiliates, net (0.5) 10.9 — — 10.4 EBITDA $ 99.2 $ 17.3 $ 24.0 $ (23.7) $ 116.8 Nine Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 474.6 $ 10.1 $ 1,115.1 $ — $ 1,599.8 Intersegment revenues 99.2 6.9 (106.1) — — Costs of product/services sold 192.8 0.3 925.7 — 1,118.8 Operations and maintenance expense 65.7 2.8 31.7 — 100.2 General and administrative expense — — — 60.4 60.4 Gain (loss) on long-lived assets, net (23.7) — (2.6) 0.2 (26.1) Goodwill impairment (80.3) — — — (80.3) Earnings from unconsolidated affiliates, net 0.3 24.1 — — 24.4 EBITDA $ 211.6 $ 38.0 $ 49.0 $ (60.2) $ 238.4 Goodwill $ 45.9 $ — $ 92.7 $ — $ 138.6 Total assets $ 3,692.9 $ 955.1 $ 766.9 $ 23.9 $ 5,438.8 Nine Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Corporate Total Revenues $ 639.8 $ 16.8 $ 1,685.6 $ — $ 2,342.2 Intersegment revenues 111.8 10.3 (122.1) — — Costs of product/services sold 411.0 0.1 1,479.1 — 1,890.2 Operations and maintenance expense 70.2 3.0 26.1 — 99.3 General and administrative expense — — — 80.6 80.6 Gain (loss) on long-lived assets, net (2.1) — (0.2) 0.2 (2.1) Gain on acquisition 209.4 — — — 209.4 Earnings (loss) from unconsolidated affiliates, net (3.5) 24.5 — — 21.0 EBITDA $ 474.2 $ 48.5 $ 58.1 $ (80.4) $ 500.4

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue Recognition [Abstract]
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	The following table summarizes our contract assets and contract liabilities (in millions) : September 30, 2020 December 31, 2019 Contract assets (non-current) $ 1.2 $ 1.2 Contract liabilities (current) (1) $ 11.3 $ 8.8 Contract liabilities (non-current) (1) $ 166.9 $ 144.7 (1) During the three and nine months ended September 30, 2020, we recognized revenues of approximately $3.3 million and $10.2 million that were previously included in contract liabilities at December 31, 2019. The remaining change in contract liabilities during the three and nine months ended September 30, 2020, related to capital reimbursements associated with our revenue contracts and revenue deferrals associated with our contracts with increasing (decreasing) rates.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [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, 2020 (in millions) : Remainder of 2020 $ 25.7 2021 94.1 2022 59.6 2023 8.0 2024 3.3 Total $ 190.7
Disaggregation of Revenue	Disaggregation of Revenues The following tables summarize 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, 2020 and 2019 ( in millions ). We believe this summary best depicts how the nature, amount, timing and uncertainty of our revenues and cash flows are affected by economic factors. Three Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Topic 606 revenues Gathering Natural gas $ 30.3 $ — $ — $ — $ 30.3 Crude oil 22.5 — — — 22.5 Water 25.1 — — — 25.1 Processing Natural gas 6.1 — — — 6.1 Compression Natural gas 6.0 — — — 6.0 Storage Crude oil 0.1 0.8 — (0.3) 0.6 NGLs — — 3.4 — 3.4 Pipeline Crude oil — 1.7 — (0.6) 1.1 Transportation Crude oil 1.2 — — — 1.2 NGLs — — 3.1 — 3.1 Rail Loading Crude oil — 2.7 — (0.9) 1.8 Product Sales Natural gas 13.0 — 22.3 (12.9) 22.4 Crude oil 69.4 — 162.9 (15.6) 216.7 NGLs 16.4 — 145.6 (16.4) 145.6 Other — 0.2 0.3 (0.1) 0.4 Total Topic 606 revenues 190.1 5.4 337.6 (46.8) 486.3 Non-Topic 606 revenues (1) — — 32.9 — 32.9 Total revenues $ 190.1 $ 5.4 $ 370.5 $ (46.8) $ 519.2 (1) Represents revenues primarily related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Three Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Topic 606 revenues Gathering Natural gas $ 43.7 $ — $ — $ — $ 43.7 Crude oil 20.1 — — — 20.1 Water 21.3 — — — 21.3 Processing Natural gas 8.9 — — — 8.9 Compression Natural gas 6.4 — — — 6.4 Storage Crude oil 0.4 1.5 — (0.5) 1.4 NGLs — — 1.6 — 1.6 Pipeline Crude oil — 2.6 — (1.0) 1.6 Transportation Crude oil 2.2 — 1.4 (0.1) 3.5 NGLs — — 2.3 — 2.3 Rail Loading Crude oil — 2.4 — (1.2) 1.2 Product Sales Natural gas 10.3 — 13.8 (6.5) 17.6 Crude oil 170.0 — 383.6 (24.1) 529.5 NGLs 8.1 — 119.2 (2.8) 124.5 Other — 1.1 0.4 (0.9) 0.6 Total Topic 606 revenues 291.4 7.6 522.3 (37.1) 784.2 Non-Topic 606 revenues (1) — — 39.4 — 39.4 Total revenues $ 291.4 $ 7.6 $ 561.7 $ (37.1) $ 823.6 (1) Represents revenues primarily related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Nine Months Ended September 30, 2020 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Topic 606 revenues Gathering Natural gas $ 107.3 $ — $ — $ — $ 107.3 Crude oil 66.9 — — — 66.9 Water 66.4 — — — 66.4 Processing Natural gas 23.4 — — — 23.4 Compression Natural gas 18.0 — — — 18.0 Storage Crude oil 1.0 2.5 — (1.5) 2.0 NGLs — — 8.6 — 8.6 Pipeline Crude oil — 4.6 — (1.5) 3.1 NGLs — — 0.2 — 0.2 Transportation Crude oil 4.7 — 1.9 — 6.6 NGLs — — 7.4 — 7.4 Rail Loading Crude oil — 9.0 — (3.5) 5.5 Product Sales Natural gas 31.9 — 56.1 (31.4) 56.6 Crude oil 225.3 — 515.1 (39.0) 701.4 NGLs 28.9 — 398.3 (28.6) 398.6 Other — 0.9 1.0 (0.6) 1.3 Total Topic 606 revenues 573.8 17.0 988.6 (106.1) 1,473.3 Non-Topic 606 revenues (1) — — 126.5 — 126.5 Total revenues $ 573.8 $ 17.0 $ 1,115.1 $ (106.1) $ 1,599.8 (1) Represents revenues primarily related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities. Nine Months Ended September 30, 2019 Gathering and Processing Storage and Transportation Marketing, Supply and Logistics Intersegment Elimination Total Topic 606 revenues Gathering Natural gas $ 116.8 $ — $ — $ — $ 116.8 Crude oil 50.5 — — — 50.5 Water 57.1 — — — 57.1 Processing Natural gas 19.5 — — — 19.5 Compression Natural gas 18.6 — — — 18.6 Storage Crude oil 1.4 4.4 — (1.7) 4.1 NGLs — — 4.2 — 4.2 Pipeline Crude oil — 5.8 — (2.2) 3.6 Transportation Crude oil 5.5 — 4.4 (0.1) 9.8 NGLs — — 8.5 — 8.5 Rail Loading Crude oil — 13.5 — (4.0) 9.5 Product Sales Natural gas 40.0 — 44.0 (17.9) 66.1 Crude oil 411.8 — 965.1 (83.4) 1,293.5 NGLs 30.4 — 474.6 (10.1) 494.9 Other — 3.4 0.7 (2.7) 1.4 Total Topic 606 revenues 751.6 27.1 1,501.5 (122.1) 2,158.1 Non-Topic 606 revenues (1) — — 184.1 — 184.1 Total revenues $ 751.6 $ 27.1 $ 1,685.6 $ (122.1) $ 2,342.2 (1) Represents revenues primarily related to our commodity-based derivatives. See Note 6 for additional information related to our price risk management activities.

Condensed Consolidating Finan_2

Condensed Consolidating Financial Information (Tables)	9 Months Ended
	Sep. 30, 2020
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheet	Crestwood Midstream Partners LP Condensed Consolidating Balance Sheet September 30, 2020 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Assets Current assets: Cash $ 0.3 $ — $ 13.4 $ — $ 13.7 Accounts receivable — 203.8 18.3 — 222.1 Inventory — 100.1 — — 100.1 Other current assets — 59.3 0.2 — 59.5 Total current assets 0.3 363.2 31.9 — 395.4 Property, plant and equipment, net — 2,323.3 776.2 — 3,099.5 Goodwill and intangible assets, net — 668.1 280.1 — 948.2 Operating lease right-of-use assets, net — 37.0 2.6 — 39.6 Investments in consolidated affiliates 4,437.6 — — (4,437.6) — Investments in unconsolidated affiliates — — 953.0 — 953.0 Other non-current assets — 2.6 0.5 — 3.1 Total assets $ 4,437.9 $ 3,394.2 $ 2,044.3 $ (4,437.6) $ 5,438.8 Liabilities and capital Current liabilities: Accounts payable $ — $ 136.2 $ 2.4 $ — $ 138.6 Other current liabilities 51.5 120.1 22.8 — 194.4 Total current liabilities 51.5 256.3 25.2 — 333.0 Long-term liabilities: Long-term debt, less current portion 2,548.9 — — — 2,548.9 Other long-term liabilities — 159.2 128.0 — 287.2 Deferred income taxes — 0.6 — — 0.6 Total liabilities 2,600.4 416.1 153.2 — 3,169.7 Interest of non-controlling partner in subsidiary — — 431.6 — 431.6 Partners’ capital 1,837.5 2,978.1 1,459.5 (4,437.6) 1,837.5 Total liabilities and capital $ 4,437.9 $ 3,394.2 $ 2,044.3 $ (4,437.6) $ 5,438.8 Crestwood Midstream Partners LP Condensed Consolidating Balance Sheet December 31, 2019 (in millions) Parent Guarantor Non- Eliminations Consolidated Assets Current assets: Cash $ 1.8 $ — $ 23.6 $ — $ 25.4 Accounts receivable — 229.1 12.8 — 241.9 Inventory — 53.7 — — 53.7 Other current assets — 54.6 0.2 — 54.8 Total current assets 1.8 337.4 36.6 — 375.8 Property, plant and equipment, net — 2,331.3 736.2 — 3,067.5 Goodwill and intangible assets, net — 650.7 373.4 — 1,024.1 Operating lease right-of-use assets, net — 51.0 2.8 — 53.8 Investments in consolidated affiliates 4,451.6 — — (4,451.6) — Investments in unconsolidated affiliates — — 980.4 — 980.4 Other non-current assets — 1.9 0.5 — 2.4 Total assets $ 4,453.4 $ 3,372.3 $ 2,129.9 $ (4,451.6) $ 5,504.0 Liabilities and capital Current liabilities: Accounts payable $ — $ 175.9 $ 10.7 $ — $ 186.6 Other current liabilities 25.8 123.9 17.6 — 167.3 Total current liabilities 25.8 299.8 28.3 — 353.9 Long-term liabilities: Long-term debt, less current portion 2,328.3 — — — 2,328.3 Other long-term liabilities — 174.8 120.8 — 295.6 Deferred income taxes — 0.7 — — 0.7 Total liabilities 2,354.1 475.3 149.1 — 2,978.5 Interest of non-controlling partner in subsidiary — — 426.2 — 426.2 Partners’ capital 2,099.3 2,897.0 1,554.6 (4,451.6) 2,099.3 Total liabilities and capital $ 4,453.4 $ 3,372.3 $ 2,129.9 $ (4,451.6) $ 5,504.0
Condensed Income Statement	Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended September 30, 2020 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Revenues $ — $ 506.6 $ 12.6 $ — $ 519.2 Costs of product/services sold — 358.7 — — 358.7 Operating expenses and other: Operations and maintenance — 26.1 4.9 — 31.0 General and administrative 10.4 8.1 — — 18.5 Depreciation, amortization and accretion — 49.7 14.5 — 64.2 (Gain) loss on long-lived assets, net — 22.2 (0.9) — 21.3 10.4 106.1 18.5 — 135.0 Operating income (loss) (10.4) 41.8 (5.9) — 25.5 Earnings from unconsolidated affiliates, net — — 10.5 — 10.5 Interest and debt expense, net (33.6) (0.1) — — (33.7) Equity in net income (loss) of subsidiaries 36.0 — — (36.0) — Net income (loss) (8.0) 41.7 4.6 (36.0) 2.3 Net income attributable to non-controlling partner in subsidiary — — 10.3 — 10.3 Net income (loss) attributable to Crestwood Midstream Partners LP $ (8.0) $ 41.7 $ (5.7) $ (36.0) $ (8.0) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Three Months Ended September 30, 2019 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Revenues $ — $ 801.1 $ 23.2 $ (0.7) $ 823.6 Costs of product/services sold — 657.4 0.7 (0.7) 657.4 Operating expenses: Operations and maintenance — 30.8 5.2 — 36.0 General and administrative 10.7 13.0 — — 23.7 Depreciation, amortization and accretion — 45.5 9.6 — 55.1 Loss on long-lived assets, net — 0.1 — — 0.1 10.7 89.4 14.8 — 114.9 Operating income (loss) (10.7) 54.3 7.7 — 51.3 Earnings from unconsolidated affiliates, net — — 10.4 — 10.4 Interest and debt expense, net (30.7) — 0.1 — (30.6) Equity in net income (loss) of subsidiaries 62.7 — — (62.7) — Income (loss) before income taxes 21.3 54.3 18.2 (62.7) 31.1 Benefit for income taxes — 0.1 — — 0.1 Net income (loss) 21.3 54.4 18.2 (62.7) 31.2 Net income attributable to non-controlling partner in subsidiary — — 9.9 — 9.9 Net income (loss) attributable to Crestwood Midstream Partners LP $ 21.3 $ 54.4 $ 8.3 $ (62.7) $ 21.3 Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Nine Months Ended September 30, 2020 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Revenues $ — $ 1,543.5 $ 56.3 $ — $ 1,599.8 Costs of product/services sold — 1,118.6 0.2 — 1,118.8 Operating expenses and other: Operations and maintenance — 84.4 15.8 — 100.2 General and administrative 43.1 17.3 — — 60.4 Depreciation, amortization and accretion — 147.8 40.6 — 188.4 Loss on long-lived assets, net — 25.2 0.9 — 26.1 Goodwill impairment — — 80.3 — 80.3 43.1 274.7 137.6 — 455.4 Operating income (loss) (43.1) 150.2 (81.5) — 25.6 Earnings from unconsolidated affiliates, net — — 24.4 — 24.4 Interest and debt expense, net (99.9) (0.4) — — (100.3) Equity in net income (loss) of subsidiaries 62.5 — — (62.5) — Income (loss) before income taxes (80.5) 149.8 (57.1) (62.5) (50.3) Benefit for income taxes — 0.2 — — 0.2 Net income (loss) (80.5) 150.0 (57.1) (62.5) (50.1) Net income attributable to non-controlling partner — — 30.4 — 30.4 Net income (loss) attributable to Crestwood Midstream Partners LP $ (80.5) $ 150.0 $ (87.5) $ (62.5) $ (80.5) Crestwood Midstream Partners LP Condensed Consolidating Statement of Operations Nine Months Ended September 30, 2019 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Revenues $ — $ 2,299.5 $ 43.4 $ (0.7) $ 2,342.2 Costs of product/services sold — 1,890.2 0.7 (0.7) 1,890.2 Operating expenses and other: Operations and maintenance — 86.9 12.4 — 99.3 General and administrative 39.1 41.5 — — 80.6 Depreciation, amortization and accretion — 131.9 19.3 — 151.2 Loss on long-lived assets, net — 2.1 — — 2.1 Gain on acquisition — — (209.4) — (209.4) 39.1 262.4 (177.7) — 123.8 Operating income (loss) (39.1) 146.9 220.4 — 328.2 Earnings from unconsolidated affiliates, net — — 21.0 — 21.0 Interest and debt income (expense), net (83.4) — 0.1 — (83.3) Equity in net income (loss) of subsidiaries 363.7 — — (363.7) — Income (loss) before income taxes 241.2 146.9 241.5 (363.7) 265.9 Provision for income taxes — (0.2) — — (0.2) Net income (loss) 241.2 146.7 241.5 (363.7) 265.7 Net income attributable to non-controlling partner in subsidiary — — 24.5 — 24.5 Net income (loss) attributable to Crestwood Midstream Partners LP $ 241.2 $ 146.7 $ 217.0 $ (363.7) $ 241.2
Condensed Cash Flow Statement	Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Nine Months Ended September 30, 2020 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Cash flows from operating activities $ (112.4) $ 314.3 $ 92.1 $ — $ 294.0 Cash flows from investing activities: Acquisition, net of cash acquired — (162.3) — — (162.3) Purchases of property, plant and equipment — (66.1) (92.7) — (158.8) Investment in unconsolidated affiliates — — (6.0) — (6.0) Capital distributions from unconsolidated affiliates — — 27.8 — 27.8 Capital distributions from consolidated affiliates 7.4 — — (7.4) — Other — 0.6 1.0 — 1.6 Net cash provided by (used in) investing activities 7.4 (227.8) (69.9) (7.4) (297.7) Cash flows from financing activities: Proceeds from the issuance of long-term debt 947.0 — — — 947.0 Payments on long-term debt (731.1) — — — (731.1) Payments on finance leases — (2.4) — — (2.4) Net proceeds from issuance of non-controlling interest — — 2.8 — 2.8 Distributions to partners (180.9) — (27.8) — (208.7) Distributions to parent — — (7.4) 7.4 — Taxes paid for unit-based compensation vesting — (15.6) — — (15.6) Change in intercompany balances 68.5 (68.5) — — — Net cash provided by (used in) financing activities 103.5 (86.5) (32.4) 7.4 (8.0) Net change in cash (1.5) — (10.2) — (11.7) Cash at beginning of period 1.8 — 23.6 — 25.4 Cash at end of period $ 0.3 $ — $ 13.4 $ — $ 13.7 Crestwood Midstream Partners LP Condensed Consolidating Statement of Cash Flows Nine Months Ended September 30, 2019 (in millions) (unaudited) Parent Guarantor Non- Eliminations Consolidated Cash flows from operating activities $ (100.2) $ 322.1 $ 59.1 $ — $ 281.0 Cash flows from investing activities: Acquisition, net of cash acquired — — (462.1) — (462.1) Purchases of property, plant and equipment — (209.6) (137.4) — (347.0) Investment in unconsolidated affiliates — — (52.3) — (52.3) Capital distributions from unconsolidated affiliates — — 27.3 — 27.3 Capital contributions to consolidated affiliates (239.6) — — 239.6 — Other — (0.4) — — (0.4) Net cash provided by (used in) investing activities (239.6) (210.0) (624.5) 239.6 (834.5) Cash flows from financing activities: Proceeds from the issuance of long-term debt 1,993.7 — — — 1,993.7 Payments on long-term debt (1,474.3) (0.9) — — (1,475.2) Payments on finance leases — (2.6) — — (2.6) Payments for debt-related deferred costs (9.0) — — — (9.0) Net proceeds from the issuance of non-controlling interest — — 235.0 — 235.0 Distributions to partners (177.3) — (15.8) — (193.1) Contributions from parent — — 239.6 (239.6) — Taxes paid for unit-based compensation vesting — (10.9) — — (10.9) Change in intercompany balances (9.3) (97.7) 107.0 — — Net cash provided by (used in) financing activities 323.8 (112.1) 565.8 (239.6) 537.9 Net change in cash (16.0) — 0.4 — (15.6) Cash at beginning of period 16.5 — — — 16.5 Cash at end of period $ 0.5 $ — $ 0.4 $ — $ 0.9

Basis of Presentation and Sum_4

Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	Jan. 01, 2020	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 218.9		$ 218.9		$ 218.9
Goodwill impairment		$ 0		$ 0	80.3	$ 0
Goodwill, ending balance		138.6			138.6
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Investments in unconsolidated affiliates		$ 953			$ 953		$ 980.4
Crestwood Permian Basin Holdings LLC
Goodwill [Roll Forward]
Ownership percentage	50.00%	50.00%			50.00%
Investments in unconsolidated affiliates		$ 113.4			$ 113.4		$ 121.8
Arrow
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 45.9		45.9		45.9
Goodwill impairment					0
Goodwill, ending balance		45.9			45.9
Powder River Basin
Goodwill [Roll Forward]
Goodwill, beginning balance	80.3		80.3		80.3
Goodwill impairment			80.3		80.3
Goodwill, ending balance		0			0
NGL Marketing and Logistics
Goodwill [Roll Forward]
Goodwill, beginning balance	92.7		$ 92.7		92.7
Goodwill impairment					0
Goodwill, ending balance		$ 92.7			$ 92.7
Cumulative Effect, Period of Adoption, Adjustment
Goodwill [Roll Forward]
Allowance for doubtful accounts	0.7
Partners' capital	0.7
Cumulative Effect, Period of Adoption, Adjustment | Crestwood Permian Basin Holdings LLC
Goodwill [Roll Forward]
Partners' capital	(0.2)
Investments in unconsolidated affiliates	$ 0.2

Acquisitions and Divestitures (

Acquisitions and Divestitures (Details) $ in Millions	Oct. 01, 2020USD ($)	Apr. 09, 2019USD ($)	Apr. 30, 2020USD ($)TerminalsMMBbls	Apr. 30, 2019USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Business Acquisition [Line Items]
Net proceeds from issuance of non-controlling interest							$ 2.8	$ 235
Gain on acquisition					$ 0	$ 0	0	209.4
Assets held for sale					23.1		23.1		$ 0
Gain (loss) on long-lived assets					$ (21.3)	$ (0.1)	$ (26.1)	$ (2.1)
Fayetteville | Subsequent Event
Business Acquisition [Line Items]
Assets held for sale	$ 23
Gain (loss) on long-lived assets	$ 19.9
Crestwood Niobrara LLC
Business Acquisition [Line Items]
Net proceeds from issuance of non-controlling interest				$ 235
Percentage of voting rights acquired		100.00%
Crestwood Niobrara LLC | Williams Partners LP
Business Acquisition [Line Items]
Additional voting rights acquired		50.00%
Percentage of voting rights acquired		100.00%
Jackalope Gas Gathering Services, L.L.C.
Business Acquisition [Line Items]
Ownership percentage				50.00%		50.00%		50.00%
Plains All American Pipeline, L.P.
Business Acquisition [Line Items]
Consideration transferred			$ 162
NGL Storage Capacity | MMBbls			7
Liquid Petroleum Gas Terminals | Terminals			7
Property plant and equipment			$ 110
Intangible assets acquired			50
Assets and liabilities, net			$ 2
Jackalope Gas Gathering Services, L.L.C.
Business Acquisition [Line Items]
Consideration transferred		$ 484.6

Certain Balance Sheet Informa_3

Certain Balance Sheet Information (Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Accrued Expenses and Other Liabilities [Line Items]
Accrued expenses	$ 36.6	$ 61.6
Accrued property taxes	8	6.1
Income tax payable	0.2	0.3
Interest payable	51.3	25.6
Accrued additions to property, plant and equipment	10.6	38
Contingent consideration	19	0
Operating leases	16.5	18.1
Finance leases	3	3.2
Deferred revenue	11.3	8.8
Total accrued expenses and other liabilities	156.5	161.7
Contract liabilities	166.9	144.7
Contingent consideration	38	57
Operating leases	29.6	41.5
Asset retirement obligations	33.7	33.3
Other long-term liabilities	289.1	301.6
Other
Accrued Expenses and Other Liabilities [Line Items]
Other long-term liabilities	20.9	25.1
Crestwood Midstream Partners LP
Accrued Expenses and Other Liabilities [Line Items]
Accrued expenses	34.9	60.3
Accrued property taxes	8	6.1
Income tax payable	0.2	0.3
Interest payable	51.3	25.6
Accrued additions to property, plant and equipment	10.6	38
Contingent consideration	19	0
Operating leases	16.5	18.1
Finance leases	3	3.2
Deferred revenue	11.3	8.8
Total accrued expenses and other liabilities	154.8	160.4
Contract liabilities	166.9	144.7
Contingent consideration	38	57
Operating leases	29.6	41.5
Asset retirement obligations	33.7	33.3
Other long-term liabilities	287.2	295.6
Crestwood Midstream Partners LP | Other
Accrued Expenses and Other Liabilities [Line Items]
Other long-term liabilities	$ 19	$ 19.1

Investments in Unconsolidated_3

Investments in Unconsolidated Affiliates (Net Investments In and Earnings (Loss) from Unconsolidated Affiliates) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jan. 01, 2020	Dec. 31, 2019	Apr. 30, 2019	Apr. 09, 2019
Schedule of Equity Method Investments [Line Items]
Investment	$ 953			$ 953			$ 980.4
Earnings from unconsolidated affiliates, net	10.5		$ 10.4	24.4	$ 21
Crestwood Niobrara LLC
Schedule of Equity Method Investments [Line Items]
Percentage of voting rights acquired									100.00%
Crestwood Niobrara LLC | Williams Partners LP
Schedule of Equity Method Investments [Line Items]
Additional voting rights acquired									50.00%
Percentage of voting rights acquired									100.00%
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Investment	798.2			798.2			814.4
Earnings from unconsolidated affiliates, net	9.9		10.5	28.3	23.9
Difference between carrying amount and underlying equity	$ 51.3			$ 51.3
Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%			50.00%		50.00%
Investment	$ 113.4			$ 113.4			121.8
Earnings from unconsolidated affiliates, net	0.5		(0.5)	0.3	(7.2)
Difference between carrying amount and underlying equity	9.3			9.3
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investment	37.7			37.7			35.9
Earnings from unconsolidated affiliates, net	0.1		0.5	0.2	0.8
Difference between carrying amount and underlying equity	23.1			23.1
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Investment	3.7			3.7			8.3
Earnings from unconsolidated affiliates, net	0	$ (4.5)	$ (0.1)	(4.4)	$ (0.2)
Difference between carrying amount and underlying equity		$ 5.5
Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
Ownership percentage			50.00%		50.00%			50.00%
Investment	0			0			$ 0
Earnings from unconsolidated affiliates, net	$ 0		$ 0	$ 0	$ 3.7

Investments in Unconsolidated_4

Investments in Unconsolidated Affiliates (Summarized Financial Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Apr. 09, 2019
Schedule of Equity Method Investments [Line Items]
Operating Revenues	$ 519.2	$ 823.6	$ 1,599.8	$ 2,342.2
Operating Expenses	132.7	112.5	448.5	117
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 4.6	$ 33.6	(43.1)	272.7
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Amortization			0.9	0.9
Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
Amortization				0.1
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Amortization				0.3
Crestwood Niobrara LLC | Williams Partners LP
Schedule of Equity Method Investments [Line Items]
Additional voting rights acquired					50.00%
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Operating Revenues			206.5	205.1
Operating Expenses			171.9	153.2
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			35.5	51.1
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Operating Revenues			115.3	120.8
Operating Expenses			58.9	61.1
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			56.5	60
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Other Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Operating Revenues			91.2	84.3
Operating Expenses			113	92.1
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			$ (21)	$ (8.9)

Investments in Unconsolidated_5

Investments in Unconsolidated Affiliates (Distributions and Contributions) (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Oct. 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		$ 57.6	$ 55.2
Payments to acquire equity method investments		6	52.3
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		44.5	37.2
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		0	11.6
Payments to acquire equity method investments		0	24.4
Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		8.5	2.9
Payments to acquire equity method investments		0	21.4
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		4.4	3.5
Payments to acquire equity method investments		6	6.3
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		0.2	0
Payments to acquire equity method investments		$ 0	$ 0.2
Subsequent Event | Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments	$ 15.3
Subsequent Event | Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments	3.4
Subsequent Event | Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments	$ 2

Investments in Unconsolidated_6

Investments in Unconsolidated Affiliates (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jan. 01, 2020	Dec. 31, 2019	Apr. 30, 2019
Schedule of Equity Method Investments [Line Items]
Contingent consideration	$ 19			$ 0
Contingent consideration	38			57
Purchases of property, plant and equipment	158.8	$ 347
Jackalope Gas Gathering Services, L.L.C.
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]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 10
Ownership percentage	50.00%		50.00%
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Business Combination, Contingent Consideration, Liability	$ 57
Contingent consideration	$ 38
Crestwood Equity Partners LP | Crestwood Permian Basin Holdings
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%
Crestwood Midstream Partners LP
Schedule of Equity Method Investments [Line Items]
Contingent consideration	$ 19			0
Contingent consideration	38			$ 57
Purchases of property, plant and equipment	$ 158.8	$ 347

Risk Management (Risk Managemen

Risk Management (Risk Management Activities) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Product revenues	$ 32.4	$ 39.1	$ 125.4	$ 183.4
Commodity contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments not designated as hedging	$ (1.8)	$ 14.9	$ 27	$ 21.9

Risk Management (Notional Amoun

Risk Management (Notional Amounts and Terms of Company's Derivative Financial Instruments) (Details) bcf in Millions, MMBbls in Millions	Sep. 30, 2020MMBblsbcf	Dec. 31, 2019bcfMMBbls
Propane, ethane, butane, heating oil and crude oil (MMBbls) | Fixed Price Payor
Derivative [Line Items]
Derivative, notional amount | MMBbls	73.5	33.5
Propane, ethane, butane, heating oil and crude oil (MMBbls) | Fixed Price Receiver
Derivative [Line Items]
Derivative, notional amount | MMBbls	78.8	36.6
Natural gas (Bcf) | Fixed Price Payor
Derivative [Line Items]
Derivative, notional amount | bcf	18.8	3.7
Natural gas (Bcf) | Fixed Price Receiver
Derivative [Line Items]
Derivative, notional amount | bcf	26.1	8.7

Risk Management (Schedule of De

Risk Management (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Collateral posted for commodity derivative instruments	$ 17.9	$ 16.9
Commodity contract
Derivative [Line Items]
Collateral posted for commodity derivative instruments	0.9	0.1
NYMEX Derivative Liability
Derivative [Line Items]
Derivative Asset	16.1
Derivative Liability		(28.8)
NYMEX Margin Deposit
Derivative [Line Items]
NYMEX margin deposits	1.5	40.4
Commodity contract with credit contingent features
Derivative [Line Items]
Aggregate fair value of commodity derivative instruments	$ 21	$ 1.6

Risk Management (Narrative) (De

Risk Management (Narrative) (Details) - Price Risk Contracts Member - Maximum	9 Months Ended
	Sep. 30, 2020
Derivative [Line Items]
Remaining maturity	36 months
Percent of contracts expiring in the next twelve months	83.00%

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, 2020	Dec. 31, 2019
2023 Senior Notes
Debt Instrument [Line Items]
Carrying Amount	$ 689.5	$ 695.1
Fair Value	677.9	714
2025 Senior Notes
Debt Instrument [Line Items]
Carrying Amount	495.2	494.4
Fair Value	458.2	514.4
2027 Senior Notes
Debt Instrument [Line Items]
Carrying Amount	592.9	592.1
Fair Value	$ 536.3	$ 610.1

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, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	$ 203	$ 167.7
SPH units	2.3	3.1
Assets, Fair Value Disclosure, Excluding Netting Adjustments	205.3	170.8
Netting agreements	(170.4)	(122.3)
Assets, Collateral/Margin Received or Paid	(5)	(2.2)
Assets from price risk management, total	27.6	43.2
Total assets at fair value	29.9	46.3
Liabilities from price risk management	198.4	154.7
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	198.4	154.7
Netting agreements	(170.4)	(122.3)
Liabilities, Collateral/Margin Received or Paid	11.4	25.7
Liabilities from price risk management, total	39.4	6.7
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	15	3.7
SPH units	2.3	3.1
Assets, Fair Value Disclosure, Excluding Netting Adjustments	17.3	6.8
Liabilities from price risk management	17.9	2.8
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	17.9	2.8
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	188	164
SPH units	0	0
Assets, Fair Value Disclosure, Excluding Netting Adjustments	188	164
Liabilities from price risk management	180.5	151.9
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	180.5	151.9
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 ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Apr. 30, 2019
Debt Instrument [Line Items]
Less: deferred financing costs, net	$ 24.3	$ 29.1
Total debt	2,549.1	2,328.5
Less: current portion	0.2	0.2
Total long-term debt, less current portion	2,548.9	2,328.3
Senior Notes | 2023 Senior Notes
Debt Instrument [Line Items]
Senior notes	693.2	700
Senior Notes | 2025 Senior Notes
Debt Instrument [Line Items]
Senior notes	500	500
Senior Notes | 2027 Senior Notes
Debt Instrument [Line Items]
Senior notes	600	600	$ 600
Other
Debt Instrument [Line Items]
Other	0.4	0.6
Revolving Credit Facility | Crestwood Midstream Revolver
Debt Instrument [Line Items]
Credit Facility	$ 779.8	$ 557

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details) $ in Millions	1 Months Ended			9 Months Ended
	Sep. 30, 2020USD ($)	Apr. 30, 2020USD ($)	Apr. 30, 2019USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019
Debt Instrument [Line Items]
Senior Secured Leverage Ratio, maximum	3.75			3.75
Senior Secured Leverage Ratio	1.25			1.25
2027 Senior Notes
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		$ 591.1
Crestwood Midstream Revolver
Debt Instrument [Line Items]
Consolidated Leverage Ratio Maximum				5.50
Crestwood Midstream Revolver | Revolving Credit Facility
Debt Instrument [Line Items]
Available capacity	$ 446.3			$ 446.3
Letters of credit outstanding	$ 23.9			$ 23.9	$ 31.7
Debt, Weighted Average Interest Rate	2.43%			2.43%	4.00%
Interest Coverage Ratio Minimum				2.50
Total Funded Debt to Consolidated Ebitda				4.13
Consolidated Ebitda To Consolidated Interest Expense				4.65
Line of Credit Facility, Increase (Decrease), Net			$ 250
Crestwood Midstream Revolver | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	2.40%			2.40%	3.96%
Crestwood Midstream Revolver | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.50%			4.50%	6.00%
2023 Senior Notes
Debt Instrument [Line Items]
Repayments of Senior Debt	$ 6.7
Extinguishment of Debt, Amount	6.8
Senior Notes | 2027 Senior Notes
Debt Instrument [Line Items]
Senior notes	600		$ 600	$ 600	$ 600
Debt Instrument, Interest Rate, Stated Percentage			5.625%
Senior Notes | 2025 Senior Notes
Debt Instrument [Line Items]
Senior notes	500			500	500
Senior Notes | 2023 Senior Notes
Debt Instrument [Line Items]
Senior notes	$ 693.2			$ 693.2	$ 700
Jackalope Gas Gathering Services, L.L.C.
Debt Instrument [Line Items]
Ownership percentage			50.00%			50.00%

Earnings Per Limited Partner _3

Earnings Per Limited Partner Unit (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Allocated to Limited Partners	$ (20.7)	$ 8.6	$ (118.5)	$ 202
Net income attributable to preferred unit holders	15	15	45	45
Subordinated unitholders’ interest in net income	0	0.1	0	1.2
Net Income (Loss) Available to Common Stockholders, Diluted	$ (20.7)	$ 8.7	$ (118.5)	$ 203.2
Basic (units)	73.4	71.8	73.1	71.8
Dilutive units (units)	0	3.7	0	4.6
Weighted Average Limited Partnership Units Outstanding, Diluted	73.4	75.5	73.1	76.4
Basic (in dollars per share)	$ (0.28)	$ 0.12	$ (1.62)	$ 2.81
Diluted (in dollars per share)	$ (0.28)	$ 0.12	$ (1.62)	$ 2.66
Preferred Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	7.1	7.1	7.1	7.1
Niobrara Preferred Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive units (units)	0	3	0	3.9
Performance Shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.2	0	0.3	0
Dilutive units (units)	0	0.3	0	0.3
Subordinated Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.4	0	0.4	0
Dilutive units (units)	0	0.4	0	0.4
Crestwood Niobrara LLC | Preferred Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	8.7	0	8.7	0

Partners' Capital (Schedule of

Partners' Capital (Schedule of Partners' Capital Account, Distributions) (Details) - USD ($) $ / shares in Units, $ in Millions

Aug. 14, 2020

Aug. 07, 2020

May 15, 2020

May 08, 2020

Feb. 14, 2020

Feb. 07, 2020

Aug. 14, 2019

Aug. 07, 2019

May 15, 2019

May 08, 2019

Feb. 14, 2019

Feb. 07, 2019

Sep. 30, 2020

Sep. 30, 2019

Distribution Made to Limited Partner [Line Items]

Distribution Made to Limited Partner, Date of Record

Aug. 7, 2020

May 8, 2020

Feb. 7, 2020

Aug. 7, 2019

May 8, 2019

Feb. 7, 2019

Distribution Made to Limited Partner, Distribution Date

Aug. 14, 2020

May 15, 2020

Feb. 14, 2020

Aug. 14, 2019

May 15, 2019

Feb. 14, 2019

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

$ 0.625

$ 0.625

$ 0.625

$ 0.60

$ 0.60

$ 0.60

Distribution Made to Limited Partner, Cash Distributions Paid

$ 45.7

$ 45.7

$ 45.3

$ 43.1

$ 43.1

$ 43.1

$ 136.7

$ 129.3

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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Distribution Made to Limited Partner [Line Items]
Distributions to non-controlling partner			$ 27.8	$ 15.8
Net income attributable to non-controlling partners in subsidiaries	$ (10.3)	$ (9.9)	(30.4)	(24.5)
Crestwood Midstream Partners LP
Distribution Made to Limited Partner [Line Items]
Distributions to non-controlling partner			27.8	15.8
Net income attributable to non-controlling partners in subsidiaries	$ (10.3)	$ (9.9)	(30.4)	(24.5)
Crestwood Niobrara LLC
Distribution Made to Limited Partner [Line Items]
Distributions to non-controlling partner			$ 27.8	$ 15.8

Partners' Capital (Narrative) (

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

Nov. 13, 2020

Nov. 06, 2020

Oct. 15, 2020

Aug. 14, 2020

Aug. 07, 2020

May 15, 2020

May 08, 2020

Feb. 14, 2020

Feb. 07, 2020

Aug. 14, 2019

Aug. 07, 2019

May 15, 2019

May 08, 2019

Feb. 14, 2019

Feb. 07, 2019

Oct. 31, 2020

Feb. 29, 2020

Apr. 30, 2019

Sep. 30, 2020

Sep. 30, 2020

Sep. 30, 2019

Apr. 09, 2019

Distribution Made to Limited Partner [Line Items]

Equity Offering Program Authorized Amount

$ 250

Distribution Made to Limited Partner, Distribution Date

Aug. 14, 2020

May 15, 2020

Feb. 14, 2020

Aug. 14, 2019

May 15, 2019

Feb. 14, 2019

Distribution Made to Limited Partner, Date of Record

Aug. 7, 2020

May 8, 2020

Feb. 7, 2020

Aug. 7, 2019

May 8, 2019

Feb. 7, 2019

Distributions to preferred unitholders

45

$ 45

Incentive Distribution, Distribution

136.7

129.3

Distributions to non-controlling partner

27.8

15.8

Distribution Made to Limited Partner, Cash Distributions Paid

$ 45.7

$ 45.7

$ 45.3

$ 43.1

$ 43.1

$ 43.1

136.7

129.3

Net proceeds from issuance of non-controlling interest

2.8

235

Crestwood Midstream Partners LP

Distribution Made to Limited Partner [Line Items]

Incentive Distribution, Distribution

180.9

177.3

Distributions to non-controlling partner

27.8

15.8

Distribution Made to General Partner, Cash Distributions Paid

180.9

177.3

Net proceeds from issuance of non-controlling interest

2.8

235

Crestwood Niobrara LLC

Distribution Made to Limited Partner [Line Items]

Distributions to non-controlling partner

$ 27.8

15.8

Net proceeds from issuance of non-controlling interest

$ 235

Performance Shares

Distribution Made to Limited Partner [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period

184,528

405,620

Share-based Payment Arrangement, Noncash Expense

$ 0.3

$ 1.1

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

3 years

Common Units

Distribution Made to Limited Partner [Line Items]

Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period

838,556

Subsequent Event

Distribution Made to Limited Partner [Line Items]

Distribution Made to Limited Partner, Distribution Date

Nov. 13, 2020

Distribution Made to Limited Partner, Date of Record

Nov. 6, 2020

Distributions to preferred unitholders

$ 15

Subsequent Event | Crestwood Niobrara LLC

Distribution Made to Limited Partner [Line Items]

Distributions to non-controlling partner

$ 9.3

Cash Distribution | Subsequent Event

Distribution Made to Limited Partner [Line Items]

Distribution Made to Limited Partner, Distributions Declared, Per Unit

$ 0.625

Crestwood LTIP

Distribution Made to Limited Partner [Line Items]

Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount

$ 3.1

$ 3.1

Williams Partners LP | Crestwood Niobrara LLC

Distribution Made to Limited Partner [Line Items]

Additional voting rights acquired

50.00%

Series A-3

Distribution Made to Limited Partner [Line Items]

Net proceeds from issuance of non-controlling interest

$ 235

$ 235

Non-Controlling Partners

Distribution Made to Limited Partner [Line Items]

Net proceeds from issuance of non-controlling interest

$ 2.8

Partners' Capital Rollforward o

Partners' Capital Rollforward of non-controlling interest (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			9 Months Ended
	Apr. 30, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Temporary Equity [Roll Forward]
Temporary Equity, Net Income					$ 30.4	$ 20.5
Interest of non-controlling partner in subsidiary		$ 425.1			431.6	425.1	$ 426.2	$ 0
Non-controlling interest reclassification (Note 10)						178.8
Net proceeds from issuance of non-controlling interest					2.8	235
Crestwood Niobrara LLC
Increase (Decrease) in Temporary Equity [Roll Forward]
Net proceeds from issuance of non-controlling interest	$ 235
Non-Controlling Partners
Increase (Decrease) in Temporary Equity [Roll Forward]
Partners' Capital Account, Distributions		$ 0	$ (3.3)	$ (3.3)
Non-controlling interest reclassification (Note 10)			$ (178.8)
Non-Controlling Partners
Increase (Decrease) in Temporary Equity [Roll Forward]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders					(27.8)	(9.2)
Net proceeds from issuance of non-controlling interest					$ 2.8
Series A-3
Increase (Decrease) in Temporary Equity [Roll Forward]
Net proceeds from issuance of non-controlling interest	$ 235					$ 235

Commitments and Contingencies_2

Commitments and Contingencies (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Loss Contingency, Damages Sought, Value	$ 55
Loss Contingency Accrual, at Carrying Value	10.5	$ 10.7
Crestwood Midstream Partners LP
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Self Insurance Reserve	8.4	$ 8.3
Self Insurance Reserve Expected To Be Paid Subsequent To Next Fiscal Year	$ 5.2

Commitments and Contingencies_3

Commitments and Contingencies (Environmental Compliance) (Details) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2019Release	Mar. 31, 2015Release	Sep. 30, 2020USD ($)miles	Dec. 31, 2019USD ($)bbl	Sep. 15, 2015USD ($)	May 31, 2015bbl	Dec. 31, 2014bbl
Site Contingency [Line Items]
Miles of Water Gathering Pipeline Removed | miles			30
Fort Berthold Indian Reservation
Site Contingency [Line Items]
Site Contingency, Loss Exposure, Number of Releases of Produced Water | Release	2	3
Site Contingency, Loss Exposure, Release of Produced Water | bbl				5,000		5,200	28,000
Accrual for Environmental Loss Contingencies			$ 3.6	$ 6.7
Maximum
Site Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss					$ 1.1
Maximum | Fort Berthold Indian Reservation
Site Contingency [Line Items]
Site Contingency, Loss Exposure in Excess of Accrual, Best Estimate			$ 4.8

Commitments and Contingencies_4

Commitments and Contingencies (Self Insurance) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Crestwood Equity Partners LP
Other Commitments [Line Items]
Self Insurance Reserve	$ 9.4	$ 9.7
Self Insurance Reserve Expected To Be Paid Subsequent To Next Fiscal Year	6.2
Crestwood Midstream Partners LP
Other Commitments [Line Items]
Self Insurance Reserve	8.4	$ 8.3
Self Insurance Reserve Expected To Be Paid Subsequent To Next Fiscal Year	$ 5.2

Commitments and Contingencies_5

Commitments and Contingencies (Leases) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use assets, net	$ 39.6		$ 39.6		$ 53.8
Accrued expenses and other liabilities	156.5		156.5		161.7
Operating leases	29.6		29.6		41.5
Property, plant and equipment	3,750.9		3,750.9		3,612.5
Less: accumulated depreciation	799.2		799.2		703.4
Property, plant and equipment, net	2,951.7		2,951.7		2,909.1
Other long-term liabilities	289.1		289.1		301.6
Operating Lease, Expense	5.8	$ 6.2	20.4	$ 20.8
Finance Lease Expense	0.9	$ 1	3.1	$ 3.2
Operating Leases
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use assets, net	39.6		39.6		53.8
Accrued expenses and other liabilities	16.5		16.5		18.1
Operating leases	29.6		29.6		41.5
Operating lease, liability	46.1		46.1		59.6
Finance Lease
Lessee, Lease, Description [Line Items]
Accrued expenses and other liabilities	3		3		3.2
Property, plant and equipment	13.5		13.5		14.9
Less: accumulated depreciation	7.2		7.2		5.4
Property, plant and equipment, net	6.3		6.3		9.5
Other long-term liabilities	2.7		2.7		5.2
Finance Lease, Liability	$ 5.7		$ 5.7		$ 8.4

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Purchases of property, plant and equipment			$ 158.8	$ 347
Operations and maintenance expenses charged by CEQP and CMLP	$ 5	$ 6.3	16.7	19.7
Tres Palacios Holdings LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP	0.3		0.4
Applied Consultants, Inc.
Related Party Transaction [Line Items]
Purchases of property, plant and equipment			3.2	6.8
Ascent Resources - Utica, LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP	0.1	0.1	0.4	23.9
Stagecoach Gas Services LLC
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP				1.2
Costs of product/services sold at CEQP and CMLP		0.1		2.3
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	10.9	0.3	25.9	1.6
Costs of product/services sold at CEQP and CMLP	5.7	3.6	12.1	12.7
Affiliated Entity
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	10.9	0.3	25.9	2.8
Costs of product/services sold at CEQP and CMLP	6.1	3.8	12.9	39.1
General and administrative expenses charged by CEQP to CMLP, net	7.4	7.9	25.4	29
Related Party Transaction, Due from (to) Related Party [Abstract]
Related party receivables	20.1		20.1		$ 7.3
Related party payables	13.8		13.8		15.6
Blue Racer Midstream, LLC [Member]
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP				0.2
Crestwood Equity Partners LP
Related Party Transaction [Line Items]
General and administrative expenses at CEQP charged to (from) Crestwood Holdings, net	1.2	0.3	12.5	(5)
Crestwood Equity Partners LP | Affiliated Entity
Related Party Transaction [Line Items]
General and administrative expenses charged by CEQP to CMLP, net	0.9	0.7	1.3	1.1
Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Purchases of property, plant and equipment			158.8	347
Revenues at CEQP and CMLP	0.2	0	0.5	0
Crestwood Midstream Partners LP | Affiliated Entity
Related Party Transaction [Line Items]
General and administrative expenses charged by CEQP to CMLP, net	1	1	3.1	2.8
Related Party Transaction, Due from (to) Related Party [Abstract]
Related party payables	11.3		11.3		$ 13.1
Crestwood LTIP | Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Share-based Payment Arrangement, Expense	8.4	8.9	28.5	31.8
Crestwood LTIP | Crestwood Holdings
Related Party Transaction [Line Items]
Share-based Payment Arrangement, Expense	0.3	0.4	11.2	6.1
Stagecoach Gas Services LLC
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP	1.7	1.8	5	5.7
Tres Palacios Holdings LLC
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP	0.9	1.1	3.1	3.3
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP	$ 2.4	$ 3.4	$ 8.6	10.2
Jackalope Gas Gathering Services, L.L.C.
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP				$ 0.5

Segments (Reconciliation of Net

Segments (Reconciliation of Net Income (Loss) to EBITDA) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)segment	Sep. 30, 2019USD ($)
Segment Reporting, Other Significant Reconciling Item [Line Items]
Number of Operating Segments | segment			3
Net income (loss)	$ 4.6	$ 33.6	$ (43.1)	$ 272.7
Interest and debt expense, net	33.7	30.6	100.3	83.3
Provision (benefit) for income taxes	0	0	(0.1)	0.3
Depreciation, amortization and accretion	60.8	51.5	177.9	140.6
EBITDA	99.1	115.7	235	496.9
Crestwood Midstream Partners LP
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income (loss)	2.3	31.2	(50.1)	265.7
Interest and debt expense, net	33.7	30.6	100.3	83.3
Provision (benefit) for income taxes	0	(0.1)	(0.2)	0.2
Depreciation, amortization and accretion	64.2	55.1	188.4	151.2
EBITDA	$ 100.2	$ 116.8	$ 238.4	$ 500.4

Segments (Summary Of Segment In

Segments (Summary Of Segment Information) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)segment	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Net income (loss)	$ 4.6	$ 33.6	$ (43.1)	$ 272.7
Number of Operating Segments | segment			3
Depreciation, amortization and accretion	60.8	51.5	$ 177.9	140.6
Segment Reporting Information, Additional Information [Abstract]
Revenues	519.2	823.6	1,599.8	2,342.2
Costs of product/services sold	358.7	657.4	1,118.8	1,890.2
Operations and maintenance	31	36	100.2	99.3
General and administrative	19.6	24.9	64	84.4
Gain (loss) on long-lived assets	(21.3)	(0.1)	(26.1)	(2.1)
Goodwill impairment	0	0	(80.3)	0
Gain on acquisition	0	0	0	209.4
Earnings from unconsolidated affiliates, net	10.5	10.4	24.4	21
Other income, net		0.1	0.2	0.3
EBITDA	99.1	115.7	235	496.9
Goodwill	138.6		138.6		$ 218.9
Total assets	5,294.2		5,294.2		5,349.3
Marketing Supply and Logistics
Segment Reporting Information, Additional Information [Abstract]
Revenues				1,685.6
Crestwood Midstream Partners LP
Net income (loss)	2.3	31.2	(50.1)	265.7
Depreciation, amortization and accretion	64.2	55.1	188.4	151.2
Segment Reporting Information, Additional Information [Abstract]
Revenues	519.2	823.6	1,599.8	2,342.2
Costs of product/services sold	358.7	657.4	1,118.8	1,890.2
Operations and maintenance	31	36	100.2	99.3
General and administrative	18.5	23.7	60.4	80.6
Gain (loss) on long-lived assets	(21.3)	(0.1)	(26.1)	(2.1)
Goodwill impairment	0	0	(80.3)	0
Gain on acquisition	0	0	0	209.4
Earnings from unconsolidated affiliates, net	10.5	10.4	24.4	21
EBITDA	100.2	116.8	238.4	500.4
Goodwill	138.6		138.6		218.9
Total assets	5,438.8		5,438.8		$ 5,504
Intersegment Eliminations
Segment Reporting Information, Additional Information [Abstract]
Revenues	(46.8)	(37.1)	(106.1)	(122.1)
Intersegment Eliminations | Gathering and Processing Operations
Segment Reporting Information, Additional Information [Abstract]
Revenues	44.9	33.6	99.2	111.8
Intersegment Eliminations | Storage and Transportation
Segment Reporting Information, Additional Information [Abstract]
Revenues	1.9	3.5	6.9	10.3
Intersegment Eliminations | Marketing Supply and Logistics
Segment Reporting Information, Additional Information [Abstract]
Revenues	(46.8)	(37.1)	(106.1)	(122.1)
Intersegment Eliminations | Crestwood Midstream Partners LP | Gathering and Processing Operations
Segment Reporting Information, Additional Information [Abstract]
Revenues	44.9	33.6	99.2	111.8
Intersegment Eliminations | Crestwood Midstream Partners LP | Storage and Transportation
Segment Reporting Information, Additional Information [Abstract]
Revenues	1.9	3.5	6.9	10.3
Intersegment Eliminations | Crestwood Midstream Partners LP | Marketing Supply and Logistics
Segment Reporting Information, Additional Information [Abstract]
Revenues	(46.8)	(37.1)	(106.1)	(122.1)
Corporate and Eliminations [Member]
Segment Reporting Information, Additional Information [Abstract]
Revenues	0	0	0	0
Corporate and Eliminations [Member] | Crestwood Midstream Partners LP
Segment Reporting Information, Additional Information [Abstract]
Revenues	0	0	0	0
Operating Segments | Gathering and Processing Operations
Segment Reporting Information, Additional Information [Abstract]
Revenues	145.2	257.8	474.6	639.8
Costs of product/services sold	63.2	164.1	192.8	411
Operations and maintenance	19.4	27.5	65.7	70.2
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(19.1)	(0.1)	(23.7)	(2.1)
Goodwill impairment			(80.3)
Gain on acquisition				209.4
Earnings from unconsolidated affiliates, net	0.5	(0.5)	0.3	(3.5)
Other income, net		0	0	0
EBITDA	88.9	99.2	211.6	474.2
Goodwill	45.9		45.9
Total assets	3,544.2		3,544.2
Operating Segments | Storage and Transportation
Segment Reporting Information, Additional Information [Abstract]
Revenues	3.5	4.1	10.1	16.8
Costs of product/services sold	0	0.1	0.3	0.1
Operations and maintenance	0.7	1.1	2.8	3
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	0	0	0	0
Goodwill impairment			0
Gain on acquisition				0
Earnings from unconsolidated affiliates, net	10	10.9	24.1	24.5
Other income, net		0	0	0
EBITDA	14.7	17.3	38	48.5
Goodwill	0		0
Total assets	955.1		955.1
Operating Segments | Marketing Supply and Logistics
Segment Reporting Information, Additional Information [Abstract]
Revenues	370.5	561.7	1,115.1	1,685.6
Costs of product/services sold	295.5	493.2	925.7	1,479.1
Operations and maintenance	10.9	7.4	31.7	26.1
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(2.4)	0	(2.6)	(0.2)
Goodwill impairment			0
Gain on acquisition				0
Earnings from unconsolidated affiliates, net	0	0	0	0
Other income, net		0	0	0
EBITDA	14.9	24	49	58.1
Goodwill	92.7		92.7
Total assets	766.9		766.9
Operating Segments | Crestwood Midstream Partners LP | Gathering and Processing Operations
Segment Reporting Information, Additional Information [Abstract]
Revenues	145.2	257.8	474.6	639.8
Costs of product/services sold	63.2	164.1	192.8	411
Operations and maintenance	19.4	27.5	65.7	70.2
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(19.1)	(0.1)	(23.7)	(2.1)
Goodwill impairment			(80.3)
Gain on acquisition				209.4
Earnings from unconsolidated affiliates, net	0.5	(0.5)	0.3	(3.5)
EBITDA	88.9	99.2	211.6	474.2
Goodwill	45.9		45.9
Total assets	3,692.9		3,692.9
Operating Segments | Crestwood Midstream Partners LP | Storage and Transportation
Segment Reporting Information, Additional Information [Abstract]
Revenues	3.5	4.1	10.1	16.8
Costs of product/services sold	0	0.1	0.3	0.1
Operations and maintenance	0.7	1.1	2.8	3
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	0	0	0	0
Goodwill impairment			0
Gain on acquisition				0
Earnings from unconsolidated affiliates, net	10	10.9	24.1	24.5
EBITDA	14.7	17.3	38	48.5
Goodwill	0		0
Total assets	955.1		955.1
Operating Segments | Crestwood Midstream Partners LP | Marketing Supply and Logistics
Segment Reporting Information, Additional Information [Abstract]
Revenues	370.5	561.7	1,115.1	1,685.6
Costs of product/services sold	295.5	493.2	925.7	1,479.1
Operations and maintenance	10.9	7.4	31.7	26.1
General and administrative	0	0	0	0
Gain (loss) on long-lived assets	(2.4)	0	(2.6)	(0.2)
Goodwill impairment			0
Gain on acquisition				0
Earnings from unconsolidated affiliates, net	0	0	0	0
EBITDA	14.9	24	49	58.1
Goodwill	92.7		92.7
Total assets	766.9		766.9
Corporate, Non-Segment
Segment Reporting Information, Additional Information [Abstract]
Revenues	0	0	0	0
Costs of product/services sold	0	0	0	0
Operations and maintenance	0	0	0	0
General and administrative	19.6	24.9	64	84.4
Gain (loss) on long-lived assets	0.2	0	0.2	0.2
Goodwill impairment			0
Gain on acquisition				0
Earnings from unconsolidated affiliates, net	0	0	0	0
Other income, net		0.1	0.2	0.3
EBITDA	(19.4)	(24.8)	(63.6)	(83.9)
Goodwill	0		0
Total assets	28		28
Corporate, Non-Segment | Crestwood Midstream Partners LP
Segment Reporting Information, Additional Information [Abstract]
Revenues	0	0	0	0
Costs of product/services sold	0	0	0	0
Operations and maintenance	0	0	0	0
General and administrative	18.5	23.7	60.4	80.6
Gain (loss) on long-lived assets	0.2	0	0.2	0.2
Goodwill impairment			0
Gain on acquisition				0
Earnings from unconsolidated affiliates, net	0	0	0	0
EBITDA	(18.3)	$ (23.7)	(60.2)	$ (80.4)
Goodwill	0		0
Total assets	$ 23.9		$ 23.9

Segments (Narrative) (Details)

Segments (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Interest, taxes, depreciation and amortization included in earnings from equity method investments	$ 9.9	$ 9.7	$ 33.2	$ 32.7

Revenues (Narrative) (Details)

Revenues (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Revenue Recognition [Abstract]
ASC 606 accounts receivable	$ 194.4	$ 225

Revenues (Contract Assets and L

Revenues (Contract Assets and Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Contract Assets (Non-current)	$ 1.2	$ 1.2	$ 1.2
Contract Liabilities (Current)	11.3	11.3	8.8
Contract liabilities	166.9	166.9	$ 144.7
Contract with Customer, Liability, Revenue Recognized	$ 3.3	$ 10.2

Revenues (Disaggregation of Rev

Revenues (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 519.2	$ 823.6	$ 1,599.8	$ 2,342.2
Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue including intersegment eliminations	190.1	291.4	573.8	751.6
Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue including intersegment eliminations	5.4	7.6	17	27.1
Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenues				1,685.6
Revenue including intersegment eliminations	370.5	561.7	1,115.1
Natural Gas Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	30.3	43.7	107.3	116.8
Natural Gas Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	30.3	43.7	107.3	116.8
Natural Gas Gathering | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Natural Gas Gathering | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Crude Oil Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	22.5	20.1	66.9	50.5
Crude Oil Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	22.5	20.1	66.9	50.5
Crude Oil Gathering | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Crude Oil Gathering | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Water Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	25.1	21.3	66.4	57.1
Water Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	25.1	21.3	66.4	57.1
Water Gathering | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Water Gathering | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Natural Gas Processing
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6.1	8.9	23.4	19.5
Natural Gas Processing | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6.1	8.9	23.4	19.5
Natural Gas Processing | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Natural Gas Processing | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Natural Gas Compression
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6	6.4	18	18.6
Natural Gas Compression | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	6	6.4	18	18.6
Natural Gas Compression | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Natural Gas Compression | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Crude Oil Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.6	1.4	2	4.1
Crude Oil Storage | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.1	0.4	1	1.4
Crude Oil Storage | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.8	1.5	2.5	4.4
Crude Oil Storage | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
NGL Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3.4	1.6	8.6	4.2
NGL Storage | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
NGL Storage | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
NGL Storage | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3.4	1.6	8.6	4.2
Crude Oil Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.1	1.6	3.1	3.6
Crude Oil Pipeline | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Crude Oil Pipeline | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.7	2.6	4.6	5.8
Crude Oil Pipeline | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
NGL Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.2
NGL Pipeline | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0
NGL Pipeline | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0
NGL Pipeline | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.2
Crude Oil Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.2	3.5	6.6	9.8
Crude Oil Transportation | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.2	2.2	4.7	5.5
Crude Oil Transportation | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Crude Oil Transportation | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	1.4	1.9	4.4
NGL Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3.1	2.3	7.4	8.5
NGL Transportation | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
NGL Transportation | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
NGL Transportation | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3.1	2.3	7.4	8.5
Crude Oil Rail Loading
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.8	1.2	5.5	9.5
Crude Oil Rail Loading | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Crude Oil Rail Loading | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.7	2.4	9	13.5
Crude Oil Rail Loading | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Natural Gas Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	22.4	17.6	56.6	66.1
Natural Gas Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	13	10.3	31.9	40
Natural Gas Product Sales | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Natural Gas Product Sales | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	22.3	13.8	56.1	44
Crude Oil Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	216.7	529.5	701.4	1,293.5
Crude Oil Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	69.4	170	225.3	411.8
Crude Oil Product Sales | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Crude Oil Product Sales | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	162.9	383.6	515.1	965.1
NGL Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	145.6	124.5	398.6	494.9
NGL Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	16.4	8.1	28.9	30.4
NGL Product Sales | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
NGL Product Sales | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	145.6	119.2	398.3	474.6
Other revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.4	0.6	1.3	1.4
Other revenue | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Other revenue | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.2	1.1	0.9	3.4
Other revenue | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.3	0.4	1	0.7
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenues	(46.8)	(37.1)	(106.1)	(122.1)
Intersegment Eliminations | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenues	44.9	33.6	99.2	111.8
Intersegment Eliminations | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenues	1.9	3.5	6.9	10.3
Intersegment Eliminations | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenues	(46.8)	(37.1)	(106.1)	(122.1)
Intersegment Eliminations | Natural Gas Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Intersegment Eliminations | Crude Oil Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Intersegment Eliminations | Water Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Intersegment Eliminations | Natural Gas Processing
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Intersegment Eliminations | Natural Gas Compression
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Intersegment Eliminations | Crude Oil Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.3)	(0.5)	(1.5)	(1.7)
Intersegment Eliminations | NGL Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Intersegment Eliminations | Crude Oil Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.6)	(1)	(1.5)	(2.2)
Intersegment Eliminations | NGL Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0
Intersegment Eliminations | Crude Oil Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	(0.1)	0	(0.1)
Intersegment Eliminations | NGL Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Intersegment Eliminations | Crude Oil Rail Loading
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.9)	(1.2)	(3.5)	(4)
Intersegment Eliminations | Natural Gas Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(12.9)	(6.5)	(31.4)	(17.9)
Intersegment Eliminations | Crude Oil Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(15.6)	(24.1)	(39)	(83.4)
Intersegment Eliminations | NGL Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(16.4)	(2.8)	(28.6)	(10.1)
Intersegment Eliminations | Other revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.1)	(0.9)	(0.6)	(2.7)
Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	486.3	784.2	1,473.3	2,158.1
Revenue from Contract with Customer | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	190.1	291.4	573.8	751.6
Revenue from Contract with Customer | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5.4	7.6	17	27.1
Revenue from Contract with Customer | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	337.6	522.3	988.6	1,501.5
Revenue from Contract with Customer | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(46.8)	(37.1)	(106.1)	(122.1)
Product and Service, Other
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	32.9	39.4	126.5	184.1
Product and Service, Other | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	0	0	0	0
Product and Service, Other | Storage and Transportation
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	0	0	0	0
Product and Service, Other | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	32.9	39.4	126.5	184.1
Product and Service, Other | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	$ 0	$ 0	$ 0	$ 0

Revenues (Remaining Performance

Revenues (Remaining Performance Obligations) (Details) $ in Millions	Sep. 30, 2020USD ($)
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 190.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 25.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 94.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 59.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue Recognition [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 3.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	16 years

Condensed Consolidating Finan_3

Condensed Consolidating Financial Information (Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash	$ 14.5	$ 25.7
Accounts receivable	222.2	242.2
Inventory	100.1	53.7
Total current assets	396.3	376.4
Property, plant and equipment, net	2,951.7	2,909.1
Operating lease, right-of-use assets, net	39.6	53.8
Investment	953	980.4
Other non-current assets	5.4	5.5
Total assets	5,294.2	5,349.3
Current liabilities:
Accounts payable	141.1	189.2
Total current liabilities	337.2	357.8
Long-term liabilities:
Long-term debt, less current portion	2,548.9	2,328.3
Other long-term liabilities	289.1	301.6
Deferred income taxes	2.2	2.6
Total liabilities	3,177.4	2,990.3
Interest of non-controlling partner in subsidiary	431.6	426.2	$ 425.1	$ 0
Total partners’ capital	1,685.2	1,932.8
Total liabilities and capital	5,294.2	5,349.3
Eliminations
Current assets:
Cash	0	0
Accounts receivable	0	0
Inventory	0	0
Other	0	0
Total current assets	0	0
Property, plant and equipment, net	0	0
Operating lease, right-of-use assets, net	0	0
Goodwill and intangible assets, net	0	0
Investment in consolidated affiliates	(4,437.6)	(4,451.6)
Investment	0	0
Other non-current assets	0	0
Total assets	(4,437.6)	(4,451.6)
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
Total liabilities	0	0
Interest of non-controlling partner in subsidiary (Note 10)		0
Interest of non-controlling partner in subsidiary	0
Partners' capital	(4,437.6)	(4,451.6)
Total liabilities and capital	(4,437.6)	(4,451.6)
Parent Company, Crestwood Midstream Partners, LP | Reportable Legal Entities
Current assets:
Cash	0.3	1.8
Accounts receivable	0	0
Inventory	0	0
Other	0	0
Total current assets	0.3	1.8
Property, plant and equipment, net	0	0
Operating lease, right-of-use assets, net	0	0
Goodwill and intangible assets, net	0	0
Investment in consolidated affiliates	4,437.6	4,451.6
Investment	0	0
Other non-current assets	0	0
Total assets	4,437.9	4,453.4
Current liabilities:
Accounts payable	0	0
Other current liabilities	51.5	25.8
Total current liabilities	51.5	25.8
Long-term liabilities:
Long-term debt, less current portion	2,548.9	2,328.3
Other long-term liabilities	0	0
Deferred income taxes	0	0
Total liabilities	2,600.4	2,354.1
Interest of non-controlling partner in subsidiary (Note 10)		0
Interest of non-controlling partner in subsidiary	0
Partners' capital	1,837.5	2,099.3
Total liabilities and capital	4,437.9	4,453.4
Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash	0	0
Accounts receivable	203.8	229.1
Inventory	100.1	53.7
Other	59.3	54.6
Total current assets	363.2	337.4
Property, plant and equipment, net	2,323.3	2,331.3
Operating lease, right-of-use assets, net	37	51
Goodwill and intangible assets, net	668.1	650.7
Investment in consolidated affiliates	0	0
Investment	0	0
Other non-current assets	2.6	1.9
Total assets	3,394.2	3,372.3
Current liabilities:
Accounts payable	136.2	175.9
Other current liabilities	120.1	123.9
Total current liabilities	256.3	299.8
Long-term liabilities:
Long-term debt, less current portion	0	0
Other long-term liabilities	159.2	174.8
Deferred income taxes	0.6	0.7
Total liabilities	416.1	475.3
Interest of non-controlling partner in subsidiary (Note 10)		0
Interest of non-controlling partner in subsidiary	0
Partners' capital	2,978.1	2,897
Total liabilities and capital	3,394.2	3,372.3
Non-Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash	13.4	23.6
Accounts receivable	18.3	12.8
Inventory	0	0
Other	0.2	0.2
Total current assets	31.9	36.6
Property, plant and equipment, net	776.2	736.2
Operating lease, right-of-use assets, net	2.6	2.8
Goodwill and intangible assets, net	280.1	373.4
Investment in consolidated affiliates	0	0
Investment	953	980.4
Other non-current assets	0.5	0.5
Total assets	2,044.3	2,129.9
Current liabilities:
Accounts payable	2.4	10.7
Other current liabilities	22.8	17.6
Total current liabilities	25.2	28.3
Long-term liabilities:
Long-term debt, less current portion	0	0
Other long-term liabilities	128	120.8
Deferred income taxes	0	0
Total liabilities	153.2	149.1
Interest of non-controlling partner in subsidiary (Note 10)		426.2
Interest of non-controlling partner in subsidiary	431.6
Partners' capital	1,459.5	1,554.6
Total liabilities and capital	2,044.3	2,129.9
Crestwood Midstream Partners LP
Current assets:
Cash	13.7	25.4
Accounts receivable	222.1	241.9
Inventory	100.1	53.7
Other	59.5	54.8
Total current assets	395.4	375.8
Property, plant and equipment, net	3,099.5	3,067.5
Operating lease, right-of-use assets, net	39.6	53.8
Goodwill and intangible assets, net	948.2	1,024.1
Investment in consolidated affiliates	0	0
Investment	953	980.4
Other non-current assets	3.1	2.4
Total assets	5,438.8	5,504
Current liabilities:
Accounts payable	138.6	186.6
Other current liabilities	194.4	167.3
Total current liabilities	333	353.9
Long-term liabilities:
Long-term debt, less current portion	2,548.9	2,328.3
Other long-term liabilities	287.2	295.6
Deferred income taxes	0.6	0.7
Total liabilities	3,169.7	2,978.5
Interest of non-controlling partner in subsidiary (Note 10)		426.2
Interest of non-controlling partner in subsidiary	431.6
Partners' capital	1,837.5	2,099.3
Total liabilities and capital	$ 5,438.8	$ 5,504

Condensed Consolidating Finan_4

Condensed Consolidating Financial Information (Statements Of Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues	$ 519.2	$ 823.6	$ 1,599.8	$ 2,342.2
Costs of product/services sold	358.7	657.4	1,118.8	1,890.2
Operating expenses and other:
Operations and maintenance	31	36	100.2	99.3
General and administrative	19.6	24.9	64	84.4
Depreciation, amortization and accretion	60.8	51.5	177.9	140.6
Loss on long-lived assets, net	21.3	0.1	26.1	2.1
Gain on acquisition	0	0	0	(209.4)
Goodwill impairment	0	0	80.3	0
Total expenses	132.7	112.5	448.5	117
Operating income (loss)	27.8	53.7	32.5	335
Earnings from unconsolidated affiliates, net	10.5	10.4	24.4	21
Interest and debt expense, net	(33.7)	(30.6)	(100.3)	(83.3)
Income (loss) before income taxes	4.6	33.6	(43.2)	273
(Provision) benefit for income taxes	0	0	0.1	(0.3)
Net income (loss)	4.6	33.6	(43.1)	272.7
Net income attributable to non-controlling partner in subsidiary	10.3	9.9	30.4	24.5
Net income (loss) attributable to parent	(5.7)	23.7	(73.5)	248.2
Eliminations
Revenues	0	(0.7)	0	(0.7)
Costs of product/services sold	0	(0.7)	0	(0.7)
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
Gain on acquisition				0
Goodwill impairment			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 from unconsolidated affiliates	(36)	(62.7)	(62.5)	(363.7)
Income (loss) before income taxes		(62.7)	(62.5)	(363.7)
(Provision) benefit for income taxes		0	0	0
Net income (loss)	(36)	(62.7)	(62.5)	(363.7)
Net income attributable to non-controlling partner in subsidiary	0	0	0	0
Net income (loss) attributable to parent	(36)	(62.7)	(62.5)	(363.7)
Non-Guarantor Subsidiaries | Reportable Legal Entities
Revenues	12.6	23.2	56.3	43.4
Costs of product/services sold	0	0.7	0.2	0.7
Operating expenses and other:
Operations and maintenance	4.9	5.2	15.8	12.4
General and administrative	0	0	0	0
Depreciation, amortization and accretion	14.5	9.6	40.6	19.3
Loss on long-lived assets, net	(0.9)	0	0.9	0
Gain on acquisition				(209.4)
Goodwill impairment			80.3
Total expenses	18.5	14.8	137.6	(177.7)
Operating income (loss)	(5.9)	7.7	(81.5)	220.4
Earnings from unconsolidated affiliates, net	10.5	10.4	24.4	21
Interest and debt expense, net	0	0.1	0	0.1
Loss from unconsolidated affiliates	0	0	0	0
Income (loss) before income taxes		18.2	(57.1)	241.5
(Provision) benefit for income taxes		0	0	0
Net income (loss)	4.6	18.2	(57.1)	241.5
Net income attributable to non-controlling partner in subsidiary	10.3	9.9	30.4	24.5
Net income (loss) attributable to parent	(5.7)	8.3	(87.5)	217
Crestwood Midstream Partners LP
Revenues	519.2	823.6	1,599.8	2,342.2
Costs of product/services sold	358.7	657.4	1,118.8	1,890.2
Operating expenses and other:
Operations and maintenance	31	36	100.2	99.3
General and administrative	18.5	23.7	60.4	80.6
Depreciation, amortization and accretion	64.2	55.1	188.4	151.2
Loss on long-lived assets, net	21.3	0.1	26.1	2.1
Gain on acquisition				(209.4)
Goodwill impairment			80.3
Total expenses	135	114.9	455.4	123.8
Operating income (loss)	25.5	51.3	25.6	328.2
Earnings from unconsolidated affiliates, net	10.5	10.4	24.4	21
Interest and debt expense, net	(33.7)	(30.6)	(100.3)	(83.3)
Loss from unconsolidated affiliates	0	0	0	0
Income (loss) before income taxes		31.1	(50.3)	265.9
(Provision) benefit for income taxes		0.1	0.2	(0.2)
Net income (loss)	2.3	31.2	(50.1)	265.7
Net income attributable to non-controlling partner in subsidiary	10.3	9.9	30.4	24.5
Net income (loss) attributable to parent	(8)	21.3	(80.5)	241.2
Guarantor Subsidiaries | Reportable Legal Entities
Revenues	506.6	801.1	1,543.5	2,299.5
Costs of product/services sold	358.7	657.4	1,118.6	1,890.2
Operating expenses and other:
Operations and maintenance	26.1	30.8	84.4	86.9
General and administrative	8.1	13	17.3	41.5
Depreciation, amortization and accretion	49.7	45.5	147.8	131.9
Loss on long-lived assets, net	22.2	0.1	25.2	2.1
Gain on acquisition				0
Goodwill impairment			0
Total expenses	106.1	89.4	274.7	262.4
Operating income (loss)	41.8	54.3	150.2	146.9
Earnings from unconsolidated affiliates, net	0	0	0	0
Interest and debt expense, net	(0.1)	0	(0.4)	0
Loss from unconsolidated affiliates	0	0	0	0
Income (loss) before income taxes		54.3	149.8	146.9
(Provision) benefit for income taxes		0.1	0.2	(0.2)
Net income (loss)	41.7	54.4	150	146.7
Net income attributable to non-controlling partner in subsidiary	0	0	0	0
Net income (loss) attributable to parent	41.7	54.4	150	146.7
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	10.4	10.7	43.1	39.1
Depreciation, amortization and accretion	0	0	0	0
Loss on long-lived assets, net	0	0	0	0
Gain on acquisition				0
Goodwill impairment			0
Total expenses	10.4	10.7	43.1	39.1
Operating income (loss)	(10.4)	(10.7)	(43.1)	(39.1)
Earnings from unconsolidated affiliates, net	0	0	0	0
Interest and debt expense, net	(33.6)	(30.7)	(99.9)	(83.4)
Loss from unconsolidated affiliates	36	62.7	62.5	363.7
Income (loss) before income taxes		21.3	(80.5)	241.2
(Provision) benefit for income taxes		0	0	0
Net income (loss)	(8)	21.3	(80.5)	241.2
Net income attributable to non-controlling partner in subsidiary	0	0	0	0
Net income (loss) attributable to parent	$ (8)	$ 21.3	$ (80.5)	$ 241.2

Condensed Consolidating Finan_5

Condensed Consolidating Financial Information (Statements Of Cash Flows) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities	$ 295.3	$ 278.3
Cash flows from investing activities:
Acquisition, net of cash acquired	(162.3)	(462.1)
Purchases of property, plant and equipment	(158.8)	(347)
Investments in unconsolidated affiliates	(6)	(52.3)
Capital distributions from unconsolidated affiliates	27.8	27.3
Other	1.6	(0.4)
Net cash used in investing activities	(297.7)	(834.5)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	947	1,993.7
Payments on long-term debt	(731.1)	(1,475.2)
Payments on finance leases	(2.4)	(2.6)
Payments for debt-related deferred costs	0	(9)
Net proceeds from issuance of non-controlling interest	2.8	235
Distributions to partners	(136.7)	(129.3)
Taxes paid for unit-based compensation vesting	(15.6)	(10.9)
Net cash provided by (used in) financing activities	(8.8)	540.6
Net change in cash	(11.2)	(15.6)
Cash at beginning of period	25.7	17.2
Cash at end of period	14.5	1.6
Eliminations
Cash flows from operating activities	0	0
Cash flows from investing activities:
Acquisition, net of cash acquired	0	0
Purchases of property, plant and equipment	0	0
Investments in unconsolidated affiliates	0	0
Capital distributions from unconsolidated affiliates	0	0
Capital distributions from consolidated affiliates	(7.4)	239.6
Other	0	0
Net cash used in investing activities	(7.4)	239.6
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0	0
Payments on long-term debt	0	0
Payments on finance leases	0	0
Payments for debt-related deferred costs		0
Net proceeds from issuance of non-controlling interest	0	0
Distributions to partners	0	0
Contributions from (distributions to) parent	7.4	(239.6)
Taxes paid for unit-based compensation vesting	0	0
Change in intercompany balances	0	0
Net cash provided by (used in) financing activities	7.4	(239.6)
Net change in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	0	0
Non-Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities	92.1	59.1
Cash flows from investing activities:
Acquisition, net of cash acquired	0	(462.1)
Purchases of property, plant and equipment	(92.7)	(137.4)
Investments in unconsolidated affiliates	(6)	(52.3)
Capital distributions from unconsolidated affiliates	27.8	27.3
Capital distributions from consolidated affiliates	0	0
Other	1	0
Net cash used in investing activities	(69.9)	(624.5)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0	0
Payments on long-term debt	0	0
Payments on finance leases	0	0
Payments for debt-related deferred costs		0
Net proceeds from issuance of non-controlling interest	2.8	235
Distributions to partners	(27.8)	(15.8)
Contributions from (distributions to) parent	(7.4)	239.6
Taxes paid for unit-based compensation vesting	0	0
Change in intercompany balances	0	107
Net cash provided by (used in) financing activities	(32.4)	565.8
Net change in cash	(10.2)	0.4
Cash at beginning of period	23.6	0
Cash at end of period	13.4	0.4
Parent Company, Crestwood Midstream Partners, LP | Reportable Legal Entities
Cash flows from operating activities	(112.4)	(100.2)
Cash flows from investing activities:
Acquisition, net of cash acquired	0	0
Purchases of property, plant and equipment	0	0
Investments in unconsolidated affiliates	0	0
Capital distributions from unconsolidated affiliates	0	0
Capital distributions from consolidated affiliates	7.4	(239.6)
Other	0	0
Net cash used in investing activities	7.4	(239.6)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	947	1,993.7
Payments on long-term debt	(731.1)	(1,474.3)
Payments on finance leases	0	0
Payments for debt-related deferred costs		(9)
Net proceeds from issuance of non-controlling interest	0	0
Distributions to partners	(180.9)	(177.3)
Contributions from (distributions to) parent	0	0
Taxes paid for unit-based compensation vesting	0	0
Change in intercompany balances	68.5	(9.3)
Net cash provided by (used in) financing activities	103.5	323.8
Net change in cash	(1.5)	(16)
Cash at beginning of period	1.8	16.5
Cash at end of period	0.3	0.5
Crestwood Midstream Partners LP
Cash flows from operating activities	294	281
Cash flows from investing activities:
Acquisition, net of cash acquired	(162.3)	(462.1)
Purchases of property, plant and equipment	(158.8)	(347)
Investments in unconsolidated affiliates	(6)	(52.3)
Capital distributions from unconsolidated affiliates	27.8	27.3
Capital distributions from consolidated affiliates	0	0
Other	1.6	(0.4)
Net cash used in investing activities	(297.7)	(834.5)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	947	1,993.7
Payments on long-term debt	(731.1)	(1,475.2)
Payments on finance leases	(2.4)	(2.6)
Payments for debt-related deferred costs		(9)
Net proceeds from issuance of non-controlling interest	2.8	235
Distributions to partners	(208.7)	(193.1)
Contributions from (distributions to) parent	0	0
Taxes paid for unit-based compensation vesting	(15.6)	(10.9)
Change in intercompany balances	0	0
Net cash provided by (used in) financing activities	(8)	537.9
Net change in cash	(11.7)	(15.6)
Cash at beginning of period	25.4	16.5
Cash at end of period	13.7	0.9
Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities	314.3	322.1
Cash flows from investing activities:
Acquisition, net of cash acquired	(162.3)	0
Purchases of property, plant and equipment	(66.1)	(209.6)
Investments in unconsolidated affiliates	0	0
Capital distributions from unconsolidated affiliates	0	0
Capital distributions from consolidated affiliates	0	0
Other	0.6	(0.4)
Net cash used in investing activities	(227.8)	(210)
Cash flows from financing activities:
Proceeds from the issuance of long-term debt	0	0
Payments on long-term debt	0	(0.9)
Payments on finance leases	(2.4)	(2.6)
Payments for debt-related deferred costs		0
Net proceeds from issuance of non-controlling interest	0	0
Distributions to partners	0	0
Contributions from (distributions to) parent	0	0
Taxes paid for unit-based compensation vesting	(15.6)	(10.9)
Change in intercompany balances	(68.5)	(97.7)
Net cash provided by (used in) financing activities	(86.5)	(112.1)
Net change in cash	0	0
Cash at beginning of period	0	0
Cash at end of period	$ 0	$ 0