10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2021

OR

☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from               to              .

(Exact name of registrant as specified in its charter)	Commission file number	State or other jurisdiction of incorporation or organization	(I.R.S. Employer Identification No.)
Crestwood Equity Partners LP	001-34664	Delaware	43-1918951
Crestwood Midstream Partners LP	001-35377	Delaware	20-1647837

811 Main Street	Suite 3400	Houston	Texas	77002
(Address of principal executive offices)				(Zip code)

(832) 519-2200

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

	Title of each class	Trading Symbol	Name of each exchange on which registered
Crestwood Equity Partners LP	Common Units representing limited partnership interests	CEQP	New York Stock Exchange
Crestwood Equity Partners LP	Preferred Units representing limited partnership interests	CEQP-P	New York Stock Exchange
Crestwood Midstream Partners LP	None	None	None

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Crestwood Equity Partners LP	Yes	☒	No	☐
Crestwood Midstream Partners LP	Yes	☒	No	☐

(Explanatory Note: Crestwood Midstream Partners LP is currently a voluntary filer and is not subject to the filing requirements of the Securities Exchange Act of 1934. Although not subject to these filing requirements, Crestwood Midstream Partners LP has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months.)

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Crestwood Equity Partners LP	Yes	☒	No	☐
Crestwood Midstream Partners LP	Yes	☒	No	☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Crestwood Equity Partners LP	Large accelerated filer	☒	Accelerated filer	☐	Non-accelerated filer	☐	Smaller reporting company	☐	Emerging growth company	☐
Crestwood Midstream Partners LP	Large accelerated filer	☐	Accelerated filer	☐	Non-accelerated filer	☒	Smaller reporting company	☐	Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange act.

Crestwood Equity Partners LP	☐
Crestwood Midstream Partners LP	☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Crestwood Equity Partners LP	Yes	☐	No	☒
Crestwood Midstream Partners LP	Yes	☐	No	☒

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date (October 21, 2021).

Crestwood Equity Partners LP	62,899,539
Crestwood Midstream Partners LP	None

Crestwood Midstream Partners LP, as a wholly-owned subsidiary of a reporting company, meets the conditions set forth in General Instruction H(1)(a) and (b) of Form 10-Q and is therefore filing this report with the reduced disclosure format as permitted by such instruction.

CRESTWOOD EQUITY PARTNERS LP

CRESTWOOD MIDSTREAM PARTNERS LP

INDEX TO FORM 10-Q

	Page
Part I – Financial Information
Item 1. Financial Statements (Unaudited):
Crestwood Equity Partners LP
Consolidated Balance Sheets	4
Consolidated Statements of Operations	5
Consolidated Statements of Comprehensive Income	7
Consolidated Statements of Partners’ Capital	8
Consolidated Statements of Cash Flows	10
Crestwood Midstream Partners LP
Consolidated Balance Sheets	11
Consolidated Statements of Operations	12
Consolidated Statements of Partners’ Capital	13
Consolidated Statements of Cash Flows	14
Notes to Consolidated Financial Statements	15
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	39
Item 3. Quantitative and Qualitative Disclosures About Market Risk	50
Item 4. Controls and Procedures	51
Part II – Other Information
Item 1. Legal Proceedings	52
Item 1A. Risk Factors	52
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	53
Item 3. Defaults Upon Senior Securities	53
Item 4. Mine Safety Disclosures	53
Item 5. Other Information	53
Item 6. Exhibits	54
Signature	56

3

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

CRESTWOOD EQUITY PARTNERS LP

CONSOLIDATED BALANCE SHEETS

(in millions, except unit information)

	September 30, 2021		December 31, 2020
	(unaudited)
Assets
Current assets:
Cash	$	14.3	$	14.0
Accounts receivable, less allowance for doubtful accounts of $1.4 million and      $0.9 million at September 30, 2021 and December 31, 2020	420.0		262.2
Inventory	175.0		89.1
Assets from price risk management activities	39.1		27.2
Prepaid expenses and other current assets	7.1		13.4
Total current assets	655.5		405.9
Property, plant and equipment	3,788.5		3,759.6
Less: accumulated depreciation	962.7		842.5
Property, plant and equipment, net	2,825.8		2,917.1
Intangible assets	1,126.1		1,126.1
Less: accumulated amortization	377.9		331.8
Intangible assets, net	748.2		794.3
Goodwill	138.6		138.6
Operating lease right-of-use assets, net	31.1		36.8
Investments in unconsolidated affiliates	168.0		943.7
Other non-current assets	7.3		7.3
Total assets	$	4,574.5	$	5,243.7
Liabilities and capital
Current liabilities:
Accounts payable	$	358.7	$	160.3
Accrued expenses and other liabilities	140.5		122.0
Liabilities from price risk management activities	277.3		76.3
Contingent consideration, current portion	—		19.0
Current portion of long-term debt	0.2		0.2
Total current liabilities	776.7		377.8
Long-term debt, less current portion	2,024.9		2,483.8
Contingent consideration	—		38.0
Other long-term liabilities	259.8		253.3
Deferred income taxes	2.3		2.7
Total liabilities	3,063.7		3,155.6
Commitments and contingencies (Note 9)
Interest of non-controlling partner in subsidiary (Note 11)	434.5		432.7
Crestwood Equity Partners LP partners’ capital (62,897,480 common units issued and outstanding at September 30, 2021 and 73,970,208 common and subordinated units issued and outstanding at December 31, 2020)	464.3		1,043.4
Preferred units (71,257,445 units issued and outstanding at both September 30, 2021 and December 31, 2020)	612.0		612.0
Total partners’ capital	1,076.3		1,655.4
Total liabilities and capital	$	4,574.5	$	5,243.7

See accompanying notes.

4

CRESTWOOD EQUITY PARTNERS LP CONSOLIDATED STATEMENTS OF OPERATIONS (in millions, except per unit data) (unaudited)
	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Revenues:
Product revenues:
Gathering and processing	$	82.0	$	54.0	$	237.2	$	187.2
Marketing, supply and logistics	1,038.8		352.5		2,634.9		1,069.5
Related party (Note 15)	6.5		10.7		24.2		25.4
	1,127.3		417.2		2,896.3		1,282.1
Services revenues:
Gathering and processing	88.8		91.2		261.1		287.4
Storage and transportation	2.0		3.5		6.0		10.1
Marketing, supply and logistics	7.6		7.1		24.2		19.7
Related party (Note 15)	0.6		0.2		1.0		0.5
	99.0		102.0		292.3		317.7
Total revenues	1,226.3		519.2		3,188.6		1,599.8
Costs of product/services sold (exclusive of items shown separately below):
Product costs	1,060.2		348.2		2,595.8		1,090.2
Product costs - related party (Note 15)	34.8		6.1		101.3		12.9
Service costs	4.3		4.4		13.2		15.7
Total costs of products/services sold	1,099.3		358.7		2,710.3		1,118.8
Operating expenses and other:
Operations and maintenance	31.6		31.0		90.2		100.2
General and administrative	25.9		19.6		67.4		64.0
Depreciation, amortization and accretion	64.6		60.8		182.6		177.9
Loss on long-lived assets, net	18.5		21.3		19.6		26.1
Goodwill impairment	—		—		—		80.3
	140.6		132.7		359.8		448.5
Operating income (loss)	(13.6)		27.8		118.5		32.5
Earnings (loss) from unconsolidated affiliates, net	4.9		10.5		(125.9)		24.4
Interest and debt expense, net	(30.9)		(33.7)		(102.0)		(100.3)
Loss on modification/extinguishment of debt	—		—		(6.7)		—
Other income, net	0.1		—		0.2		0.2
Income (loss) before income taxes	(39.5)		4.6		(115.9)		(43.2)
(Provision) benefit for income taxes	(0.1)		—		(0.1)		0.1
Net income (loss)	(39.6)		4.6		(116.0)		(43.1)
Net income attributable to non-controlling partner	10.3		10.3		30.7		30.4
Net loss attributable to Crestwood Equity Partners LP	(49.9)		(5.7)		(146.7)		(73.5)
Net income attributable to preferred units	15.0		15.0		45.0		45.0
Net loss attributable to partners	$	(64.9)	$	(20.7)	$	(191.7)	$	(118.5)

5

CRESTWOOD EQUITY PARTNERS LP CONSOLIDATED STATEMENTS OF OPERATIONS (continued) (in millions, except per unit data) (unaudited)
	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Net loss per limited partner unit: (Note 12)
Basic and Diluted	$	(1.03)	$	(0.28)	$	(2.88)	$	(1.62)
Weighted-average limited partners’ units outstanding:
Basic and Diluted	62.9		73.4		66.6		73.1

See accompanying notes.

6

CRESTWOOD EQUITY PARTNERS LP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in millions)

(unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Net income (loss)	$	(39.6)	$	4.6	$	(116.0)	$	(43.1)
Change in fair value of Suburban Propane Partners, L.P. units	—		0.3		—		(0.8)
Comprehensive income (loss)	(39.6)		4.9		(116.0)		(43.9)
Comprehensive income attributable to non-controlling partner	10.3		10.3		30.7		30.4
Comprehensive loss attributable to Crestwood Equity Partners LP	$	(49.9)	$	(5.4)	$	(146.7)	$	(74.3)

See accompanying notes.

7

CRESTWOOD EQUITY PARTNERS LP

CONSOLIDATED STATEMENTS OF PARTNERS’ CAPITAL

(in millions)

(unaudited)

	Preferred			Partners
	Units	Capital		Common Units	Subordinated Units	Capital		Total Partners’ Capital
Balance at December 31, 2020	71.3	$	612.0	73.6	0.4	$	1,043.4	$	1,655.4
Crestwood Holdings Transactions (Note 11)	—	—		—	—	(273.2)		(273.2)
Retirement of units (Note 11)	—	—		(11.5)	(0.4)	—		—
Distributions to partners	—	(15.0)		—	—	(46.4)		(61.4)
Unit-based compensation charges	—	—		1.1	—	3.7		3.7
Taxes paid for unit-based compensation vesting	—	—		(0.4)	—	(8.1)		(8.1)
Other	—	—		—	—	(0.4)		(0.4)
Net income (loss)	—	15.0		—	—	(63.4)		(48.4)
Balance at March 31, 2021	71.3	612.0		62.8	—	655.6		1,267.6
Distributions to partners	—	(15.0)		—	—	(39.3)		(54.3)
Unit-based compensation charges	—	—		—	—	7.6		7.6
Taxes paid for unit-based compensation vesting	—	—		—	—	(0.1)		(0.1)
Other	—	—		—	—	(0.3)		(0.3)
Net income (loss)	—	15.0		—	—	(63.4)		(48.4)
Balance at June 30, 2021	71.3	612.0		62.8	—	560.1		1,172.1
Distributions to partners	—	(15.0)		—	—	(39.3)		(54.3)
Unit-based compensation charges	—	—		0.1	—	9.6		9.6
Taxes paid for unit-based compensation vesting	—	—		—	—	(0.1)		(0.1)
Other	—	—		—	—	(1.1)		(1.1)
Net income (loss)	—	15.0		—	—	(64.9)		(49.9)
Balance at September 30, 2021	71.3	$	612.0	62.9	—	$	464.3	$	1,076.3

8

CRESTWOOD EQUITY PARTNERS LP

CONSOLIDATED STATEMENTS OF PARTNERS’ CAPITAL (continued)

(in millions)

(unaudited)

	Preferred			Partners
	Units	Capital		Common Units	Subordinated Units	Capital		Total Partners’ Capital
Balance at December 31, 2019	71.3	$	612.0	71.9	0.4	$	1,320.8	$	1,932.8
Distributions to partners	—	(15.0)		—	—	(45.3)		(60.3)
Unit-based compensation charges	—	—		1.7	—	0.2		0.2
Taxes paid for unit-based compensation vesting	—	—		(0.5)	—	(15.1)		(15.1)
Change in fair value of Suburban Propane Partners, L.P. units	—	—		—	—	(1.1)		(1.1)
Other	—	—		0.2	—	3.5		3.5
Net income (loss)	—	15.0		—	—	(48.3)		(33.3)
Balance at March 31, 2020	71.3	612.0		73.3	0.4	1,214.7		1,826.7
Distributions to partners	—	(15.0)		—	—	(45.7)		(60.7)
Unit-based compensation charges	—	—		—	—	13.6		13.6
Taxes paid for unit-based compensation vesting	—	—		(0.1)	—	(0.4)		(0.4)
Other	—	—		—	—	(0.1)		(0.1)
Net income (loss)	—	15.0		—	—	(49.5)		(34.5)
Balance at June 30, 2020	71.3	612.0		73.2	0.4	1,132.6		1,744.6
Distributions to partners	—	(15.0)		—	—	(45.7)		(60.7)
Unit-based compensation charges	—	—		0.4	—	7.1		7.1
Taxes paid for unit-based compensation vesting	—	—		—	—	(0.1)		(0.1)
Change in fair value of Suburban Propane Partners, L.P. units	—	—		—	—	0.3		0.3
Other	—	—		—	—	(0.3)		(0.3)
Net income (loss)	—	15.0		—	—	(20.7)		(5.7)
Balance at September 30, 2020	71.3	$	612.0	73.6	0.4	$	1,073.2	$	1,685.2

See accompanying notes.

9

CRESTWOOD EQUITY PARTNERS LP

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in millions)

(unaudited)

	Nine Months Ended
	September 30,
	2021		2020
Operating activities
Net loss	$	(116.0)	$	(43.1)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and accretion	182.6		177.9
Amortization of debt-related deferred costs	5.1		4.9
Unit-based compensation charges	22.8		17.3
Loss on long-lived assets, net	19.6		26.1
Goodwill impairment	—		80.3
Loss on modification/extinguishment of debt	6.7		—
(Earnings) loss from unconsolidated affiliates, net, adjusted for cash distributions received	137.5		5.4
Deferred income taxes	(0.4)		(0.4)
Other	0.2		—
Changes in operating assets and liabilities	114.8		26.9
Net cash provided by operating activities	372.9		295.3
Investing activities
Acquisition, net of cash acquired (Note 3)	—		(162.3)
Purchases of property, plant and equipment	(55.8)		(158.8)
Investments in unconsolidated affiliates	(10.2)		(6.0)
Capital distributions from unconsolidated affiliates	648.4		27.8
Other	0.5		1.6
Net cash provided by (used in) investing activities	582.9		(297.7)
Financing activities
Proceeds from the issuance of long-term debt	2,236.4		947.0
Payments on long-term debt	(2,695.9)		(731.1)
Payments on finance leases	(2.1)		(2.4)
Payments for deferred financing costs	(11.1)		—
Net proceeds from issuance of non-controlling interest	1.0		2.8
Payments for Crestwood Holdings Transactions	(275.6)		—
Distributions to partners	(125.0)		(136.7)
Distributions to non-controlling partner	(29.9)		(27.8)
Distributions to preferred unitholders	(45.0)		(45.0)
Taxes paid for unit-based compensation vesting	(8.3)		(15.6)
Net cash used in financing activities	(955.5)		(8.8)
Net change in cash	0.3		(11.2)
Cash at beginning of period	14.0		25.7
Cash at end of period	$	14.3	$	14.5
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	$	(9.2)	$	40.0

See accompanying notes.

10

CRESTWOOD MIDSTREAM PARTNERS LP

CONSOLIDATED BALANCE SHEETS

(in millions)

	September 30, 2021		December 31, 2020
	(unaudited)
Assets
Current assets:
Cash	$	13.9	$	13.7
Accounts receivable, less allowance for doubtful accounts of $1.4 million and      $0.9 million at September 30, 2021 and December 31, 2020	420.0		262.2
Inventory	175.0		89.1
Assets from price risk management activities	39.1		27.2
Prepaid expenses and other current assets	7.1		13.4
Total current assets	655.1		405.6
Property, plant and equipment	4,118.6		4,089.6
Less: accumulated depreciation	1,159.1		1,028.3
Property, plant and equipment, net	2,959.5		3,061.3
Intangible assets	1,126.1		1,126.1
Less: accumulated amortization	377.9		331.8
Intangible assets, net	748.2		794.3
Goodwill	138.6		138.6
Operating lease right-of-use assets, net	31.1		36.8
Investments in unconsolidated affiliates	168.0		943.7
Other non-current assets	5.1		5.2
Total assets	$	4,705.6	$	5,385.5
Liabilities and capital
Current liabilities:
Accounts payable	$	358.6	$	157.8
Accrued expenses and other liabilities	139.3		120.1
Liabilities from price risk management activities	277.3		76.3
Contingent consideration, current portion	—		19.0
Current portion of long-term debt	0.2		0.2
Total current liabilities	775.4		373.4
Long-term debt, less current portion	2,024.9		2,483.8
Contingent consideration	—		38.0
Other long-term liabilities	256.6		251.8
Deferred income taxes	0.7		0.7
Total liabilities	3,057.6		3,147.7
Commitments and contingencies (Note 9)
Interest of non-controlling partner in subsidiary (Note 11)	434.5		432.7
Partners’ capital	1,213.5		1,805.1
Total liabilities and capital	$	4,705.6	$	5,385.5

See accompanying notes.

11

CRESTWOOD MIDSTREAM PARTNERS LP

CONSOLIDATED STATEMENTS OF OPERATIONS

(in millions)

(unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Revenues:
Product revenues:
Gathering and processing	$	82.0	$	54.0	$	237.2	$	187.2
Marketing, supply and logistics	1,038.8		352.5		2,634.9		1,069.5
Related party (Note 15)	6.5		10.7		24.2		25.4
	1,127.3		417.2		2,896.3		1,282.1
Service revenues:
Gathering and processing	88.8		91.2		261.1		287.4
Storage and transportation	2.0		3.5		6.0		10.1
Marketing, supply and logistics	7.6		7.1		24.2		19.7
Related party (Note 15)	0.6		0.2		1.0		0.5
	99.0		102.0		292.3		317.7
Total revenues	1,226.3		519.2		3,188.6		1,599.8
Costs of product/services sold (exclusive of items shown separately below):
Product costs	1,060.2		348.2		2,595.8		1,090.2
Product costs - related party (Note 15)	34.8		6.1		101.3		12.9
Service costs	4.3		4.4		13.2		15.7
Total costs of product/services sold	1,099.3		358.7		2,710.3		1,118.8
Operating expenses and other:
Operations and maintenance	31.6		31.0		90.2		100.2
General and administrative	24.4		18.5		61.3		60.4
Depreciation, amortization and accretion	68.2		64.2		193.2		188.4
Loss on long-lived assets, net	18.5		21.3		19.6		26.1
Goodwill impairment	—		—		—		80.3
	142.7		135.0		364.3		455.4
Operating income (loss)	(15.7)		25.5		114.0		25.6
Earnings (loss) from unconsolidated affiliates, net	4.9		10.5		(125.9)		24.4
Interest and debt expense, net	(30.9)		(33.7)		(102.0)		(100.3)
Loss on modification/extinguishment of debt	—		—		(6.7)		—
Income (loss) before income taxes	(41.7)		2.3		(120.6)		(50.3)
(Provision) benefit for income taxes	(0.1)		—		(0.1)		0.2
Net income (loss)	(41.8)		2.3		(120.7)		(50.1)
Net income attributable to non-controlling partner	10.3		10.3		30.7		30.4
Net loss attributable to Crestwood Midstream Partners LP	$	(52.1)	$	(8.0)	$	(151.4)	$	(80.5)

See accompanying notes.

12

CRESTWOOD MIDSTREAM PARTNERS LP

CONSOLIDATED STATEMENTS OF PARTNERS’ CAPITAL

(in millions)

(unaudited)

	Total Partners’ Capital
Balance at December 31, 2020	$	1,805.1
Distributions to partners	(334.0)
Unit-based compensation charges	2.3
Taxes paid for unit-based compensation vesting	(8.1)
Other	(0.1)
Net loss	(50.5)
Balance at March 31, 2021	1,414.7
Distributions to partners	(61.4)
Unit-based compensation charges	7.6
Taxes paid for unit-based compensation vesting	(0.1)
Net loss	(48.8)
Balance at June 30, 2021	1,312.0
Distributions to partners	(55.9)
Unit-based compensation charges	9.6
Taxes paid for unit-based compensation vesting	(0.1)
Net loss	(52.1)
Balance at September 30, 2021	$	1,213.5

	Total Partners’ Capital
Balance at December 31, 2019	$	2,099.3
Distributions to partners	(57.0)
Unit-based compensation charges	(4.4)
Taxes paid for unit-based compensation vesting	(15.1)
Other	(1.1)
Net loss	(35.5)
Balance at March 31, 2020	1,986.2
Distributions to partners	(62.0)
Unit-based compensation charges	13.6
Taxes paid for unit-based compensation vesting	(0.4)
Other	0.1
Net loss	(37.0)
Balance at June 30, 2020	1,900.5
Distributions to partners	(61.9)
Unit-based compensation charges	7.1
Taxes paid for unit-based compensation vesting	(0.1)
Other	(0.1)
Net loss	(8.0)
Balance at September 30, 2020	$	1,837.5

See accompanying notes.

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CRESTWOOD MIDSTREAM PARTNERS LP

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in millions)

(unaudited)

	Nine Months Ended
	September 30,
	2021		2020
Operating activities
Net loss	$	(120.7)	$	(50.1)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and accretion	193.2		188.4
Amortization of debt-related deferred costs	5.1		4.9
Unit-based compensation charges	22.8		17.3
Loss on long-lived assets, net	19.6		26.1
Goodwill impairment	—		80.3
Loss on modification/extinguishment of debt	6.7		—
(Earnings) loss from unconsolidated affiliates, net, adjusted for cash distributions received	137.5		5.4
Deferred income taxes	—		(0.1)
Other	0.2		—
Changes in operating assets and liabilities	114.1		21.8
Net cash provided by operating activities	378.5		294.0
Investing activities
Acquisition, net of cash acquired (Note 3)	—		(162.3)
Purchases of property, plant and equipment	(55.8)		(158.8)
Investments in unconsolidated affiliates	(10.2)		(6.0)
Capital distributions from unconsolidated affiliates	648.4		27.8
Other	0.5		1.6
Net cash provided by (used in) investing activities	582.9		(297.7)
Financing activities
Proceeds from the issuance of long-term debt	2,236.4		947.0
Payments on long-term debt	(2,695.9)		(731.1)
Payments on finance leases	(2.1)		(2.4)
Payments for deferred financing costs	(11.1)		—
Net proceeds from issuance of non-controlling interest	1.0		2.8
Distributions to partners	(451.3)		(180.9)
Distributions to non-controlling partner	(29.9)		(27.8)
Taxes paid for unit-based compensation vesting	(8.3)		(15.6)
Net cash used in financing activities	(961.2)		(8.0)
Net change in cash	0.2		(11.7)
Cash at beginning of period	13.7		25.4
Cash at end of period	$	13.9	$	13.7
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	$	(9.2)	$	40.0

See accompanying notes.

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CRESTWOOD EQUITY PARTNERS LP

CRESTWOOD MIDSTREAM PARTNERS LP

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Note 1 – Organization and Business Description

The accompanying notes to the consolidated financial statements apply to Crestwood Equity Partners LP (Crestwood Equity or CEQP) and Crestwood Midstream Partners LP (Crestwood Midstream or CMLP), unless otherwise indicated.

The accompanying consolidated financial statements and related notes should be read in conjunction with our 2020 Annual Report on Form 10-K filed with the Securities and Exchange Commission (SEC) on February 26, 2021. The financial information as of September 30, 2021, and for the three and nine months ended September 30, 2021 and 2020, is unaudited. The consolidated balance sheets as of December 31, 2020 were derived from the audited balance sheets filed in our 2020 Annual Report on Form 10-K.

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 either Crestwood Midstream Partners LP itself or Crestwood Midstream Partners LP and its consolidated subsidiaries.

Organization

Crestwood Equity Partners LP. CEQP is a publicly-traded (NYSE: CEQP) Delaware limited partnership formed in March 2001. Crestwood Equity GP LLC (Crestwood Equity GP) owns our non-economic general partnership interest. Prior to the Crestwood Holdings Transactions described below, Crestwood Equity was indirectly owned by Crestwood Holdings LLC (Crestwood Holdings), which is substantially owned and controlled by First Reserve Management, L.P. (First Reserve).

Crestwood Midstream Partners LP. Crestwood Equity owns a 99.9% limited partnership interest in Crestwood Midstream and Crestwood Gas Services GP LLC (CGS GP), a wholly-owned subsidiary of Crestwood Equity, owns a 0.1% limited partnership interest in Crestwood Midstream. Crestwood Midstream GP LLC, a wholly-owned subsidiary of Crestwood Equity, owns the non-economic general partnership interest of Crestwood Midstream.

Crestwood Holdings Transactions. In March 2021, CEQP paid Crestwood Holdings approximately $268 million to (i) acquire approximately 11.5 million CEQP common units, 0.4 million subordinated units of CEQP and 100% of the equity interests of Crestwood Marcellus Holdings LLC and Crestwood Gas Services Holdings LLC (whose assets consisted solely of CEQP common and subordinated units and 1% of the limited partner interests in Crestwood Holdings LP) in March 2021; and (ii) acquire the general partner and the remaining 99% limited partner interests of Crestwood Holdings LP (whose assets consist solely of its ownership interest in Crestwood Equity GP, which owns CEQP’s non-economic general partner interest) in August 2021 (collectively, the Crestwood Holdings Transactions). The purchase price was funded through borrowings under the Crestwood Midstream credit facility. CEQP retired the common and subordinated units acquired in the Crestwood Holdings Transactions.

The diagram below reflects a simplified version our ownership structure as of September 30, 2021 following the Crestwood Holdings Transactions.

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Business Description

Crestwood Equity 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 natural gas liquids (NGLs), crude oil, natural gas and produced water gathering, processing, storage, disposal 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.

Our financial statements reflect three operating and reporting segments described below.

•Gathering and Processing. Our gathering and processing operations provide natural gas, crude oil and produced water gathering, compression, treating, processing and disposal services to producers in multiple unconventional resource plays in some of the largest shale plays in the United States in which we have established footprints in the “core of the core” areas.

•Storage and Transportation. Our storage and transportation operations provide crude oil and natural gas storage and transportation services to producers, utilities and other customers.

•Marketing, Supply and Logistics. Our marketing, supply and logistics operations provide NGLs, crude oil and natural gas marketing, storage, terminal and transportation services to producers, refiners, marketers and other customers.

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Note 2 – Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation

Our consolidated financial statements are prepared in accordance with Generally Accepted Accounting Principles (GAAP) and include the accounts of all consolidated subsidiaries after the elimination of all intercompany accounts and transactions. Certain amounts and footnote disclosures in the prior periods have been reclassified to conform to the current year presentation, none of which impacted our previously reported net income, earnings per unit or partners’ capital. In management’s opinion, all necessary adjustments to fairly present our results of operations, financial position and cash flows for the periods presented have been made and all such adjustments are of a normal and recurring nature. Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with GAAP have been omitted pursuant to the rules and regulations of the SEC.

Significant Accounting Policies

There were no material changes in our significant accounting policies from those described in our 2020 Annual Report on Form 10-K. Below is an update of our accounting policies related to Property, Plant and Equipment and Goodwill.

During the three months ended September 30, 2021, we recorded a loss on long-lived assets of approximately $19 million related to the abandonment and dismantlement of certain of our gathering and processing segment’s Marcellus West Union compressor station assets. Our West Union compressor station assets were located in West Virginia and provided compression and dehydration services to our customers. During the three months ended September 30, 2020, we recorded a $19.9 million loss on long-lived assets related to the sale of our Fayetteville assets in October 2020 and during the nine months ended September 30, 2020 we recorded an $80.3 million full impairment of the goodwill associated with our Powder River Basin reporting unit based on events that occurred during 2020 which resulted in a significant decrease in the forecasted cash flows and fair value of the reporting unit. For a further discussion of this goodwill impairment, see our 2020 Annual Report on Form 10-K.

Note 3 – Acquisition

In April 2020, we acquired several NGL storage and rail-to-truck terminals from Plains All American Pipeline, L.P. for approximately $162 million. The acquired assets include 7 MMBbls of NGL storage and seven terminals. 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.

Note 4 – 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,
	2021		2020		2021		2020
Accrued expenses	$	51.1	$	48.3	$	49.9	$	46.4
Accrued property taxes	6.9		8.4		6.9		8.4
Income tax payable	0.3		0.2		0.3		0.2
Interest payable	36.7		24.9		36.7		24.9
Accrued additions to property, plant and equipment	18.1		12.3		18.1		12.3
Operating leases	14.5		14.7		14.5		14.7
Finance leases	2.1		2.9		2.1		2.9
Deferred revenue	10.8		10.3		10.8		10.3
Total accrued expenses and other liabilities	$	140.5	$	122.0	$	139.3	$	120.1

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Other Long-Term Liabilities

Other long-term liabilities consisted of the following (in millions):

	CEQP				CMLP
	September 30,		December 31,		September 30,		December 31,
	2021		2020		2021		2020
Contract liabilities	$	183.4	$	172.2	$	183.4	$	172.2
Operating leases	22.0		28.5		22.0		28.5
Asset retirement obligations	35.6		34.1		35.6		34.1
Other	18.8		18.5		15.6		17.0
Total other long-term liabilities	$	259.8	$	253.3	$	256.6	$	251.8

Note 5 - Investments in Unconsolidated Affiliates

Stagecoach Gas Divestiture

In July 2021, Stagecoach Gas sold certain of its wholly-owned subsidiaries to a subsidiary of Kinder Morgan, Inc. (Kinder Morgan) for approximately $1.195 billion plus certain purchase price adjustments (Initial Closing) pursuant to a purchase and sale agreement dated as of May 31, 2021 between our wholly-owned subsidiary, Crestwood Pipeline and Storage Northeast LLC (Crestwood Northeast), Con Edison Gas Pipeline and Storage Northeast, LLC (CEGP), a wholly-owned subsidiary of Consolidated Edison, Inc., Stagecoach Gas and Kinder Morgan. Following the Initial Closing and subject to certain customary closing conditions, Crestwood Northeast and CEGP will sell each of their equity interests in Stagecoach Gas and its wholly-owned subsidiary, Twin Tier Pipeline LLC, (Second Closing) to Kinder Morgan for approximately $30 million, subject to certain closing adjustments.

In conjunction with the Initial Closing, we recorded our share of a loss on long-lived assets (including goodwill) recorded by our Stagecoach Gas equity investment associated with the sale. This eliminated our $51.3 million historical basis difference between our investment balance and the equity in the underlying net assets of Stagecoach Gas, and also resulted in a $155.4 million reduction in our earnings from unconsolidated affiliates during the nine months ended September 30, 2021. In addition, our earnings from unconsolidated affiliates during the nine months ended September 30, 2021 were also reduced by our proportionate share of transaction costs of approximately $3.0 million related to the Initial Closing, which were paid by us in July 2021 on behalf of Stagecoach Gas. Our Stagecoach Gas investment is included in our storage and transportation segment.

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Net Investments and Earnings (Loss) of Unconsolidated Affiliates

Our net investments in and earnings (loss) from our unconsolidated affiliates are as follows (in millions):

	Investment				Earnings (Loss) from Unconsolidated Affiliates				Earnings (Loss) from Unconsolidated Affiliates
					Three Months Ended				Nine Months Ended
	September 30,		December 31,		September 30,				September 30,
	2021		2020		2021		2020		2021		2020
Stagecoach Gas Services LLC(1)	$	15.2	$	792.5	$	0.9	$	9.9	$	(139.4)	$	28.3
Tres Palacios Holdings LLC(2)	38.4		35.5		(0.1)		0.1		9.1		0.2
Powder River Basin Industrial Complex, LLC(3)	3.5		3.6		(0.1)		—		—		(4.4)
Crestwood Permian Basin Holdings LLC(4)	110.9		112.1		4.2		0.5		4.4		0.3
Total	$	168.0	$	943.7	$	4.9	$	10.5	$	(125.9)	$	24.4

(1)As of September 30, 2021, our equity in the underlying net assets of Stagecoach Gas approximates the carrying value of our investment.

(2)As of September 30, 2021, our equity in the underlying net assets of Tres Palacios Holdings LLC (Tres Holdings) exceeded the carrying value of our investment balance by approximately $21.8 million. During both the three and nine months ended September 30, 2021 and 2020, we recorded amortization of approximately $0.3 million and $0.9 million, respectively, related to this excess basis, which is reflected as an increase in our earnings from unconsolidated affiliates in our consolidated statements of operations. Our Tres Holdings investment is included in our storage and transportation segment.

(3)As of September 30, 2021, our equity in the underlying net assets of Powder River Basin Industrial Complex, LLC (PRBIC) approximates the carrying value of 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.

(4)As of September 30, 2021, our equity in the underlying net assets of Crestwood Permian exceeded our investment balance by $7.5 million, and this excess amount is not subject to amortization. Our Crestwood Permian investment is included in our gathering and processing segment and is no longer considered a variable interest entity.

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,
	2021						2020
	Operating Revenues		Operating Expenses		Net Income (Loss)		Operating Revenues		Operating Expenses		Net Income (Loss)
Stagecoach Gas	$	81.4	$	456.9	$	(375.5)	$	115.3	$	58.9	$	56.5
Other(1)	232.4		208.2		24.9		91.2		113.0		(21.0)
Total	$	313.8	$	665.1	$	(350.6)	$	206.5	$	171.9	$	35.5

(1)Includes our Tres Holdings, PRBIC and Crestwood Permian equity investments.

Distributions and Contributions

The following table summarizes our distributions from and contributions to our unconsolidated affiliates (in millions):

	Distributions(1)				Contributions
	Nine Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Stagecoach Gas	$	640.9	$	44.5	$	—	$	—
Tres Holdings	13.1		4.4		6.9		6.0
PRBIC	0.1		0.2		—		—
Crestwood Permian	8.9		8.5		3.3		—
Total	$	663.0	$	57.6	$	10.2	$	6.0

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(1)    In July 2021, Stagecoach Gas closed on the sale of certain of its wholly-owned subsidiaries to a subsidiary of Kinder Morgan and distributed to us approximately $613.9 million as our proportionate share of the gross proceeds received from the sale. We utilized approximately $3 million of these proceeds to pay transaction costs related to the sale described above, $40 million of these proceeds to pay our remaining contingent consideration obligation and related accrued interest described below, and the remaining proceeds to repay a portion of the amounts outstanding under the Crestwood Midstream credit facility. In October 2021, we received cash distributions from Tres Holdings and Crestwood Permian of approximately $2.4 million and $7.4 million, respectively.

Other

Contingent Consideration. Pursuant to the Stagecoach Gas limited liability company agreement, we were required to make payments to CEGP because certain performance targets on growth capital projects were not achieved by December 31, 2020. During the nine months ended September 30, 2021, we fully satisfied this obligation by paying $57 million plus accrued interest of $2.1 million to CEGP.

Guarantee. CEQP issued a guarantee under which CEQP would be required to pay up to $10 million if Crestwood Permian fails to honor its obligations to Crestwood Permian Basin LLC, a 50% equity investment of Crestwood Permian, in the event Crestwood Permian Basin LLC fails to satisfy its obligations under its gas gathering agreement with a third party. We do not believe that it is probable that this guarantee will result in future losses based on our assessment of the nature of the guarantee, the financial condition of the guaranteed party and the period of time that the guarantee has been outstanding, and as a result, we have not recorded a liability related to this guarantee on our consolidated balance sheets at September 30, 2021 and December 31, 2020.

Note 6 – 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.

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 product costs in our consolidated statements of operations. The following table summarizes the impact to our consolidated statements of operations related to our commodity-based derivatives during the three and nine months ended September 30, 2021 and 2020 (in millions):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Product revenues	$	129.4	$	32.4	$	296.9	$	125.4
Gain (loss) reflected in product costs	$	(53.4)	$	(1.8)	$	(94.8)	$	13.4

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 product costs related to these instruments.

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Notional Amounts and Terms

The notional amounts of our derivative financial instruments include the following:

	September 30, 2021		December 31, 2020
	Fixed Price Payor	Fixed Price Receiver	Fixed Price Payor	Fixed Price Receiver
Propane, ethane, butane, heating oil and crude oil (MMBbls)	73.9	78.4	72.7	76.5
Natural gas (Bcf)	32.1	42.8	22.6	28.6

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, 86% of the contracted volumes will be delivered or settled within 12 months.

Credit Risk

Inherent in our contractual portfolio are certain credit risks. Credit risk is the risk of loss from nonperformance by suppliers, customers or financial counterparties to a contract. We take an active role in managing credit risk and have established control procedures, which are reviewed on an ongoing basis. We attempt to minimize credit risk exposure through credit policies and periodic monitoring procedures as well as through customer deposits, letters of credit and entering into netting agreements that allow for offsetting counterparty receivable and payable balances for certain financial transactions, as deemed appropriate. The counterparties associated with our price risk management activities are energy marketers and propane retailers, resellers and dealers.

Certain of our derivative instruments have credit limits that require us to post collateral. The amount of collateral required to be posted is a function of the net liability position of the derivative as well as our established credit limit with the respective counterparty. If our credit rating were to change, the counterparties could require us to post additional collateral. The amount of additional collateral that would be required to be posted would vary depending on the extent of change in our credit rating as well as the requirements of the individual counterparty. In addition, we have margin requirements with a derivative clearing broker and a third party broker related to our net asset or liability position with each respective 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, 2021		December 31, 2020
Aggregate fair value liability of derivative instruments with credit-risk-related contingent features(1)	$	157.6	$	38.5
Broker-related net derivative asset position	$	199.6	$	35.9
Broker-related cash collateral received	$	163.9	$	18.3
Cash collateral received, net	$	14.3	$	12.4

(1)At September 30, 2021 and December 31, 2020, we posted $1.1 million and less than $0.1 million of collateral associated with these derivatives.

Note 7 – 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

21

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.

Financial Assets and Liabilities

As of September 30, 2021 and December 31, 2020, 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 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 New York Mercantile Exchange 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, 2021 and December 31, 2020 (in millions):

	September 30, 2021
	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	$	74.2	$	1,469.0	$	—	$	1,543.2	$	(1,339.6)	$	(164.5)	$	39.1
Suburban Propane Partners, L.P. units(2)	2.2		—		—		2.2		—		—		2.2
Total assets at fair value	$	76.4	$	1,469.0	$	—	$	1,545.4	$	(1,339.6)	$	(164.5)	$	41.3
Liabilities
Liabilities from price risk management	$	55.8	$	1,547.4	$	—	$	1,603.2	$	(1,339.6)	$	13.7	$	277.3
Total liabilities at fair value	$	55.8	$	1,547.4	$	—	$	1,603.2	$	(1,339.6)	$	13.7	$	277.3

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	December 31, 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	$	20.2	$	480.5	$	—	$	500.7	$	(455.0)	$	(18.5)	$	27.2
Suburban Propane Partners, L.P. units(2)	2.1		—		—		2.1		—		—		2.1
Total assets at fair value	$	22.3	$	480.5	$	—	$	502.8	$	(455.0)	$	(18.5)	$	29.3
Liabilities
Liabilities from price risk management	$	25.1	$	494.0	$	—	$	519.1	$	(455.0)	$	12.2	$	76.3
Total liabilities at fair value	$	25.1	$	494.0	$	—	$	519.1	$	(455.0)	$	12.2	$	76.3

(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 non-current assets on CEQP’s consolidated balance sheets.

Cash, Accounts Receivable and Accounts Payable

As of September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020, 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, 2021				December 31, 2020
	Carrying  Amount		Fair Value		Carrying  Amount		Fair Value
2023 Senior Notes	$	—	$	—	$	683.8	$	691.5
2025 Senior Notes	$	496.3	$	511.9	$	495.5	$	509.9
2027 Senior Notes	$	594.0	$	618.4	$	593.2	$	594.1
2029 Senior Notes	$	690.5	$	734.0	$	—	$	—

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Note 8 – Long-Term Debt

Long-term debt consisted of the following at September 30, 2021 and December 31, 2020 (in millions):

	September 30, 2021		December 31, 2020
Credit Facility	$	250.5	$	719.0
2023 Senior Notes	—		687.2
2025 Senior Notes	500.0		500.0
2027 Senior Notes	600.0		600.0
2029 Senior Notes	700.0		—
Other(1)	0.2		0.4
Less: deferred financing costs, net	25.6		22.6
Total debt	2,025.1		2,484.0
Less: current portion	0.2		0.2
Total long-term debt, less current portion	$	2,024.9	$	2,483.8

(1)Represents non-interest bearing obligations related to certain companies acquired in 2014 with payments due through 2022.

Credit Facility

Crestwood Midstream’s five-year $1.25 billion revolving credit facility (the CMLP Credit Facility) is available to fund acquisitions, working capital and internal growth projects and for general partnership purposes. Contemporaneous with the Crestwood Holdings Transactions described in Note 1, Crestwood Midstream entered into the Third Amendment to its credit agreement in order to, among other things, permit the borrowings under the CMLP Credit Facility to fund the Crestwood Holdings Transactions and revise the definition of Change in Control in the CMLP Credit Agreement as it relates to the control of CEQP’s general partner). The other covenants and restrictive provisions under the amended credit agreement are materially consistent with the covenants that existed at December 31, 2020.

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, 2021, the net debt to consolidated EBITDA ratio was approximately 3.45 to 1.0, the consolidated EBITDA to consolidated interest expense ratio was approximately 4.98 to 1.0, and the senior secured leverage ratio was 0.42 to 1.0.

At September 30, 2021, Crestwood Midstream had $985.3 million of available capacity under its credit facility considering the most restrictive debt covenants in its credit agreement. At September 30, 2021 and December 31, 2020, Crestwood Midstream’s outstanding standby letters of credit were $14.2 million and $23.9 million. Borrowings under the credit facility accrue interest at prime or Eurodollar based rates plus applicable spreads, which resulted in interest rates between 2.34% and 4.50% at September 30, 2021 and 2.40% and 4.50% at December 31, 2020. The weighted-average interest rate on outstanding borrowings as of September 30, 2021 and December 31, 2020 was 2.41% and 2.45%.

Senior Notes

2029 Senior Notes. In January 2021, Crestwood Midstream issued $700 million of 6.00% unsecured senior notes due 2029 (the 2029 Senior Notes). The 2029 Senior Notes will mature on February 1, 2029, and interest is payable semi-annually in arrears on February 1 and August 1 of each year, beginning on August 1, 2021. The net proceeds from this offering of approximately $691.0 million were used to repay a portion of the 2023 Senior Notes and to repay indebtedness under the CMLP Credit Facility.

2023 Senior Note Repayments. During the nine months ended September 30, 2021, we redeemed $687.2 million of principal outstanding under our 2023 Senior Notes. In conjunction with the repayment of the notes, we recognized a loss on extinguishment of debt of approximately $6.7 million during the nine months ended September 30, 2021, and paid approximately $8.6 million of accrued interest on the 2023 Senior Notes on the dates they were repurchased. We funded the

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repayment using a portion of the proceeds from the issuance of the 2029 Senior Notes and borrowings under the CMLP Credit Facility.

Note 9 – 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. During the three months ended September 30, 2021, we paid approximately $19.5 million to Linde related to this matter, and Linde claims remaining unpaid invoices of approximately $36 million, along with 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, 2021 and December 31, 2020, we had approximately $16.6 million and $10.4 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 2019, we experienced produced water releases on our Arrow water gathering system located within the Fort Berthold Indian Reservation in North Dakota. In January 2021, we received a Notice of Violation and Opportunity to Confer from the Environmental Protection Agency (EPA) related to the water releases. In March 2021, we executed a Consent Agreement with the EPA and agreed to pay $0.1 million for penalties related to the water releases. The EPA provided the public a 30-day period to comment on the Consent Agreement and is currently reviewing the comments received. We expect to finalize and settle the Consent Agreement after the EPA completes its review and response, if necessary, to the comments received. We are also substantially complete with all remediation efforts related to the water releases and continue to monitor any remaining impacts. We will continue our remediation efforts to ensure that lands impacted by the produced water releases are fully remediated. In response to the water releases, we removed several miles of gathering pipeline from the system that remained in service and replaced those sections with a pipeline composed of higher capacity material that is more suitable to the environment and climate conditions in the Bakken. The replaced pipeline increased water gathering capacity on the Arrow

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system and furthers our commitment to sustainability and environmental stewardship in the areas where we live and operate. We believe these events are insurable under our policies. We have not recorded an insurance receivable as of September 30, 2021.

At September 30, 2021 and December 31, 2020, our accrual of approximately $1.2 million and $1.3 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 $1.2 million to $1.9 million at September 30, 2021.

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 previously disposed of 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, 2021 and December 31, 2020 (in millions):

	CEQP				CMLP
	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Self-insurance reserves(1)	$	6.7	$	7.7	$	5.8	$	6.7

(1)At September 30, 2021, CEQP and CMLP classified approximately $4.8 million and $4.1 million, respectively, of these reserves as other long-term liabilities on their consolidated balance sheets.

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, 2021 and December 31, 2020, we have no amounts accrued for these guarantees.

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Note 10 - Leases

The following table summarizes the balance sheet information related to our operating and finance leases at September 30, 2021 and December 31, 2020 (in millions):

	September 30, 2021		December 31, 2020
Operating Leases
Operating lease right-of-use assets, net	$	31.1	$	36.8
Accrued expenses and other liabilities	$	14.5	$	14.7
Other long-term liabilities	22.0		28.5
Total operating lease liabilities	$	36.5	$	43.2
Finance Leases
Property, plant and equipment	$	12.1	$	13.3
Less: accumulated depreciation	8.5		7.9
Property, plant and equipment, net	$	3.6	$	5.4
Accrued expenses and other liabilities	$	2.1	$	2.9
Other long-term liabilities	1.2		1.9
Total finance lease liabilities	$	3.3	$	4.8

Lease expense. Our operating lease expense, net totaled $3.7 million and $5.8 million for the three months ended September 30, 2021 and 2020 and $12.8 million and $20.4 million for the nine months ended September 30, 2021 and 2020. Our finance lease expense totaled $0.8 million and $0.9 million for the three months ended September 30, 2021 and 2020 and $2.6 million and $3.1 million for the nine months ended September 30, 2021 and 2020.

Note 11 – Partners’ Capital and Non-Controlling Partner

Common and Subordinated Units

In conjunction with the Crestwood Holdings Transactions discussed in Note 1, in March 2021, CEQP acquired approximately 11.5 million CEQP common units and 0.4 million subordinated units of CEQP from Crestwood Holdings for approximately $268 million. CEQP reflected the purchase price as a reduction to its common unitholders’ partners’ capital in its consolidated statement of partners’ capital during the first quarter of 2021. The Crestwood Holdings Transactions resulted in CEQP retiring the common and subordinated units acquired from Crestwood Holdings. Transaction costs related to the Crestwood Holdings Transactions of approximately $7.6 million are reflected as a reduction of CEQP’s common unitholders’ partners’ capital in its consolidated statement of partners’ capital during the first quarter of 2021.

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Distributions

Crestwood Equity

Limited Partners. A summary of CEQP’s limited partner quarterly cash distributions for the nine months ended September 30, 2021 and 2020 is presented below:

Record Date	Payment Date	Per Unit Rate		Cash Distributions (in millions)
2021
February 5, 2021	February 12, 2021	$	0.625	$	46.4
May 7, 2021	May 14, 2021	$	0.625	39.3
August 6, 2021	August 13, 2021	$	0.625	39.3
				$	125.0
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

On October 14, 2021, we declared a distribution of $0.625 per limited partner unit to be paid on November 12, 2021 to unitholders of record on November 5, 2021 with respect to the quarter ended September 30, 2021.

Preferred Unitholders. During the nine months ended September 30, 2021 and 2020, we paid cash distributions to our preferred unitholders of approximately $45 million in both periods. On October 14, 2021, the board of directors of our general partner authorized a cash distribution to our preferred unitholders of approximately $15 million for the quarter ended September 30, 2021.

Crestwood Midstream

During the nine months ended September 30, 2021 and 2020, Crestwood Midstream paid cash distributions of $451.3 million and $180.9 million to its partners.

Non-Controlling Partner

Crestwood Niobrara issued preferred interests to CN Jackalope Holdings LLC (Jackalope Holdings), which are reflected as non-controlling interest in subsidiary apart from partners’ capital (i.e., temporary equity) on our consolidated balance sheets. 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, 2021 and 2020 (in millions):

Balance at December 31, 2020	$	432.7
Contributions from non-controlling partner	1.0
Distributions to non-controlling partner	(29.9)
Net income attributable to non-controlling partner	30.7
Balance at September 30, 2021	$	434.5

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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

In October 2021, Crestwood Niobrara paid cash distributions to Jackalope Holdings of approximately $10.3 million for the quarter ended September 30, 2021.

Other

In February 2021, Crestwood Equity issued 50,000 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, 2021, we had total unamortized compensation expense of approximately $0.9 million related to these performance units. During the three and nine months ended September 30, 2021, we recognized compensation expense of $0.1 million and $0.2 million related to these performance units, which is included in general and administrative expenses on our consolidated statements of operations.

Note 12 - Earnings Per Limited Partner Unit

Prior to the Crestwood Holdings transactions, we calculated basic net income per limited partner unit using the two-class method. Our income (loss) was allocated to our common units and other participating securities (i.e., subordinated units) based on the amount of dividends paid in the current period plus an allocation of the undistributed earnings or excess distributions over earnings to the extent that each security participates in income (loss) or excess distributions over income (loss). The dilutive effect of the stock-based compensation performance units is calculated using the treasury stock method which considers the impact to net income or loss attributable to Crestwood Equity Partners and limited partner units from the potential issuance of limited partner units. The dilutive effect of the preferred units and Crestwood Niobrara preferred units are calculated using the if-converted method which assumes units are converted at the beginning of the period (beginning with their respective issuance date), and the resulting common units are included in the denominator of the diluted net income per common unit calculation for the period being presented. Distributions declared in the period and undeclared distributions that accumulated during the period are added back to the numerator for purposes of the if-converted calculation.

We exclude potentially dilutive securities from the determination of diluted earnings per unit (as well as their related income statement impacts) when their impact is anti-dilutive. The following table summarizes information regarding the weighted-average of common units excluded during the three and nine months ended September 30, 2021 and 2020 (in millions):

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2021	2020	2021	2020
Preferred units (1)	7.1	7.1	7.1	7.1
Crestwood Niobrara’s preferred units(1)	3.9	8.7	3.9	8.7
Unit-based compensation performance units(1)	0.2	0.2	0.1	0.3
Subordinated units(1)(2)	—	0.4	0.1	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 2020 Annual Report on Form 10-K.

(2)In conjunction with the Crestwood Holdings Transactions, in March 2021, CEQP retired the subordinated units. For additional information regarding the retirement of the subordinated units, see Note 1 and Note 11.

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Note 13 – Segments

We have three operating and reportable segments: (i) gathering and processing; (ii) storage and transportation; and (iii) marketing, supply and logistics. Our corporate operations include all general and administrative expenses that are not allocated to our reportable segments. For a further description of our operating and reporting segments, see Note 1. We assess the performance of our operating segments based on EBITDA, which is defined as income before income taxes, plus debt-related costs (interest and debt expense, net and loss on modification/extinguishment of debt) and depreciation, amortization and accretion expense.

Below is a reconciliation of CEQP’s and CMLP’s net loss to EBITDA (in millions):

	CEQP								CMLP
	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
	2021		2020		2021		2020		2021		2020		2021		2020
Net income (loss)	$	(39.6)	$	4.6	$	(116.0)	$	(43.1)	$	(41.8)	$	2.3	$	(120.7)	$	(50.1)
Add:
Interest and debt expense, net	30.9		33.7		102.0		100.3		30.9		33.7		102.0		100.3
Loss on modification/extinguishment of debt	—		—		6.7		—		—		—		6.7		—
Provision (benefit) for income taxes	0.1		—		0.1		(0.1)		0.1		—		0.1		(0.2)
Depreciation, amortization and accretion	64.6		60.8		182.6		177.9		68.2		64.2		193.2		188.4
EBITDA	$	56.0	$	99.1	$	175.4	$	235.0	$	57.4	$	100.2	$	181.3	$	238.4

The following tables summarize CEQP’s and CMLP’s reportable segment data for the three and nine months ended September 30, 2021 and 2020 (in millions). Intersegment revenues included in the following tables are accounted for as arms-length transactions that apply our revenue recognition policy described in our 2020 Annual Report on Form 10-K. Included in earnings (loss) from unconsolidated affiliates, net reflected in the tables below was approximately $4.9 million and $9.9 million of our proportionate share of interest expense, depreciation and amortization expense, goodwill impairments and gains (losses) on long-lived assets, net recorded by our equity investments for the three months ended September 30, 2021 and 2020 and $182.4 million and $33.2 million for the nine months ended September 30, 2021 and 2020.

Segment EBITDA Information

	Three Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
Revenues	$	171.2	$	2.0	$	1,053.1	$	—	$	1,226.3
Intersegment revenues	125.6		2.3		(127.9)		—		—
Costs of product/services sold	150.1		(0.2)		949.4		—		1,099.3
Operations and maintenance expense	19.5		1.5		10.6		—		31.6
General and administrative expense	—		—		—		24.4		24.4
Loss on long-lived assets, net	(18.5)		—		—		—		(18.5)
Earnings from unconsolidated affiliates, net	4.2		0.7		—		—		4.9
Crestwood Midstream EBITDA	$	112.9	$	3.7	$	(34.8)	$	(24.4)	$	57.4
Crestwood Equity
General and administrative expense	—		—		—		1.5		1.5
Other income, net	—		—		—		0.1		0.1
Crestwood Equity EBITDA	$	112.9	$	3.7	$	(34.8)	$	(25.8)	$	56.0

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	Three Months Ended September 30, 2020
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
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
Crestwood Midstream EBITDA	$	88.9	$	14.7	$	14.9	$	(18.3)	$	100.2
Crestwood Equity
General and administrative expense	—		—		—		1.1		1.1
Crestwood Equity EBITDA	$	88.9	$	14.7	$	14.9	$	(19.4)	$	99.1

	Nine Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
Revenues	$	498.9	$	6.0	$	2,683.7	$	—	$	3,188.6
Intersegment revenues	315.1		7.8		(322.9)		—		—
Costs of product/services sold	387.2		(0.2)		2,323.3		—		2,710.3
Operations and maintenance expense	55.6		3.1		31.5		—		90.2
General and administrative expense	—		—		—		61.3		61.3
Gain (loss) on long-lived assets, net	(19.7)		—		0.1		—		(19.6)
Earnings (loss) from unconsolidated affiliates, net	4.4		(130.3)		—		—		(125.9)
Crestwood Midstream EBITDA	$	355.9	$	(119.4)	$	6.1	$	(61.3)	$	181.3
Crestwood Equity
General and administrative expense	—		—		—		6.1		6.1
Other income, net	—		—		—		0.2		0.2
Crestwood Equity EBITDA	$	355.9	$	(119.4)	$	6.1	$	(67.2)	$	175.4

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	Nine Months Ended September 30, 2020
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
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
Crestwood Midstream EBITDA	$	211.6	$	38.0	$	49.0	$	(60.2)	$	238.4
Crestwood Equity
General and administrative expense	—		—		—		3.6		3.6
Other income, net	—		—		—		0.2		0.2
Crestwood Equity EBITDA	$	211.6	$	38.0	$	49.0	$	(63.6)	$	235.0

Other Segment Information

	CEQP				CMLP
	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Total Assets
Gathering and Processing	$	3,357.4	$	3,464.6	$	3,491.9	$	3,609.7
Storage and Transportation	163.6		944.6		163.6		944.6
Marketing, Supply and Logistics	1,032.8		805.0		1,032.8		805.0
Corporate	20.7		29.5		17.3		26.2
Total Assets	$	4,574.5	$	5,243.7	$	4,705.6	$	5,385.5

Note 14 - 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 accounted for under Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) totaled $350.0 million and $219.9 million for both CEQP and CMLP at September 30, 2021 and December 31, 2020, 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, 2021		December 31, 2020
Contract assets (non-current)	$	1.4	$	1.0
Contract liabilities (current)(1)	$	10.8	$	10.3
Contract liabilities (non-current)(1)	$	183.4	$	172.2

(1)During the three and nine months ended September 30, 2021, we recognized revenues of approximately $3.4 million and $9.8 million that were previously included in contract liabilities at December 31, 2020. The remaining change in our contract liabilities during the three and nine months ended September 30, 2021, related to capital reimbursements associated with our revenue contracts and revenue deferrals associated with our contracts with increasing (decreasing) rates.

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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, 2021 (in millions):

Remainder of 2021	$	23.3
2022	75.4
2023	52.6
2024	31.7
Total	$	183.0

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, 2021 and 2020 (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. Our non-Topic 606 revenues presented in the tables below primarily represents revenues related to our commodity-based derivatives.

	Three Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Intersegment Elimination		Total
Topic 606 revenues
Gathering
Natural gas	$	35.3	$	—	$	—	$	—	$	35.3
Crude oil	17.1		—		—		—		17.1
Water	24.8		—		—		—		24.8
Processing
Natural gas	7.2		—		—		—		7.2
Compression
Natural gas	3.7		—		—		—		3.7
Storage
Crude oil	0.1		0.4		—		(0.4)		0.1
NGLs	—		—		2.6		—		2.6
Pipeline
Crude oil	—		1.5		—		(0.9)		0.6
Transportation
Crude oil	0.8		—		—		(0.1)		0.7
NGLs	—		—		4.1		—		4.1
Rail Loading
Crude oil	—		2.2		—		(1.0)		1.2
Product Sales
Natural gas	42.9		—		84.5		(42.7)		84.7
Crude oil	105.4		—		331.3		(25.1)		411.6
NGLs	59.1		—		500.1		(57.6)		501.6
Other	—		0.2		0.4		(0.1)		0.5
Total Topic 606 revenues	296.4		4.3		923.0		(127.9)		1,095.8
Non-Topic 606 revenues	0.4		—		130.1		—		130.5
Total revenues	$	296.8	$	4.3	$	1,053.1	$	(127.9)	$	1,226.3

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	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	—		—		32.9		—		32.9
Total revenues	$	190.1	$	5.4	$	370.5	$	(46.8)	$	519.2

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	Nine Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Intersegment Elimination		Total
Topic 606 revenues
Gathering
Natural gas	$	100.0	$	—	$	—	$	—	$	100.0
Crude oil	56.2		—		—		—		56.2
Water	69.5		—		—		—		69.5
Processing
Natural gas	21.5		—		—		—		21.5
Compression
Natural gas	12.1		—		—		—		12.1
Storage
Crude oil	0.3		1.9		—		(1.8)		0.4
NGLs	—		—		8.7		—		8.7
Pipeline
Crude oil	—		4.5		—		(2.5)		2.0
NGLs	—		—		0.1		—		0.1
Transportation
Crude oil	1.9		—		—		(0.1)		1.8
NGLs	—		—		12.5		—		12.5
Rail Loading
Crude oil	—		6.8		—		(3.4)		3.4
Product Sales
Natural gas	112.5		—		224.4		(111.7)		225.2
Crude oil	297.1		—		926.9		(62.5)		1,161.5
NGLs	142.3		—		1,210.9		(140.5)		1,212.7
Other	—		0.6		1.2		(0.4)		1.4
Total Topic 606 revenues	813.4		13.8		2,384.7		(322.9)		2,889.0
Non-Topic 606 revenues	0.6		—		299.0		—		299.6
Total revenues	$	814.0	$	13.8	$	2,683.7	$	(322.9)	$	3,188.6

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	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	—		—		126.5		—		126.5
Total revenues	$	573.8	$	17.0	$	1,115.1	$	(106.1)	$	1,599.8

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Note 15 – Related Party Transactions

Prior to August 2021, Crestwood Holdings indirectly owned our general partner and the affiliates of Crestwood Holdings and its owners were considered CEQP’s and CMLP’s related parties. With the completion of the Crestwood Holdings Transactions in August 2021, Crestwood Holdings and its affiliates are no longer considered related parties of CEQP and CMLP. We enter into transactions with our affiliates within the ordinary course of business, including 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, 2021 and 2020, we paid approximately $0.6 million and $3.2 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 2020 Annual Report on Form 10-K.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Revenues at CEQP and CMLP(1)	$	7.1	$	10.9	$	25.2	$	25.9
Costs of product/services sold at CEQP and CMLP(2)	$	34.8	$	6.1	$	101.3	$	12.9
Operations and maintenance expenses charged by CEQP and CMLP(3)	$	5.1	$	5.0	$	16.8	$	16.7
General and administrative expenses charged by CEQP to CMLP, net(4)	$	11.9	$	7.4	$	24.4	$	25.4
General and administrative expenses at CEQP charged to Crestwood Holdings, net(5)	$	—	$	1.2	$	4.8	$	12.5

(1)Primarily relates to the sale of NGLs to a subsidiary of Crestwood Permian.

(2)Includes (i) $30.4 million and $75.5 million during the three and nine months ended September 30, 2021 and $5.7 million and $12.1 million during the three and nine months ended September 30, 2020 related to purchases of natural gas and NGLs from a subsidiary of Crestwood Permian; (ii) $0.2 million and $11.3 million during the three and nine months ended September 30, 2021 and $0.3 million and $0.4 million during the three and nine months ended September 30, 2020 related to purchases of natural gas from a subsidiary of Tres Holdings and (iii) $4.2 million and $14.5 million during the three and nine months ended September 30, 2021 and $0.1 million and $0.4 million during the three and nine months ended September 30, 2020 related to purchases of NGLs from Ascent Resources - Utica, 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, 2021, we charged $0.1 million and $3.4 million to Stagecoach Gas, $1.2 million and $3.6 million to Tres Holdings, and $3.8 million and $9.8 million to Crestwood Permian. 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.

(4)Includes $12.9 million and $27.4 million of unit-based compensation charges allocated from CEQP to CMLP for the three and nine months ended September 30, 2021 and $8.4 million and $28.5 million for the three and nine months ended September 30, 2020. In addition, includes $1.0 million and $3.0 million of CMLP’s general and administrative costs allocated to CEQP during the three and nine months ended September 30, 2021 and $1.0 million and $3.1 million during the three and nine months ended September 30, 2020.

(5)Includes a $0.3 million reduction of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three months ended September 30, 2020. Also includes a $4.6 million and a $11.2 million reduction of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the nine months ended September 30, 2021 and 2020. During the three months ended September 30, 2021, there were no unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP. CEQP allocates a portion of its general and administrative costs to Crestwood Holdings and during the nine months ended September 30, 2021, CEQP allocated $0.2 million of it’s general and administrative costs to Crestwood Holdings and approximately $0.9 million and $1.3 million of costs were allocated to Crestwood Holdings during the three and nine months ended September 30, 2020. During the three months ended September 30, 2021, CEQP did not allocate any general and administrative costs to Crestwood Holdings.

The following table shows accounts receivable and accounts payable with our affiliates (in millions):

	September 30, 2021		December 31, 2020
Accounts receivable at CEQP and CMLP	$	7.3	$	2.5
Accounts payable at CEQP(1)	$	13.1	$	7.5
Accounts payable at CMLP	$	13.1	$	5.0

(1)In conjunction with the Crestwood Holdings Transactions discussed in Note 1, CEQP eliminated approximately $2.4 million of accounts payable to Crestwood Holdings which is reflected as an increase to CEQP’s common unitholders’ partners’ capital in its consolidated statement of partners’ capital during the first quarter of 2021.

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Note 16 – Subsequent Event

On October 25, 2021, we entered into a merger agreement with Oasis Midstream Partners LP (Oasis Midstream) under which we will acquire Oasis Midstream in an equity and cash transaction valued at approximately $1.8 billion. Pursuant to the merger agreement, Oasis Petroleum Inc. (Oasis Petroleum) will receive $150 million in cash plus 21.0 million newly issued CEQP common units in exchange for its 33.8 million common units held in Oasis Midstream. In addition, Oasis Midstream’s public unitholders will receive 12.9 million newly issued CEQP common units in exchange for the 14.8 million Oasis Midstream common units held by them. Additionally, under the merger agreement, Oasis Petroleum will receive a $10 million cash payment for its ownership of the general partner of Oasis Midstream. The completion of the merger is subject to the satisfaction or waiver of customary closing conditions, including, among others: (i) adoption of the merger agreement by holders of a majority of the outstanding Oasis Midstream common units, (ii) expiration or termination of review under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 and (iii) effectiveness of a registration statement on Form S-4 in connection with the issuance of CEQP common units in the merger.

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Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations

Our Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with the consolidated financial statements and the accompanying footnotes and Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations in our 2020 Annual Report on Form 10-K.

This report, including information included or incorporated by reference herein, contains forward-looking statements concerning the financial condition, results of operations, plans, objectives, future performance and business of our company and its subsidiaries. These forward-looking statements include:

•statements that are not historical in nature, including, but not limited to: (i) our belief that anticipated cash from operations, cash distributions from entities that we control, and borrowing capacity under our credit facility will be sufficient to meet our anticipated liquidity needs for the foreseeable future; (ii) our belief that we do not have material potential liability in connection with legal proceedings that would have a significant financial impact on our consolidated financial condition, results of operations or cash flows; and (iii) our belief that our assets will continue to benefit from the development of unconventional shale plays as significant supply basins; and

•statements preceded by, followed by or that contain forward-looking terminology including the words “believe,” “expect,” “may,” “will,” “should,” “could,” “anticipate,” “estimate,” “intend” or the negation thereof, or similar expressions.

Forward-looking statements are not guarantees of future performance or results. They involve risks, uncertainties and assumptions. Actual results may differ materially from those contemplated by the forward-looking statements due to, among others, the following factors:

•our ability to successfully implement our business plan for our assets and operations;

•governmental legislation and regulations;

•industry factors that influence the supply of and demand for crude oil, natural gas and NGLs;

•industry factors that influence the demand for services in the markets (particularly unconventional shale plays) in which we provide services;

•weather conditions;

•outbreak of illness, pandemic or any other public health crisis, including the COVID-19 pandemic;

•the availability of crude oil, natural gas and NGLs, and the price of those commodities, to consumers relative to the price of alternative and competing fuels;

•the availability of storage for hydrocarbons;

•the ability of members of the Organization of Petroleum Exporting Countries (OPEC) and other oil-producing countries to agree and maintain oil price and production controls;

•economic conditions;

•costs or difficulties related to the integration of acquisitions and success of our joint ventures’ operations;

•environmental claims;

•operating hazards and other risks incidental to the provision of midstream services, including gathering, compressing, treating, processing, fractionating, transporting and storing energy products (i.e., crude oil, NGLs and natural gas) and related products (i.e., produced water);

•interest rates;

•the price and availability of debt and equity financing, including our ability to raise capital through alternatives like joint ventures; and

•the ability to sell or monetize assets, to reduce indebtedness, to repurchase our equity securities, to make strategic investments, or for other general partnership purposes.

For additional factors that could cause actual results to be materially different from those described in the forward-looking statements, see Part I, Item 1A. Risk Factors of our 2020 Annual Report on Form 10-K and Part II, Item 1A. Risk Factors of this Quarterly Report on Form 10-Q.

Outlook and Trends

Our business objective is to create long-term value for our unitholders. We expect to create value for our investors by generating stable operating margins and improving cash flows from our diversified midstream operations by prudently

39

financing investments in our assets and expansions of our portfolio, maximizing throughput and optimizing services on our assets, and effectively controlling our capital expenditures, operating and administrative costs.

We have taken a number of strategic steps to better position the Company as a stronger, better capitalized company that can accretively grow cash flows and as an industry leader in Environmental, Social and Governance (ESG) efforts.

During 2021, CEQP paid Crestwood Holdings approximately $268 million to (i) acquire approximately 11.5 million CEQP common units, 0.4 million subordinated units of CEQP and 100% of the equity interests of Crestwood Marcellus Holdings LLC and Crestwood Gas Services Holdings LLC (whose assets consisted solely of CEQP common and subordinated units and 1% of the limited partner interests in Crestwood Holdings LP); and (ii) acquire the general partner and the remaining 99% limited partner interests of Crestwood Holdings LP (whose assets consist solely of its ownership interest in Crestwood Equity GP LLC, which owns CEQP’s non-economic general partner interest) (collectively the Crestwood Holdings Transactions). The purchase price was funded through borrowings under the Crestwood Midstream credit facility. The Crestwood Holdings Transactions resulted in CEQP retiring the common and subordinated units acquired from Crestwood Holdings.

The Crestwood Holdings Transactions were a significant step in our strategy to drive peer leading governance and set the stage for future growth by simplifying our organizational structure, increasing our public float and liquidity and enhancing our financial flexibility as we strive to generate long-term value for our unitholders. Additionally, in connection with the Crestwood Holdings Transactions, Crestwood Holdings repaid all of its outstanding debt which further enhances CEQP’s future flexibility around capital allocation priorities and eliminates any potential future risks around a change of control related to Crestwood Holdings’ debt as previously described in Part I, Item 1A. Risk Factors of our 2020 Annual Report on Form 10-K. In conjunction with the completion of the Crestwood Holdings Transactions, CEQP will transition to a traditional public company governance structure with a publicly elected board of directors beginning in 2022 which further ensures alignment between management and the Board of Directors with common unitholders and is consistent with our long-term ESG program.

To further enhance our financial flexibility and execute our long-term business strategy, in July 2021, Stagecoach Gas sold certain of its wholly-owned subsidiaries to a subsidiary of Kinder Morgan, Inc. (Kinder Morgan) for approximately $1.195 billion plus certain purchase price adjustments (Initial Closing) pursuant to a purchase and sale agreement dated as of May 31, 2021 between our wholly owned subsidiary, Crestwood Pipeline and Storage Northeast LLC (Crestwood Northeast), Con Edison Gas Pipeline and Storage Northeast, LLC (CEGP), a wholly owned subsidiary of Consolidated Edison, Inc., Stagecoach Gas and Kinder Morgan. Stagecoach Gas distributed to us approximately $614 million as our proportionate share of the gross proceeds received from the sale. Following the Initial Closing and subject to certain customary closing conditions, Crestwood Northeast and CEGP will sell each of their equity interests in Stagecoach Gas and its wholly-owned subsidiary, Twin Tier Pipeline LLC (Second Closing) to Kinder Morgan for approximately $30 million, subject to certain closing adjustments. We anticipate the Second Closing to occur either in the fourth quarter of 2021 or first quarter of 2022. The Stagecoach Gas divestiture enabled us to decrease our net debt to consolidated EBITDA ratio of our revolving credit facility below 3.5x at September 30. 2021, which should position us to utilize a greater portion of our cash flow going forward to increase returns to our unitholders through continued distributions, prudent capital investments around our higher-growth gathering and processing assets, and opportunistic repurchases of our preferred and common units under our approved $175 million unit repurchase program described below in “Liquidity and Sources of Capital”.

We continue to drive our long-term growth strategy through disciplined capital investments utilizing our current financial flexibility, and on October 25, 2021, we entered into a merger agreement with Oasis Midstream Partners LP (Oasis Midstream) under which we will acquire Oasis Midstream in an equity and cash transaction valued at approximately $1.8 billion. Pursuant to the merger agreement, Oasis Petroleum Inc. (Oasis Petroleum) will receive $150 million in cash plus 21.0 million newly issued CEQP common units in exchange for its 33.8 million common units held in Oasis Midstream. In addition, Oasis Midstream’s public unitholders will receive 12.9 million newly issued CEQP common units in exchange for the 14.8 million Oasis Midstream common units held by them. Additionally, under the merger agreement, Oasis Petroleum will receive a $10 million cash payment for its ownership of the general partner of Oasis Midstream. This transaction further solidifies Crestwood’s competitive position in the Williston Basin with exposure to approximately 1,200 drilling locations and 535,000 dedicated acres and expands the company’s relationship with Oasis Petroleum. Additionally, Oasis Midstream’s Wild Basin gathering and processing assets are highly complementary with our Arrow gathering system and Bear Den processing facility which provides for immediate opportunities to drive cost savings and commercial synergies and better utilization of available gas processing capacity.

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In addition to the strategic steps discussed above, we have also taken steps to (i) minimize capital expenditures to better align with development activity by our gathering and processing customers; (ii) realign our organization to reduce operating and administrative expenses; (iii) engage with our customers to maintain volumes across our asset portfolio; (iv) optimize our storage, transportation and marketing assets to take advantage of regional commodity price volatility; and (v) evaluate our debt and equity structure to preserve liquidity and ensure balance sheet strength. Given our efforts over the past few years to improve the partnership’s competitive position in the businesses we operate, manage costs and improve margins and create a stronger balance sheet, we believe the Company is well positioned to execute its business plan.

Recent Developments

Bakken DAPL Matter. In July 2020, a U.S. District Court (District Court) ordered the Dakota Access Pipeline (DAPL) to cease operation based on an alleged procedural permitting failure. On August 5, 2020, the U.S. Court of Appeals for the District of Columbia Circuit (D.C. Circuit) stayed the DAPL shutdown, and set an expedited briefing schedule to determine the merits of the District Court’s decision. The D.C. Circuit issued an opinion on January 26, 2021, which upheld the District Court’s decision on the merits, but did not rule on whether DAPL should be prohibited from continued operation. The plaintiffs sought another injunction against DAPL’s continued operation, which was denied by the District Court in May 2021. The U.S. Army Corps of Engineers is currently conducting an environmental impact statement, which is expected to be complete in 2022 and we expect that DAPL will remain in operation while the environmental impact statement is being completed.

The Arrow gathering system currently connects to the DAPL, Hiland, Tesoro and True Companies’ Bridger Four Bears pipelines, providing significant downstream delivery capacity for our Arrow customers. Additionally, we can transport Arrow crude volumes to our COLT Hub facility by pipeline or truck, which mitigates the impact to our producers with the ability to access multiple markets out of the basin.

Regulatory Matters

The Federal Energy Regulatory Commission (FERC) issued a Notice of Inquiry (NOI) on April 19, 2018 (2018 NOI) initiating a review of its policies on certification of natural gas pipelines, including an examination of its long-standing Policy Statement on Certification of New Interstate Natural Gas Pipeline Facilities (1999 Policy Statement), issued in 1999, that is used to determine whether to grant certificates for new pipeline projects. On February 18, 2021, the FERC issued another NOI (2021 NOI), reopening its review of the 1999 Policy Statement. Comments on the 2021 NOI were due on May 26, 2021, and although the FERC has not taken any further action regarding the 2018 NOI or 2021 NOI, we are unable to predict what, if any, changes may be proposed as a result of the NOIs that will affect our natural gas pipeline operations or when such proposals, if any, might become effective.

How We Evaluate Our Operations

We evaluate our overall business performance based primarily on EBITDA and Adjusted EBITDA. We do not utilize depreciation, amortization and accretion expense in our key measures because we focus our performance management on cash flow generation and our assets have long useful lives.

EBITDA and Adjusted EBITDA - We believe that EBITDA and Adjusted EBITDA are widely accepted financial indicators of a company’s operational performance and its ability to incur and service debt, fund capital expenditures and make distributions. We believe that EBITDA and Adjusted EBITDA are useful to our investors because it allows them to use the same performance measure analyzed internally by our management to evaluate the performance of our businesses and investments without regard to the manner in which they are financed or our capital structure. EBITDA is defined as income before income taxes, plus debt-related costs (interest and debt expense, net and loss on modification/extinguishment of debt) and depreciation, amortization and accretion expense. Adjusted EBITDA considers the adjusted earnings impact of our unconsolidated affiliates by adjusting our equity earnings or losses from our unconsolidated affiliates to reflect our proportionate share (based on the distribution percentage) of their EBITDA, excluding gains and losses on long-lived assets and other impairments. Adjusted EBITDA also considers the impact of certain significant items, such as unit-based compensation charges, gains or losses on long-lived assets, impairments of goodwill, third party costs incurred related to potential and completed acquisitions, certain environmental remediation costs, the change in fair value of commodity inventory-related derivative contracts, costs associated with the realignment and restructuring of our operations and corporate structure, and other transactions identified in a specific reporting period. The change in fair value of commodity inventory-related derivative contracts is considered in determining Adjusted EBITDA given that the timing of recognizing gains and losses on these derivative contracts differs from the recognition of revenue for the related underlying sale of inventory to which these derivatives relate. Changes in the fair value of other derivative contracts is not considered in determining Adjusted EBITDA given the relatively short-term nature of those

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derivative contracts. EBITDA and Adjusted EBITDA are not measures calculated in accordance with GAAP, as they do not include deductions for items such as depreciation, amortization and accretion, interest and income taxes, which are necessary to maintain our business. EBITDA and Adjusted EBITDA should not be considered as alternatives to net income, operating cash flow or any other measure of financial performance presented in accordance with GAAP. EBITDA and Adjusted EBITDA calculations may vary among entities, so our computation may not be comparable to measures used by other companies.

Results of Operations

The following tables summarize our results of operations (in millions):

	Crestwood Equity								Crestwood Midstream
	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
	2021		2020		2021		2020		2021		2020		2021		2020
Revenues	$	1,226.3	$	519.2	$	3,188.6	$	1,599.8	$	1,226.3	$	519.2	$	3,188.6	$	1,599.8
Costs of product/services sold	1,099.3		358.7		2,710.3		1,118.8		1,099.3		358.7		2,710.3		1,118.8
Operations and maintenance expense	31.6		31.0		90.2		100.2		31.6		31.0		90.2		100.2
General and administrative expense	25.9		19.6		67.4		64.0		24.4		18.5		61.3		60.4
Depreciation, amortization and accretion	64.6		60.8		182.6		177.9		68.2		64.2		193.2		188.4
Loss on long-lived assets, net	18.5		21.3		19.6		26.1		18.5		21.3		19.6		26.1
Goodwill impairment	—		—		—		80.3		—		—		—		80.3
Operating income (loss)	(13.6)		27.8		118.5		32.5		(15.7)		25.5		114.0		25.6
Earnings (loss) from unconsolidated affiliates, net	4.9		10.5		(125.9)		24.4		4.9		10.5		(125.9)		24.4
Interest and debt expense, net	(30.9)		(33.7)		(102.0)		(100.3)		(30.9)		(33.7)		(102.0)		(100.3)
Loss on modification/extinguishment of debt	—		—		(6.7)		—		—		—		(6.7)		—
Other income, net	0.1		—		0.2		0.2		—		—		—		—
(Provision) benefit for income taxes	(0.1)		—		(0.1)		0.1		(0.1)		—		(0.1)		0.2
Net income (loss)	(39.6)		4.6		(116.0)		(43.1)		(41.8)		2.3		(120.7)		(50.1)
Add:
Interest and debt expense, net	30.9		33.7		102.0		100.3		30.9		33.7		102.0		100.3
Loss on modification/extinguishment of debt	—		—		6.7		—		—		—		6.7		—
Provision (benefit) for income taxes	0.1		—		0.1		(0.1)		0.1		—		0.1		(0.2)
Depreciation, amortization and accretion	64.6		60.8		182.6		177.9		68.2		64.2		193.2		188.4
EBITDA	56.0		99.1		175.4		235.0		57.4		100.2		181.3		238.4
Unit-based compensation charges	12.9		8.1		22.8		17.3		12.9		8.1		22.8		17.3
Loss on long-lived assets, net	18.5		21.3		19.6		26.1		18.5		21.3		19.6		26.1
Goodwill impairment	—		—		—		80.3		—		—		—		80.3
(Earnings) loss from unconsolidated affiliates, net	(4.9)		(10.5)		125.9		(24.4)		(4.9)		(10.5)		125.9		(24.4)
Adjusted EBITDA from unconsolidated affiliates, net	9.8		20.4		56.5		57.6		9.8		20.4		56.5		57.6
Change in fair value of commodity inventory-related derivative contracts	46.8		(3.0)		48.9		12.7		46.8		(3.0)		48.9		12.7
Significant transaction and environmental related costs and other items	0.8		0.6		1.9		10.6		0.7		0.6		(0.4)		10.6
Adjusted EBITDA	$	139.9	$	136.0	$	451.0	$	415.2	$	141.2	$	137.1	$	454.6	$	418.6

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	Crestwood Equity								Crestwood Midstream
	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
	2021		2020		2021		2020		2021		2020		2021		2020
Net cash provided by operating activities	$	79.4	$	111.9	$	372.9	$	295.3	$	81.3	$	112.9	$	378.5	$	294.0
Net changes in operating assets and liabilities	(25.1)		(15.5)		(114.8)		(26.9)		(25.3)		(15.3)		(114.1)		(21.8)
Amortization of debt-related deferred costs	(1.7)		(1.7)		(5.1)		(4.9)		(1.7)		(1.7)		(5.1)		(4.9)
Interest and debt expense, net	30.9		33.7		102.0		100.3		30.9		33.7		102.0		100.3
Unit-based compensation charges	(12.9)		(8.1)		(22.8)		(17.3)		(12.9)		(8.1)		(22.8)		(17.3)
Loss on long-lived assets, net	(18.5)		(21.3)		(19.6)		(26.1)		(18.5)		(21.3)		(19.6)		(26.1)
Goodwill impairment	—		—		—		(80.3)		—		—		—		(80.3)
Earnings (loss) from unconsolidated affiliates, net, adjusted for cash distributions received	3.6		—		(137.5)		(5.4)		3.6		—		(137.5)		(5.4)
Deferred income taxes	0.3		0.1		0.4		0.4		—		—		—		0.1
Provision (benefit) for income taxes	0.1		—		0.1		(0.1)		0.1		—		0.1		(0.2)
Other non-cash income	(0.1)		—		(0.2)		—		(0.1)		—		(0.2)		—
EBITDA	56.0		99.1		175.4		235.0		57.4		100.2		181.3		238.4
Unit-based compensation charges	12.9		8.1		22.8		17.3		12.9		8.1		22.8		17.3
Loss on long-lived assets, net	18.5		21.3		19.6		26.1		18.5		21.3		19.6		26.1
Goodwill impairment	—		—		—		80.3		—		—		—		80.3
(Earnings) loss from unconsolidated affiliates, net	(4.9)		(10.5)		125.9		(24.4)		(4.9)		(10.5)		125.9		(24.4)
Adjusted EBITDA from unconsolidated affiliates, net	9.8		20.4		56.5		57.6		9.8		20.4		56.5		57.6
Change in fair value of commodity inventory-related derivative contracts	46.8		(3.0)		48.9		12.7		46.8		(3.0)		48.9		12.7
Significant transaction and environmental related costs and other items	0.8		0.6		1.9		10.6		0.7		0.6		(0.4)		10.6
Adjusted EBITDA	$	139.9	$	136.0	$	451.0	$	415.2	$	141.2	$	137.1	$	454.6	$	418.6

Segment Results

The following table summarizes the EBITDA of our segments (in millions):

	Three Months Ended						Three Months Ended
	September 30, 2021						September 30, 2020
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics
Revenues	$	171.2	$	2.0	$	1,053.1	$	145.2	$	3.5	$	370.5
Intersegment revenues	125.6		2.3		(127.9)		44.9		1.9		(46.8)
Costs of product/services sold	150.1		(0.2)		949.4		63.2		—		295.5
Operations and maintenance expenses	19.5		1.5		10.6		19.4		0.7		10.9
Loss on long-lived assets, net	(18.5)		—		—		(19.1)		—		(2.4)
Earnings from unconsolidated affiliates, net	4.2		0.7		—		0.5		10.0		—
EBITDA	$	112.9	$	3.7	$	(34.8)	$	88.9	$	14.7	$	14.9

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	Nine Months Ended						Nine Months Ended
	September 30, 2021						September 30, 2020
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics
Revenues	$	498.9	$	6.0	$	2,683.7	$	474.6	$	10.1	$	1,115.1
Intersegment revenues	315.1		7.8		(322.9)		99.2		6.9		(106.1)
Costs of product/services sold	387.2		(0.2)		2,323.3		192.8		0.3		925.7
Operations and maintenance expenses	55.6		3.1		31.5		65.7		2.8		31.7
Gain (loss) on long-lived assets, net	(19.7)		—		0.1		(23.7)		—		(2.6)
Goodwill impairment	—		—		—		(80.3)		—		—
Earnings (loss) from unconsolidated affiliates, net	4.4		(130.3)		—		0.3		24.1		—
EBITDA	$	355.9	$	(119.4)	$	6.1	$	211.6	$	38.0	$	49.0

Below is a discussion of the factors that impacted EBITDA by segment for the three and nine months ended September 30, 2021 compared to the same periods in 2020.

Gathering and Processing

EBITDA for our gathering and processing segment increased by approximately $24.0 million and $144.3 million during the three and nine months ended September 30, 2021 compared to the same periods in 2020. Our gathering and processing segment’s EBITDA for the three and nine months ended September 30, 2021 and 2020 were impacted by losses we recorded related to our long-lived assets, which are further described below, and an $80.3 million goodwill impairment recorded during the nine months ended September 30, 2020 related to our Jackalope operations (see Item 1. Financial Statements, Note 2 for a further discussion of this impairment).

Our gathering and processing segment’s revenues increased by approximately $106.7 million and $240.2 million during the three and nine months ended September 30, 2021 compared to the same periods in 2020, while our costs of product/services sold increased by approximately $86.9 million and $194.4 million during those same periods. The increases were primarily driven by higher volumes on our Arrow system (described below) and higher average prices (i.e., more than an 75% increase in commodity prices during the three months ended September 30, 2021 compared to the same period in 2020) that our gathering and processing segment realized on its agreements under which it purchases and sells crude oil, natural gas and NGLs during the three and nine months ended September 30, 2021 compared to the same periods in 2020. During the three months ended September 30, 2021, Arrow’s natural gas gathering and processing volumes increased by 17% and 14%, respectively and during the nine months ended September 30, 2021, Arrow’s natural gas gathering and processing volumes increased by 27% and 28%, respectively, compared to the same periods in 2020. Also contributing to the increase in our gathering and processing segment’s revenues and costs of product/services sold were higher gathering and processing volumes on our Jackalope system during the three months ended September 30, 2021 compared to the same period in 2020, primarily due to its major customer bringing production back online during late 2020 and early 2021. During the three months ended September 30, 2021, Jackalope’s natural gas gathering and processing volumes increased by 41% and 37%, respectively. Partially offsetting the increase in our gathering and processing segment’s revenues for the nine months ended September 30, 2021 were lower revenues from our Fayetteville operations due to the sale of these assets in October 2020.

Our gathering and processing segment’s operations and maintenance expenses decreased by approximately $10.1 million during the nine months ended September 30, 2021 compared to the same period in 2020, primarily due to the sale of our Fayetteville assets in October 2020 and efforts we undertook starting in the second quarter of 2020 to reduce costs in response to lower commodity prices during that period. Our gathering and processing segment’s operations and maintenance expenses were relatively flat during the three months ended September 30, 2021 compared to the same period in 2020.

Our gathering and processing segment’s EBITDA was impacted by a loss on long-lived assets of approximately $19 million during the three and nine months ended September 30, 2021 related to the abandonment and dismantlement of certain of our Marcellus West Union compressor station assets. For a further discussion on the abandonment and dismantlement of our Marcellus West Union compressor station assets, see Item 1. Financial Statements, Note 2. Our gathering and processing segment’s EBITDA for the three and nine months ended September 30, 2020 was impacted by a loss on long-lived assets of approximately $19.9 million related to the sale of our Fayetteville assets in October 2020. In addition, during the nine months

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ended September 30, 2020, we recorded a loss on long-lived assets of approximately $2.7 million related to the retirement of certain water gathering lines on our Arrow system.

Our gathering and processing segment’s EBITDA was also impacted by an increase in equity earnings of approximately $4 million from our Crestwood Permian equity investment during both the three and nine months ended September 30, 2021 compared to the same periods in 2020. During the three and nine months ended September 30, 2021, Crestwood Permian experienced an increase in its natural gas gathering and processing revenues and volumes primarily due to its customers connecting more wells to its system during 2021 as a result of the increases in commodity prices compared to the same periods in 2020. During the nine months ended September 30, 2021, Crestwood Permian experienced an increase in its water gathering revenues and volumes compared to the same period in 2020 primarily due to placing in-service its produced water gathering and disposal system in late second quarter of 2020. Partially offsetting these increases during the nine months ended September 30, 2021 were higher electricity costs experienced during the first quarter of 2021 due to the unusual weather conditions experienced during that period.

Storage and Transportation

EBITDA for our storage and transportation segment decreased by approximately $11.0 million and $157.4 million during the three and nine months ended September 30, 2021 compared to the same periods in 2020. Our EBITDA for the three and nine months ended September 30, 2021 was impacted by a reduction to the equity earnings from our Stagecoach Gas investment as further discussed below.

During the both the three and nine months ended September 30, 2021, COLT’s rail loading volumes decreased by 4% compared to the same periods in 2020 due to lower demand for rail loading services which resulted in a decrease in revenues of approximately $1.1 million and $3.2 million. Our storage and transportation segment’s costs of product/services sold and operations and maintenance expenses were relatively flat during the three and nine months ended September 30, 2021 compared to the same periods in 2020.

Our storage and transportation segment’s EBITDA was also impacted by a net decrease in earnings from unconsolidated affiliates during both the three and nine months ended September 30, 2021 compared to the same periods in 2020. In July 2021, Stagecoach Gas sold certain of its wholly-owned subsidiaries to a subsidiary of Kinder Morgan, which resulted in a decrease in equity earnings from our Stagecoach Gas equity investment of approximately $9.0 million during the three months ended September 30, 2021 compared to the same period in 2020 due to our 2021 results not reflecting a full quarter of equity earnings from the Stagecoach Gas assets which were sold. During the nine months ended September 30, 2021, our earnings from our Stagecoach Gas equity investment were reduced by approximately $155.4 million as a result of recording our proportionate share of a loss on long-lived assets (including goodwill) recorded by our Stagecoach Gas equity investment related to the sale of Stagecoach Gas. In addition, our earnings from unconsolidated affiliates during the nine months ended September 30, 2021 were also reduced by our proportionate share of transaction costs of approximately $3.0 million related to the sale of the Stagecoach Gas equity investment. For a further discussion of these matters, see Item 1. Financial Statements, Note 5. During the nine months ended September 30, 2021, earnings from our Tres Holdings equity investment increased by approximately $8.9 million compared to the same period in 2020, primarily due to higher revenues from gas inventory sales and an increase in demand for its storage and transportation services due to the unusually cold weather experienced during early 2021 compared to 2020. During the nine months ended September 30, 2021, earnings from our PRBIC equity investment increased by $4.4 million compared to the same period in 2020, primarily as a result of recording our proportionate share of a loss on long-lived assets impairment recorded by our PRBIC equity investment during 2020.

Marketing, Supply and Logistics

EBITDA for our marketing, supply and logistics segment decreased by approximately $49.7 million and $42.9 million during the three and nine months ended September 30, 2021 compared to the same periods in 2020, which was driven primarily by unrealized losses on our price risk management activities during 2021, which is further described below. Our marketing, supply and logistics segment’s revenues increased by approximately $601.5 million and $1,351.8 million during the three and nine months ended September 30, 2021 compared to the same periods in 2020, while our costs of product/services sold increased by $653.9 million and $1,397.6 million during those same periods.

Our NGL marketing and logistics operations experienced an increase in revenues of approximately $415.5 million and $892.6 million during the three and nine months ended September 30, 2021 compared to the same periods in 2020, and an increase in its costs of product/services of approximately $464.1 million and $938.9 million during those same periods. These increases were primarily due to increases in NGL prices during 2021 compared to 2020 as a result of overall increases in commodity

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prices and the unusually cold weather experienced during early 2021 compared to 2020. Our NGL marketing and logistics operations’ costs of product/services sold increased more than its revenues primarily due to the impact that the significant increase in crude, natural gas and NGL commodity prices (described above) had on our price risk management activities that primarily hedged our company-wide commodity exposures during 2021. Included in our costs of product/services sold was a loss of $53.4 million and $94.8 million during the three and nine months ended September 30, 2021, and a loss of $1.8 million and a gain of $13.4 million during the three and nine months ended September 30, 2020 related to our price risk management activities. Partially offsetting the impact of our price risk management activities was the impact of the operating results of the NGL assets acquired from Plains All American Pipeline, L.P. (Plains) in April 2020, which increased our ability to capture additional opportunities in the markets in which these assets operate.

Our crude and natural gas marketing operations experienced an increase in its revenues of approximately $186.0 million and $459.2 million during the three and nine months ended September 30, 2021 compared to the same periods in 2020, and an increase in its product costs of approximately $189.8 million and $458.7 million during those same periods. These increases were driven primarily driven by an increase in marketing activity surrounding our crude-related operations primarily in the Bakken as a result of higher commodity prices and an increase in marketing activity surrounding our natural-gas related operations driven by unusual winter weather conditions experience during early 2021.

Other EBITDA Results

General and Administrative Expenses. During the three months ended September 30, 2021, our general and administrative expenses increased by approximately $6 million compared to the same period in 2020, primarily due to higher unit-based compensation charges driven by higher average awards outstanding under our long-term incentive plans. Crestwood Midstream’s general and administrative expenses were relatively flat during the nine months ended September 30, 2021 compared to the same period in 2020 due to the impact of cost reductions we under took beginning in the second quarter of 2020. Crestwood Equity’s general and administrative expenses increased by approximately $3.4 million during the nine months ended September 30, 2021 compared to the same period in 2020 due to transaction costs that were expensed related to the Crestwood Holdings Transactions discussed in Item 1. Financial Statements, Note 1.

Items not affecting EBITDA include the following:

Depreciation, Amortization and Accretion Expense. During the three and nine months ended September 30, 2021 compared to the same periods in 2020, our depreciation, amortization and accretion expense increased by approximately $4 million and $5 million, respectively, primarily due to acquisition of the NGL assets acquired from Plains in April 2020, placing in-service the expansion of our processing capacity at our Bucking Horse processing facility on our Powder River Basin system in early 2020, and the expansion of our gathering and processing facilities at our Arrow system. Partially offsetting these increases was lower depreciation, amortization and accretion expense due to the sale of our Fayetteville assets in late 2020.

Interest and Debt Expense, Net. Interest and debt expense, net decreased by approximately $2.8 million during the three months ended September 30, 2021 compared to the same period in 2020, primarily due to lower average outstanding balances on our Crestwood Midstream credit facility. During the nine months ended September 30, 2021, our interest and debt expense, net increased by approximately $1.7 million compared to the same period in 2020, primarily due to the issuance of $700 million unsecured senior notes in January 2021 and lower capitalized interest period over period due to the timing of growth capital projects primarily in the Powder River Basin, partially offset by lower average outstanding balances on our Crestwood Midstream credit facility.

The following table provides a summary of interest and debt expense (in millions):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Credit facility	$	3.1	$	5.5	$	12.0	$	18.0
Senior notes	26.1		26.6		82.9		79.7
Other	1.8		1.7		7.4		5.3
Gross interest and debt expense	31.0		33.8		102.3		103.0
Less: capitalized interest	0.1		0.1		0.3		2.7
Interest and debt expense, net	$	30.9	$	33.7	$	102.0	$	100.3

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Loss on Extinguishment of Debt. During the nine months ended September 30, 2021, we recognized a loss on extinguishment of debt of approximately $6.7 million in conjunction with the redemption of our 2023 Senior Notes.

Liquidity and Sources of Capital

Crestwood Equity is a holding company that derives all of its operating cash flow from its operating subsidiaries.  Our principal sources of liquidity include cash generated by operating activities from our subsidiaries, distributions from our joint ventures, borrowings under the Crestwood Midstream credit facility, and sales of equity and debt securities. Our equity investments use cash from their respective operations and contributions from us to fund their operating activities, maintenance and growth capital expenditures, and service their outstanding indebtedness. We believe our liquidity sources and operating cash flows are sufficient to address our future operating, debt service and capital requirements.

We make quarterly cash distributions to our common unitholders within approximately 45 days after the end of each fiscal quarter in an aggregate amount equal to our available cash for such quarter. On October 14, 2021, we declared a quarterly cash distribution of $0.625 per unit to our common unitholders, which will be paid on November 12, 2021 and was consistent with the distribution paid in August 2021. Based on our financial performance during the nine months ended September 30, 2021, and our estimates of our financial performance for future quarters, we believe the current level of distributions is appropriate. As described above, the Crestwood Holdings Transactions resulted in Crestwood Equity acquiring and cancelling approximately 11.5 million common units, which decreased our anticipated annual distributions (at the current annual rate of $2.50 per unit) by approximately $29 million per year and eliminates any future consideration by our board of directors regarding the level of distributions to our unitholders of any risks created by Crestwood Holdings’ debt (which was fully repaid as of September 30, 2021). We also pay quarterly cash distributions of approximately $15 million to our preferred unitholders and beginning with the first quarter of 2021, we pay quarterly cash distributions of approximately $10 million to Crestwood Niobrara’s non-controlling partner. We believe our operating cash flows will exceed cash distributions to our partners, preferred unitholders and non-controlling partner, and as a result, we will have adequate operating cash flows as a source of liquidity for our growth capital expenditures.

In March 2021, Crestwood Equity’s board of directors authorized a $175 million common unit and preferred unit repurchase program effective through December 31, 2022. Pursuant to the program, we may purchase common and preferred units from time to time in the open market in accordance with applicable securities laws at current market prices. The timing and amount of purchases under the program will be determined based on growth capital opportunities, financial performance and outlook, and other factors, including acquisition opportunities and market conditions. The unit repurchase program does not obligate us to purchase any specific dollar amount or number of units and may be suspended or discontinued at any time.

As of September 30, 2021, we had $985.3 million of available capacity under the Crestwood Midstream credit facility considering the most restrictive debt covenants in the credit agreement. As of September 30, 2021, we were in compliance with all of our debt covenants applicable to the credit facility and senior notes. We may from time to time seek to retire or purchase our outstanding debt through cash purchases and/or exchanges for equity securities, in open market purchases, privately negotiated transactions, tender offers or otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions and other factors. The amounts involved may be material. During the nine months ended September 30, 2021, we redeemed and cancelled approximately $687.2 million of principal outstanding under the 2023 Senior Notes, utilizing a portion of the proceeds from the issuance of the 2029 Senior Notes and borrowings under our Crestwood Midstream credit facility. In July 2021, Stagecoach Gas closed on the sale of certain of its wholly-owned subsidiaries to a subsidiary of Kinder Morgan and distributed to us approximately $614 million as our proportionate share of the gross proceeds received from the sale. We utilized approximately $3 million of these proceeds to pay transaction costs related to the sale described above, $40 million of these proceeds to pay our contingent consideration obligation and related accrued interest, and the remainder of these proceeds to repay a portion of the amounts outstanding under the Crestwood Midstream credit facility.

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Cash Flows

The following table provides a summary of Crestwood Equity’s cash flows by category (in millions):

	Nine Months Ended
	September 30,
	2021		2020
Net cash provided by operating activities	$	372.9	$	295.3
Net cash provided by (used in) investing activities	$	582.9	$	(297.7)
Net cash used in financing activities	$	(955.5)	$	(8.8)

Operating Activities

Our operating cash flows increased by approximately $77.6 million during the nine months ended September 30, 2021 compared to the same period in 2020. The increase was primarily driven by an increase in net cash inflow from working capital of approximately $87.9 million, driven mostly by the sale of higher levels of NGL inventory at the close of the winter season during the nine months ended September 30, 2021 compared to the same period in 2020 due to increased activity primarily from the NGL assets acquired from Plains during the second quarter of 2020. Partially offsetting this net increase was higher costs of product/services sold of approximately $1,591.5 million, partially offset by higher operating revenues of approximately $1,588.8 million primarily from our marketing, supply and logistics segment and gathering and processing segment as discussed in Results of Operations above. In addition, during the nine months ended September 30, 2021, our equity earnings from our Stagecoach Gas equity investment were lower due to the sale of certain of its assets in July 2021 which resulted in a reduction in our net operating cash flows compared to the same period in 2020.

Investing Activities

Capital Expenditures. The energy midstream business is capital intensive, requiring significant investments for the acquisition or development of new facilities. We categorize our capital expenditures as either:

•growth capital expenditures, which are made to construct additional assets, expand and upgrade existing systems, or acquire additional assets; or

•maintenance capital expenditures, which are made to replace partially or fully depreciated assets, to maintain the existing operating capacity of our assets, extend their useful lives or comply with regulatory requirements.

Our growth capital expenditures during the year will increase the services we can provide to our customers and the operating efficiencies of our systems. We expect to finance our capital expenditures with a combination of cash generated by our operating subsidiaries, distributions received from our equity investments and borrowings under our credit facility. Additional commitments or expenditures will be made at our discretion, and any discontinuation of these construction projects could result in less future operating cash flows and earnings.

The following table summarizes our capital expenditures for the nine months ended September 30, 2021 (in millions):

Growth capital (1)	$	40.9
Maintenance capital	13.1
Other (2)	1.8
Purchases of property, plant and equipment	$	55.8

(1)Includes $19.5 million paid related to outstanding litigation on the construction of the Bear Den II cryogenic processing plant.

(2)Represents purchases of property, plant and equipment that are reimbursable by third parties.

Investments in Unconsolidated Affiliates. During the nine months ended September 30, 2021 and 2020, we contributed approximately $6.9 million and $6.0 million to our Tres Holdings equity investment for its operating purposes. During the nine months ended September 30, 2021, we contributed approximately $3.3 million to our Crestwood Permian equity investment primarily to fund its expansion projects. During the nine months ended September 30, 2021, we received a distribution from Stagecoach Gas of approximately $614 million, which represented our proportionate share of the gross proceeds received by Stagecoach Gas related to the sale of certain of its assets to Kinder Morgan as discussed above.

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Financing Activities

The following equity and debt transactions impacted our financing activities during the nine months ended September 30, 2021:

Equity and Debt Transactions

•During the nine months ended September 30, 2021, CEQP paid approximately $275.6 million in conjunction with the Crestwood Holdings Transactions;

•During the nine months ended September 30, 2021, distributions to our partners decreased by approximately $11.7 million compared to the same period in 2020, primarily due to the decrease in common units outstanding as a result of the Crestwood Holdings Transactions;

•During the nine months ended September 30, 2021, we paid approximately $690.5 million to repurchase and cancel approximately $687.2 million of our senior notes due 2023;

•During the nine months ended September 30, 2021, we received net proceeds of approximately $691 million from the issuance of our senior notes due 2029; and

•During the nine months ended September 30, 2021, our other debt-related transactions resulted in net repayments of approximately $471.1 million compared to net proceeds of approximately $215.9 million during the same period in 2020.

Guarantor Summarized Financial Information

Crestwood Midstream and Crestwood Midstream Finance Corp. are issuers of our debt securities (the Issuers). Crestwood Midstream is a holding company and owns no operating assets and has no significant operations independent of its subsidiaries. Crestwood Midstream Finance Corp. is Crestwood Midstream’s 100% owned subsidiary and has no material assets or operations other than those related to its service as co-issuer of our senior notes. Obligations under Crestwood Midstream’s senior notes and its credit facility are jointly and severally guaranteed by substantially all of its subsidiaries (collectively, the Guarantor Subsidiaries), except for Crestwood Infrastructure Holdings LLC, Crestwood Niobrara LLC, Crestwood Pipeline and Storage Northeast LLC, Powder River Basin Industrial Complex LLC, and Tres Palacios Holdings LLC and their respective subsidiaries (collectively, Non-Guarantor Subsidiaries). The assets and credit of our Non-Guarantor Subsidiaries are not available to satisfy the debts of the Issuers or Guarantor Subsidiaries, and the liabilities of our Non-Guarantor Subsidiaries do not constitute obligations of the Issuers or Guarantor Subsidiaries. For additional information regarding our credit facility and senior notes and related guarantees, see our 2020 Annual Report on Form 10-K and Item 1. Financial Statements, Note 8 of this Quarterly Report on Form 10-Q.

The following tables provide summarized financial information for the Issuers and Guarantor Subsidiaries (collectively, the Obligor Group) on a combined basis after elimination of significant intercompany balances and transactions between entities in the Obligor Group. The investment balances in the Non-Guarantor Subsidiaries have been excluded from the supplemental summarized combined financial information. Transactions with other related parties, including the Non-Guarantor Subsidiaries, represent affiliate transactions and are presented separately in the summarized combined financial information below.

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Summarized Combined Balance Sheet Information (in millions)

	September 30, 2021		December 31, 2020
Current assets	$	615.9	$	371.3
Current assets - affiliates	$	5.8	$	1.1
Property, plant and equipment, net	$	2,215.9	$	2,295.2
Non-current assets	$	657.4	$	696.2
Current liabilities	$	752.4	$	345.4
Current liabilities - affiliates	$	16.8	$	5.0
Long-term debt, less current portion	$	2,024.9	$	2,483.8
Non-current liabilities	$	144.1	$	157.4

Summarized Combined Statement of Operations Information (in millions)

	Nine Months Ended September 30, 2021
Revenues	$	3,105.2
Revenues - affiliates	$	28.3
Cost of products/services sold	$	2,603.0
Cost of products/services sold - affiliates	$	101.3
Operations and maintenance expenses(1)	$	76.2
General and administrative expenses, net(2)	$	61.3
Operating income	$	121.5
Net income	$	14.8

(1)    We have operating agreements with certain of our 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 nine months ended September 30, 2021, we charged $23.9 million to our affiliates under these agreements.

(2)    Includes $19.8 million of net general and administrative expenses that were charged by our affiliates to us.

Item 3.Quantitative and Qualitative Disclosures About Market Risk

Our interest rate risk and commodity price, market and credit risks are discussed in our 2020 Annual Report on Form 10-K. There have been no material changes in those exposures from December 31, 2020 to September 30, 2021.

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Item 4.Controls and Procedures

Disclosure Controls and Procedures

As of September 30, 2021, Crestwood Equity and Crestwood Midstream carried out an evaluation under the supervision and with the participation of their respective management, including the Chief Executive Officer and Chief Financial Officer of their General Partners, as to the effectiveness, design and operation of our disclosure controls and procedures (as defined in the Securities Exchange Act of 1934, as amended (Exchange Act) Rules 13a-15(e) and 15d-15(e)). Crestwood Equity and Crestwood Midstream maintain controls and procedures designed to provide reasonable assurance that information required to be disclosed in their respective reports that are filed or submitted under the Exchange Act of 1934, as amended, are recorded, processed, summarized and reported within the time periods specified by the rules and forms of the SEC, and that information is accumulated and communicated to their respective management, including the Chief Executive Officer and Chief Financial Officer of their General Partners, as appropriate, to allow timely decisions regarding required disclosure. Such management, including the Chief Executive Officer and Chief Financial Officer of their General Partners, do not expect that the disclosure controls and procedures or the internal controls will prevent and/or detect all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Crestwood Equity’s and Crestwood Midstream’s disclosure controls and procedures are designed to provide reasonable assurance of achieving their objectives and the Chief Executive Officer and Chief Financial Officer of their General Partners concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of September 30, 2021.

Changes in Internal Control over Financial Reporting

There were no changes to Crestwood Equity’s or Crestwood Midstream’s internal control over financial reporting during the three months ended September 30, 2021 that have materially affected, or are reasonably likely to materially affect Crestwood Equity’s or Crestwood Midstream’s internal control over financial reporting.

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PART II – OTHER INFORMATION

Item 1.Legal Proceedings

Part I, Item 1. Financial Statements, Note 9 to the Consolidated Financial Statements, of this Form 10-Q is incorporated herein by reference.

Item 1A.Risk Factors

Our business faces many risks. Any of the risks discussed below or elsewhere in this Form 10-Q or our other SEC filings could have a material impact on our business, financial position or results of operations. Additional risks and uncertainties not presently known to us or that we currently believe to be immaterial may also impair our business operations. For a detailed discussion of the risk factors that should be understood by any investor contemplating investment in our common units, see Part I, Item 1A. Risk Factors in our 2020 Annual Report on Form 10-K, as supplemented by the risk factors set forth below. There has been no material change in the risk factors set forth in our 2020 Annual Report on Form 10-K other than those set forth below.

Terrorist attacks or “cyber security” events, or the threat of them, may adversely affect our business.

The U.S. government has issued public warnings that indicate that pipelines and other assets might be specific targets for terrorist organizations or “cyber security” events.  These potential targets might include our pipeline systems or operating systems and may affect our ability to operate or control our pipeline assets or utilize our customer service systems. Also, destructive forms of protests and opposition by extremists and other disruptions, including acts of sabotage or eco-terrorism, against oil and natural gas development and production or midstream processing or transportation activities could potentially result in damage or injury to persons, property or the environment or lead to extended interruptions of our or our customers’ operations. Additionally, the oil and natural gas industry has become increasingly dependent on digital technologies to conduct certain processing and operational activities. At the same time, companies in our industry have been the targets of cyber-attacks and ransomware demands, and it is possible that the attacks in our industry will continue and grow in number. In addition, to assist in conducting our business, we rely on information technology systems and data hosting facilities, including systems and facilities that are hosted by third parties and with respect to which we have limited visibility and control. These systems and facilities may be vulnerable to a variety of evolving cyber security risks or information security breaches, including unauthorized access, denial-of-service attacks, malicious software, data privacy breaches by employees, insiders or others with authorized access, cyber or phishing-attacks, ransomware, malware, social engineering, physical breaches or other actions. These cyber security risks could result in the unauthorized release, gathering, monitoring, misuse, loss or destruction of proprietary, personal data and other information, or other disruption of our business operations. In addition, certain cyber incidents, such as advanced persistent threats, may remain undetected for an extended period. The occurrence of any of these events, including any attack or threat targeted at our pipelines and other assets, could cause a substantial decrease in revenues, increased costs or other financial losses, exposure or loss of customer information, damage to our reputation or business relationships, increased regulation or litigation, disruption of our operations and/or inaccurate information reported from our operations.  These developments may subject our operations to increased risks, as well as increased costs, and, depending on their ultimate magnitude, could have a material adverse effect on our business, results of operations and financial condition. Although we have adopted controls and systems, including updating our systems with recent patches and updates from our software providers and procuring limited insurance for certain cyber-related losses, that are designed to protect information and mitigate the risk of data loss and other cyber security events, such measures cannot entirely eliminate cyber security threats, particularly as these threats continue to evolve and grow. Furthermore the controls and systems we have installed may be breached or be inadequate to address a risk that arises. We are not aware of any cyber security events that impacted our company that have or could have resulted in a material loss; however there is no assurance that such a breach has not already occurred and we are unaware of it, and that we will not suffer such a loss in the future.

We are or may become subject to cyber security and data privacy laws, regulations, litigation and directives relating to our processing of personal data.

Several jurisdictions in which we operate throughout the United States may have laws governing how we must respond to a cyber incident that results in the unauthorized access, disclosure or loss of personal data. Additionally, new laws and regulations governing cybersecurity, data privacy and unauthorized disclosure of confidential information, including international comprehensive data privacy regulations and recent U.S. state legislation in California, Virginia and Colorado (some of which, among other things, provides for a private right of action), pose increasingly complex compliance challenges

52

and could potentially elevate our costs over time. Our business involves collection, uses and other processing of personal data of our employees, contractors, suppliers and service providers. As legislation continues to develop and cyber incidents continue to evolve, we will likely be required to expend significant resources to continue to modify or enhance our protective measures to comply with such legislation and to detect, investigate and remediate vulnerabilities to cyber incidents and report any cyber incidents to the applicable regulatory authorities. In particular, in response to recent ransomware attacks, the Department of Homeland Security has issued a security directive to certain pipeline companies requiring the companies to appoint personnel, perform cybersecurity assessments, and report incidents and other information. Any failure by us, or a company we acquire, to comply with such laws and regulations could result in reputational harm, loss of goodwill, penalties, liabilities, and/or mandated changes in our business practices.

Item 2.Unregistered Sales of Equity Securities and Use of Proceeds

On March 30, 2021, Crestwood Gas Services Holdings LLC, a company controlled by an investment fund sponsored by First Reserve, closed on a private placement of six million common units representing limited partner interests of CEQP for gross proceeds of $132 million. CEQP did not sell any common units and did not receive any proceeds from the private placement. The securities offered in the private placement were not registered under the Securities Act of 1933, as amended or any state securities laws, and were sold in reliance upon the exemption provided in Section 4(a)(7) of the Securities Act of 1933.

The table below presents the CEQP’s common unit repurchase activity for the nine months ended September 30, 2021:

	Total Number of Units Repurchased(1)	Weighted-Average Price Paid Per Unit		Units Purchased as Part of Publicly Announced Programs	Maximum Dollar Value That May Yet Be Repurchased Under the Program(2)
January 1, 2021 - January 31, 2021	—	$	—	—	$	—
February 1, 2021 - February 28, 2021	—	—		—	—
March 1, 2021 - March 31, 2021	11,469,911	22.49		—	175,000,000
April 1, 2021 - April 30, 2021	—	—		—	—
May 1, 2021 - May 31, 2021	—	—		—	—
June 1, 2021 - June 30, 2021	—	—		—	—
July 1, 2021 - July 31, 2021	—	—		—	—
August 1, 2021 - August 31, 2021	—	—		—	—
September 1, 2021 - September 31, 2021	—	—		—	—
Totals / Weighted Average	11,469,911	$	22.49	—	$	175,000,000

(1)All units repurchased during the nine months ended September 30, 2021 were purchased pursuant to the Crestwood Holdings Transactions described in Part I, Item 1. Financial Statements, Note 1.

(2)On March 25, 2021, CEQP’s board of directors approved a plan to repurchase common and preferred units in one or more open-market transactions or in privately negotiated transactions, with an aggregate purchase price not to exceed $175 million exclusive of any fees, commissions or other expenses. The repurchase program expires December 31, 2022. No units have been purchased under the program during the nine months ended September 30, 2021.

Item 3.Defaults Upon Senior Securities

None.

Item 4.Mine Safety Disclosures

Not applicable.

Item 5.Other Information

None.

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Item 6.Exhibits

Exhibit Number	Description
2.1	Purchase and Sale Agreement, dated as of May 31, 2021 among Con Edison Gas Pipeline and Storage Northeast, LLC, Crestwood Pipeline and Storage Northeast LLC, as the Sellers, Stagecoach Gas Services LLC as the Company, Kinder Morgan Operating LLC “A” as Buyer, Con Edison Transmission, Inc. (solely for the limited purposes set forth therein) and Crestwood Midstream Partners LP (solely for the limited purposes set forth therein) (incorporated by reference to Exhibit 2.1 to Crestwood Equity Partners LP’s Form 8-K filed on June 1, 2021)
3.1	Certificate of Limited Partnership of Inergy, L.P. (incorporated by reference to Exhibit 3.1 to Inergy, L.P.'s Registration Statement on Form S-1 filed on March 14, 2001)
3.2	Certificate of Correction of Certificate of Limited Partnership of Inergy, L.P. (incorporated by reference to Exhibit 3.1 to Inergy, L.P.'s Form 10-Q filed on May 12, 2003)
3.3	Amendment to the Certificate of Limited Partnership of Crestwood Equity Partners LP (the “Company”) (f/k/a Inergy, L.P.) dated as of October 7, 2013 (incorporated herein by reference to Exhibit 3.2 to Crestwood Equity Partners LP's Form 8-K filed on October 10, 2013)
3.4	Certificate of Formation of Inergy GP, LLC (incorporated by reference to Exhibit 3.5 to Inergy, L.P.'s Registration Statement on Form S-1/A filed on May 7, 2001)
3.5	Certificate of Amendment of Crestwood Equity GP LLC (the “General Partner”) (f/k/a Inergy GP, LLC) dated as of October 7, 2013 (incorporated by reference to Exhibit 3.3A to Crestwood Equity Partners LP's Form 10-Q filed on November 8, 2013)
3.6	First Amended and Restated Limited Liability Company Agreement of Inergy GP, LLC dated as of September 27, 2012 (incorporated by reference to Exhibit 3.1 to Inergy, L.P.'s Form 8-K filed on September 27, 2012)
3.7	Amendment No. 1 to the First Amended and Restated Limited Liability Company Agreement of the General Partner entered into and effective as of October 7, 2013 (incorporated by reference to Exhibit 3.4A to Crestwood Equity Partners LP's Form 10-Q filed on November 8, 2013)
3.8	Fifth Amended and Restated Agreement of Limited Partnership of Crestwood Equity Partners LP dated as of April 11, 2014 (incorporated herein by reference to Exhibit 3.1 to Crestwood Equity Partners LP's Form 8-K filed on April 11, 2014)
3.9	First Amendment to the Fifth Amended and Restated Agreement of Limited Partnership of Crestwood Equity Partners LP entered into and effective as of September 30, 2015 (incorporated by reference to Exhibit 3.1 to Crestwood Equity Partner LP’s Form 8-K filed on October 1, 2015)
3.10	Second Amendment to the Fifth Amended and Restated Agreement of Limited Partnership of Crestwood Equity Partners LP entered into and effective as of November 8, 2017 (incorporated by reference to Exhibit 3.1 to Crestwood Equity Partners LP’s Form 8-K filed on November 13, 2017)
3.11	Third Amendment to the Fifth Amended and Restated Agreement of Limited Partnership of Crestwood Equity Partners LP entered into and effective as of May 30, 2018 (incorporated by reference to Exhibit 3.1 to Crestwood Equity Partners LP’s Form 8-K filed on June 4, 2018)
3.12	Second Amended and Restated Agreement of Limited Partnership of Crestwood Midstream Partners LP, dated as of September 30, 2015 (incorporated by reference to Exhibit 3.1 to Crestwood Midstream Partners LP's Form 8-K filed on October 1, 2015)
3.13	Certificate of Formation of NRGM GP, LLC (incorporated herein by reference to Exhibit 3.7 to Inergy Midstream, L.P.'s Form S-1/A filed on November 21, 2011)
3.14	Amended and Restated Limited Liability Company Agreement of NRGM GP, LLC, dated December 21, 2011 (incorporated herein by reference to Exhibit 3.2 to Inergy Midstream, L.P.'s Form 8-K filed on December 22, 2011)
3.15	Amendment No. 1 to the Amended and Restated Limited Liability Company Agreement of Crestwood Midstream GP LLC (f/k/a NRGM GP, LLC) (incorporated herein by reference to Exhibit 3.39 to Crestwood Midstream Partners LP's Form S-4/A filed on October 28, 2013)
3.16	Fourth Amendment to the Fifth Amended and Restated Agreement of Limited Partnership of Crestwood Equity Partners LP entered into and effective as of June 28, 2019 (incorporated by reference to Exhibit 3.1 to Crestwood Equity Partners LP’s Form 8-K filed on June 28, 2019)

54

3.17	Sixth Amended and Restated Agreement of Limited Partnership of Crestwood Equity Partners LP dated August 20, 2021 (incorporated by reference to Exhibit 3.1 to Crestwood Equity Partners LP’s Form 8-K filed on August 20, 2021)
3.18	Second Amended and Restated Limited Liability Company Agreement of Crestwood Equity GP LLC dated August 20, 2021 (incorporated by reference to Exhibit 3.2 to Crestwood Equity Partners LP’s Form 8-K on August 20, 2021)
10.1	First Amendment to the Third Amended and Restated Limited Liability Company Agreement of Crestwood Niobrara LLC dated as of April 9, 2019 (incorporated by reference to Exhibit 4.1 to Crestwood Equity Partners LP’s Form 8-K filed on August 20, 2021)
10.2	First Amendment to the Crestwood Equity Partners LP 2018 Long Term Incentive Plan (incorporated by reference to Exhibit 10.1 to Crestwood Equity Partners LP’s Form 8-K filed on August 20, 2021)
*31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act, as amended - Crestwood Equity Partners LP
*31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act, as amended - Crestwood Equity Partners LP
*31.3	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act, as amended - Crestwood Midstream Partners LP
*31.4	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act, as amended - Crestwood Midstream Partners LP
*32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 - Crestwood Equity Partners LP
*32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 - Crestwood Equity Partners LP
*32.3	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 - Crestwood Midstream Partners LP
*32.4	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 - Crestwood Midstream Partners LP
**101.INS	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
**101.SCH	Inline XBRL Taxonomy Extension Schema Document
**101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
**101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
**101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
**101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document
104	Cover Page Interactive Data File (contained in Exhibit 101)

*

Filed herewith

**

Pursuant to Rule 406T of Regulation S-T, the Interactive Data Files on Exhibit 101 hereto are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections.

55

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		CRESTWOOD EQUITY PARTNERS LP
		By:	CRESTWOOD EQUITY GP LLC
			(its general partner)
Date:	October 28, 2021	By:	/s/ ROBERT T. HALPIN
			Robert T. Halpin
			Executive Vice President and Chief Financial Officer
			(Duly Authorized Officer and Principal Financial Officer)
		CRESTWOOD MIDSTREAM PARTNERS LP
		By:	CRESTWOOD MIDSTREAM GP LLC
			(its general partner)
Date:	October 28, 2021	By:	/s/ ROBERT T. HALPIN
			Robert T. Halpin
			Executive Vice President and Chief Financial Officer
			(Duly Authorized Officer and Principal Financial Officer)

56

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Robert G. Phillips, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Crestwood Equity Partners LP (the “registrant”);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d - 15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: October 28, 2021

/s/ Robert G. Phillips

Robert G. Phillips

Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Robert T. Halpin, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Crestwood Equity Partners LP (the “registrant”);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d - 15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: October 28, 2021

/s/ Robert T. Halpin

Robert T. Halpin

Executive Vice President and Chief Financial Officer

EX-31.3

Exhibit 31.3

CERTIFICATIONS

I, Robert G. Phillips, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Crestwood Midstream Partners LP (the “registrant”);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d - 15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: October 28, 2021

/s/ Robert G. Phillips

Robert G. Phillips

Chairman, President and Chief Executive Officer

EX-31.4

Exhibit 31.4

CERTIFICATIONS

I, Robert T. Halpin, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Crestwood Midstream Partners LP (the “registrant”);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d - 15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: October 28, 2021

/s/ Robert T. Halpin    

Robert T. Halpin

Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of the Chief Executive Officer

Pursuant to 18 U.S.C. Section 1350

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Crestwood Equity Partners LP (the “Company”) on Form 10-Q for the period ended September 30, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert G. Phillips, Chief Executive Officer of Crestwood Equity Partners LP, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ Robert G. Phillips
October 28, 2021	Robert G. Phillips Chief Executive Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

Certification of the Chief Financial Officer

Pursuant to 18 U.S.C. Section 1350

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Crestwood Equity Partners LP (the “Company”) on Form 10-Q for the period ended September 30, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert T. Halpin, Chief Financial Officer of Crestwood Equity Partners LP, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ Robert T. Halpin
October 28, 2021	Robert T. Halpin Chief Financial Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.3

Exhibit 32.3

Certification of the Chief Executive Officer

Pursuant to 18 U.S.C. Section 1350

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Crestwood Midstream Partners LP (the “Company”) on Form 10-Q for the period ended September 30, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert G. Phillips, Chief Executive Officer of Crestwood Midstream Partners LP, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ Robert G. Phillips
October 28, 2021	Robert G. Phillips Chief Executive Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.4

Exhibit 32.4

Certification of the Chief Financial Officer

Pursuant to 18 U.S.C. Section 1350

As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Crestwood Midstream Partners LP (the “Company”) on Form 10-Q for the period ended September 30, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert T. Halpin, Chief Financial Officer of Crestwood Midstream Partners LP, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ Robert T. Halpin
October 28, 2021	Robert T. Halpin Chief Financial Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

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Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 21, 2021
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
Amendment Flag	false
Document Fiscal Year Focus	2021
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		62,899,539
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
Document Type	10-Q
Document Period End Date	Sep. 30, 2021
Crestwood Midstream Partners LP
Document Information [Line Items]
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Amendment Flag	false
Document Fiscal Year Focus	2021
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
Document Type	10-Q
Document Period End Date	Sep. 30, 2021
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

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Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Assets
Cash	$ 14.3	$ 14.0
Accounts receivable, less allowance for doubtful accounts of $1.4 million and $0.9 million at September 30, 2021 and December 31, 2020	420.0	262.2
Inventory	175.0	89.1
Assets from price risk management activities	39.1	27.2
Prepaid expenses and other current assets	7.1	13.4
Total current assets	655.5	405.9
Property, plant and equipment	3,788.5	3,759.6
Less: accumulated depreciation	962.7	842.5
Property, plant and equipment, net	2,825.8	2,917.1
Intangible assets	1,126.1	1,126.1
Less: accumulated amortization	377.9	331.8
Intangible assets, net	748.2	794.3
Goodwill	138.6	138.6
Operating lease right-of-use assets, net	31.1	36.8
Investments in unconsolidated affiliates	168.0	943.7
Other non-current assets	7.3	7.3
Total assets	4,574.5	5,243.7
Current liabilities:
Accounts payable	358.7	160.3
Accrued expenses and other liabilities	140.5	122.0
Liabilities from price risk management activities	277.3	76.3
Contingent consideration, current portion	0.0	19.0
Current portion of long-term debt	0.2	0.2
Total current liabilities	776.7	377.8
Long-term debt, less current portion	2,024.9	2,483.8
Contingent consideration	0.0	38.0
Other long-term liabilities	259.8	253.3
Deferred income taxes	2.3	2.7
Total liabilities	3,063.7	3,155.6
Commitments and contingencies (Note 9)
Interest of non-controlling partner in subsidiary	434.5	432.7
Partners’ capital:
Crestwood Equity Partners LP partners’ capital (62,897,480 common units issued and outstanding at September 30, 2021 and 73,970,208 common and subordinated units issued and outstanding at December 31, 2020)	464.3	1,043.4
Preferred units (71,257,445 units issued and outstanding at both September 30, 2021 and December 31, 2020)	612.0	612.0
Total partners’ capital	1,076.3	1,655.4
Total liabilities and capital	$ 4,574.5	$ 5,243.7
Limited Partners' Capital Account, Units Issued	62,897,480	73,970,208
Limited Partners' Capital Account, Units Outstanding	62,897,480	73,970,208
Preferred Units, Issued	71,257,445	71,257,445
Preferred Units, Outstanding	71,257,445	71,257,445
Crestwood Midstream Partners LP
Assets
Cash	$ 13.9	$ 13.7
Accounts receivable, less allowance for doubtful accounts of $1.4 million and $0.9 million at September 30, 2021 and December 31, 2020	420.0	262.2
Inventory	175.0	89.1
Assets from price risk management activities	39.1	27.2
Prepaid expenses and other current assets	7.1	13.4
Total current assets	655.1	405.6
Property, plant and equipment	4,118.6	4,089.6
Less: accumulated depreciation	1,159.1	1,028.3
Property, plant and equipment, net	2,959.5	3,061.3
Intangible assets	1,126.1	1,126.1
Less: accumulated amortization	377.9	331.8
Intangible assets, net	748.2	794.3
Goodwill	138.6	138.6
Operating lease right-of-use assets, net	31.1	36.8
Investments in unconsolidated affiliates	168.0	943.7
Other non-current assets	5.1	5.2
Total assets	4,705.6	5,385.5
Current liabilities:
Accounts payable	358.6	157.8
Accrued expenses and other liabilities	139.3	120.1
Liabilities from price risk management activities	277.3	76.3
Contingent consideration, current portion	0.0	19.0
Current portion of long-term debt	0.2	0.2
Total current liabilities	775.4	373.4
Long-term debt, less current portion	2,024.9	2,483.8
Contingent consideration	0.0	38.0
Other long-term liabilities	256.6	251.8
Deferred income taxes	0.7	0.7
Total liabilities	3,057.6	3,147.7
Commitments and contingencies (Note 9)
Interest of non-controlling partner in subsidiary	434.5	432.7
Partners’ capital:
Partners' capital	1,213.5	1,805.1
Total liabilities and capital	$ 4,705.6	$ 5,385.5

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Allowance for doubtful accounts	$ 1.4	$ 0.9
Limited Partners' Capital Account, Units Issued	62,897,480	73,970,208
Limited Partners' Capital Account, Units Outstanding	62,897,480	73,970,208
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	$ 1.4	$ 0.9

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Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Revenues	$ 1,226.3	$ 519.2	$ 3,188.6	$ 1,599.8
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 15)	34.8	6.1	101.3	12.9
Total costs of product/services sold	1,099.3	358.7	2,710.3	1,118.8
Operating expenses and other:
Operations and maintenance	31.6	31.0	90.2	100.2
General and administrative	25.9	19.6	67.4	64.0
Depreciation, amortization and accretion	64.6	60.8	182.6	177.9
Loss on long-lived assets, net	18.5	21.3	19.6	26.1
Goodwill impairment	0.0	0.0	0.0	80.3
Total expenses	140.6	132.7	359.8	448.5
Operating income (loss)	(13.6)	27.8	118.5	32.5
Earnings (loss) from unconsolidated affiliates, net	4.9	10.5	(125.9)	24.4
Interest and debt expense, net	(30.9)	(33.7)	(102.0)	(100.3)
Gain (Loss) on Extinguishment of Debt	0.0	0.0	(6.7)	0.0
Other income, net	0.1	0.0	0.2	0.2
Income (loss) before income taxes	(39.5)	4.6	(115.9)	(43.2)
(Provision) benefit for income taxes	(0.1)	0.0	(0.1)	0.1
Net income (loss)	(39.6)	4.6	(116.0)	(43.1)
Net income attributable to non-controlling partner	10.3	10.3	30.7	30.4
Net income (loss) attributable to parent	(49.9)	(5.7)	(146.7)	(73.5)
Net income attributable to preferred unit holders	15.0	15.0	45.0	45.0
Net loss attributable to partners	$ (64.9)	$ (20.7)	$ (191.7)	$ (118.5)
Net loss per limited partner unit: (Note 12)
Basic (in dollars per share)	$ (1.03)	$ (0.28)	$ (2.88)	$ (1.62)
Diluted (in dollars per share)	$ (1.03)	$ (0.28)	$ (2.88)	$ (1.62)
Weighted-average limited partners’ units outstanding:
Basic (units)	62.9	73.4	66.6	73.1
Diluted (units)	62.9	73.4	66.6	73.1
Affiliated Entity
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 15)	$ 34.8	$ 6.1	$ 101.3	$ 12.9
Crestwood Midstream Partners LP
Revenues:
Revenues	1,226.3	519.2	3,188.6	1,599.8
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 15)	34.8	6.1	101.3	12.9
Total costs of product/services sold	1,099.3	358.7	2,710.3	1,118.8
Operating expenses and other:
Operations and maintenance	31.6	31.0	90.2	100.2
General and administrative	24.4	18.5	61.3	60.4
Depreciation, amortization and accretion	68.2	64.2	193.2	188.4
Loss on long-lived assets, net	18.5	21.3	19.6	26.1
Goodwill impairment	0.0	0.0	0.0	80.3
Total expenses	142.7	135.0	364.3	455.4
Operating income (loss)	(15.7)	25.5	114.0	25.6
Earnings (loss) from unconsolidated affiliates, net	4.9	10.5	(125.9)	24.4
Interest and debt expense, net	(30.9)	(33.7)	(102.0)	(100.3)
Gain (Loss) on Extinguishment of Debt	0.0	0.0	(6.7)	0.0
Income (loss) before income taxes	(41.7)	2.3	(120.6)	(50.3)
(Provision) benefit for income taxes	(0.1)	0.0	(0.1)	0.2
Net income (loss)	(41.8)	2.3	(120.7)	(50.1)
Net income attributable to non-controlling partner	10.3	10.3	30.7	30.4
Net income (loss) attributable to parent	(52.1)	(8.0)	(151.4)	(80.5)
Product
Revenues:
Revenues	1,127.3	417.2	2,896.3	1,282.1
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	1,060.2	348.2	2,595.8	1,090.2
Product | Affiliated Entity
Revenues:
Revenues	6.5	10.7	24.2	25.4
Product | Crestwood Midstream Partners LP
Revenues:
Revenues	1,127.3	417.2	2,896.3	1,282.1
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	1,060.2	348.2	2,595.8	1,090.2
Product | Crestwood Midstream Partners LP | Affiliated Entity
Revenues:
Revenues	6.5	10.7	24.2	25.4
Service
Revenues:
Revenues	99.0	102.0	292.3	317.7
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	4.3	4.4	13.2	15.7
Service | Affiliated Entity
Revenues:
Revenues	0.6	0.2	1.0	0.5
Service | Crestwood Midstream Partners LP
Revenues:
Revenues	99.0	102.0	292.3	317.7
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	4.3	4.4	13.2	15.7
Service | Crestwood Midstream Partners LP | Affiliated Entity
Revenues:
Revenues	0.6	0.2	1.0	0.5
Gathering and Processing Segment | Product
Revenues:
Revenues	82.0	54.0	237.2	187.2
Gathering and Processing Segment | Product | Crestwood Midstream Partners LP
Revenues:
Revenues	82.0	54.0	237.2	187.2
Gathering and Processing Segment | Service
Revenues:
Revenues	88.8	91.2	261.1	287.4
Gathering and Processing Segment | Service | Crestwood Midstream Partners LP
Revenues:
Revenues	88.8	91.2	261.1	287.4
Marketing Supply and Logistics | Product
Revenues:
Revenues	1,038.8	352.5	2,634.9	1,069.5
Marketing Supply and Logistics | Product | Crestwood Midstream Partners LP
Revenues:
Revenues	1,038.8	352.5	2,634.9	1,069.5
Marketing Supply and Logistics | Service
Revenues:
Revenues	7.6	7.1	24.2	19.7
Marketing Supply and Logistics | Service | Crestwood Midstream Partners LP
Revenues:
Revenues	7.6	7.1	24.2	19.7
Storage and Transportation | Service
Revenues:
Revenues	2.0	3.5	6.0	10.1
Storage and Transportation | Service | Crestwood Midstream Partners LP
Revenues:
Revenues	$ 2.0	$ 3.5	$ 6.0	$ 10.1

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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (39.6)	$ 4.6	$ (116.0)	$ (43.1)
Change in fair value of Suburban Propane Partners, L.P. units	0.0	0.3	0.0	(0.8)
Comprehensive income (loss)	(39.6)	4.9	(116.0)	(43.9)
Comprehensive income attributable to non-controlling partner	10.3	10.3	30.7	30.4
Comprehensive loss attributable to Crestwood Equity Partners LP	$ (49.9)	$ (5.4)	$ (146.7)	$ (74.3)

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Consolidated Statement of Partners' Capital - USD ($) $ in Millions	Total	Preferred Units	Common unit	Partners' Capital	Crestwood Midstream Partners LP	Crestwood Midstream Partners LP Partners' Capital	Preferred Units	Common Units	Subordinated Units
Preferred units, beginning balance (in units) at Dec. 31, 2019							71,300,000
Partner units, beginning balance (in units) at Dec. 31, 2019								71,900,000	400,000
Beginning balance at Dec. 31, 2019		$ 612.0	$ 1,320.8	$ 1,932.8		$ 2,099.3
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15.0)	(45.3)	(60.3)		(57.0)
Unit-based compensation charges (in shares)								1,700,000
Unit-based compensation charges			0.2	0.2		(4.4)
Taxes paid for unit-based compensation vesting (in shares)								(500,000)
Taxes paid for unit-based compensation vesting			(15.1)	(15.1)		(15.1)
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) attributable to parent		15.0	(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		612.0	1,214.7	1,826.7		1,986.2
Preferred units, beginning balance (in units) at Dec. 31, 2019							71,300,000
Partner units, beginning balance (in units) at Dec. 31, 2019								71,900,000	400,000
Beginning balance at Dec. 31, 2019		612.0	1,320.8	1,932.8		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) attributable to parent	(73.5)				$ (80.5)
Preferred units, ending balance (in units) at Sep. 30, 2020							71,300,000
Partner units, ending balance (in units) at Sep. 30, 2020								73,600,000	400,000
Ending Balance at Sep. 30, 2020		612.0	1,073.2	1,685.2		1,837.5
Increase (Decrease) in Partners' Capital [Roll Forward]
Other (in shares)								200,000
Preferred units, beginning balance (in units) at Mar. 31, 2020							71,300,000
Partner units, beginning balance (in units) at Mar. 31, 2020								73,300,000	400,000
Beginning balance at Mar. 31, 2020		612.0	1,214.7	1,826.7		1,986.2
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15.0)	(45.7)	(60.7)		(62.0)
Unit-based compensation charges			13.6	13.6		13.6
Taxes paid for unit-based compensation vesting (in shares)								(100,000)
Taxes paid for unit-based compensation vesting			(0.4)	(0.4)		(0.4)
Other			(0.1)	(0.1)		0.1
Net income (loss) attributable to parent		15.0	(49.5)	(34.5)		(37.0)
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		612.0	1,132.6	1,744.6		1,900.5
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15.0)	(45.7)	(60.7)		(61.9)
Unit-based compensation charges (in shares)								400,000
Unit-based compensation charges			7.1	7.1		7.1
Taxes paid for unit-based compensation vesting			(0.1)	(0.1)		(0.1)
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) attributable to parent	$ (5.7)	15.0	(20.7)	(5.7)	(8.0)	(8.0)
Preferred units, ending balance (in units) at Sep. 30, 2020							71,300,000
Partner units, ending balance (in units) at Sep. 30, 2020								73,600,000	400,000
Ending Balance at Sep. 30, 2020		612.0	1,073.2	1,685.2		1,837.5
Preferred units, beginning balance (in units) at Dec. 31, 2020	71,257,445						71,300,000
Partner units, beginning balance (in units) at Dec. 31, 2020								73,600,000	400,000
Beginning balance at Dec. 31, 2020		612.0	1,043.4	1,655.4	1,805.1	1,805.1
Increase (Decrease) in Partners' Capital [Roll Forward]
Stock Repurchased and Retired During Period, Value			(273.2)	(273.2)
Treasury Stock, Shares, Retired								(11,500,000)	(400,000)
Distributions to partners		(15.0)	(46.4)	(61.4)		(334.0)
Unit-based compensation charges (in shares)								1,100,000
Unit-based compensation charges			3.7	3.7		2.3
Taxes paid for unit-based compensation vesting (in shares)								(400,000)
Taxes paid for unit-based compensation vesting			(8.1)	(8.1)		(8.1)
Other			(0.4)	(0.4)		(0.1)
Net income (loss) attributable to parent		15.0	(63.4)	(48.4)		(50.5)
Preferred units, ending balance (in units) at Mar. 31, 2021							71,300,000
Partner units, ending balance (in units) at Mar. 31, 2021								62,800,000	0
Ending Balance at Mar. 31, 2021		612.0	655.6	1,267.6		1,414.7
Preferred units, beginning balance (in units) at Dec. 31, 2020	71,257,445						71,300,000
Partner units, beginning balance (in units) at Dec. 31, 2020								73,600,000	400,000
Beginning balance at Dec. 31, 2020		612.0	1,043.4	1,655.4	1,805.1	1,805.1
Increase (Decrease) in Partners' Capital [Roll Forward]
Change in fair value of Suburban Propane Partners, L.P. units	$ 0.0
Net income (loss) attributable to parent	$ (146.7)				(151.4)
Preferred units, ending balance (in units) at Sep. 30, 2021	71,257,445						71,300,000
Partner units, ending balance (in units) at Sep. 30, 2021								62,900,000	0
Ending Balance at Sep. 30, 2021		612.0	464.3	1,076.3	1,213.5	1,213.5
Preferred units, beginning balance (in units) at Mar. 31, 2021							71,300,000
Partner units, beginning balance (in units) at Mar. 31, 2021								62,800,000	0
Beginning balance at Mar. 31, 2021		612.0	655.6	1,267.6		1,414.7
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15.0)	(39.3)	(54.3)		(61.4)
Unit-based compensation charges (in shares)								0
Unit-based compensation charges			7.6	7.6		7.6
Taxes paid for unit-based compensation vesting (in shares)								0
Taxes paid for unit-based compensation vesting			(0.1)	(0.1)		(0.1)
Other			(0.3)	(0.3)
Net income (loss) attributable to parent		15.0	(63.4)	(48.4)		(48.8)
Preferred units, ending balance (in units) at Jun. 30, 2021							71,300,000
Partner units, ending balance (in units) at Jun. 30, 2021								62,800,000	0
Ending Balance at Jun. 30, 2021		612.0	560.1	1,172.1		1,312.0
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions to partners		(15.0)	(39.3)	(54.3)		(55.9)
Unit-based compensation charges (in shares)								100,000
Unit-based compensation charges			9.6	9.6		9.6
Taxes paid for unit-based compensation vesting (in shares)								0
Taxes paid for unit-based compensation vesting			(0.1)	(0.1)		(0.1)
Change in fair value of Suburban Propane Partners, L.P. units	$ 0.0
Other			(1.1)	(1.1)
Net income (loss) attributable to parent	$ (49.9)	15.0	(64.9)	(49.9)	(52.1)	(52.1)
Preferred units, ending balance (in units) at Sep. 30, 2021	71,257,445						71,300,000
Partner units, ending balance (in units) at Sep. 30, 2021								62,900,000	0
Ending Balance at Sep. 30, 2021		$ 612.0	$ 464.3	$ 1,076.3	$ 1,213.5	$ 1,213.5

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Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities
Net income (loss)	$ (116.0)	$ (43.1)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and accretion	182.6	177.9
Amortization of debt-related deferred costs	5.1	4.9
Unit-based compensation charges	22.8	17.3
Loss on long-lived assets, net	19.6	26.1
Goodwill impairment	0.0	80.3
Loss on modification/extinguishment of debt	6.7	0.0
(Earnings) loss from unconsolidated affiliates, net, adjusted for cash distributions received	137.5	5.4
Deferred income taxes	(0.4)	(0.4)
Other Operating Activities, Cash Flow Statement	0.2	0.0
Changes in operating assets and liabilities	114.8	26.9
Net cash provided by operating activities	372.9	295.3
Investing activities
Acquisition, net of cash acquired (Note 3)	0.0	(162.3)
Purchases of property, plant and equipment	(55.8)	(158.8)
Investments in unconsolidated affiliates	(10.2)	(6.0)
Capital distributions from unconsolidated affiliates	648.4	27.8
Other	0.5	1.6
Net cash provided by (used in) investing activities	582.9	(297.7)
Financing activities
Proceeds from the issuance of long-term debt	2,236.4	947.0
Payments on long-term debt	(2,695.9)	(731.1)
Payments on finance leases	(2.1)	(2.4)
Payments for deferred financing costs	(11.1)	0.0
Net proceeds from issuance of non-controlling interest	1.0	2.8
Payments for Crestwood Holdings Transactions	(275.6)	0.0
Distributions to partners	(125.0)	(136.7)
Distributions to non-controlling partner	(29.9)	(27.8)
Distributions to preferred unitholders	(45.0)	(45.0)
Taxes paid for unit-based compensation vesting	(8.3)	(15.6)
Net cash used in financing activities	(955.5)	(8.8)
Net change in cash	0.3	(11.2)
Cash at beginning of period	14.0	25.7
Cash at end of period	14.3	14.5
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	(9.2)	40.0
Crestwood Midstream Partners LP
Operating activities
Net income (loss)	(120.7)	(50.1)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, amortization and accretion	193.2	188.4
Amortization of debt-related deferred costs	5.1	4.9
Unit-based compensation charges	22.8	17.3
Loss on long-lived assets, net	19.6	26.1
Goodwill impairment	0.0	80.3
Loss on modification/extinguishment of debt	6.7	0.0
(Earnings) loss from unconsolidated affiliates, net, adjusted for cash distributions received	137.5	5.4
Deferred income taxes	0.0	(0.1)
Other Operating Activities, Cash Flow Statement	0.2	0.0
Changes in operating assets and liabilities	114.1	21.8
Net cash provided by operating activities	378.5	294.0
Investing activities
Acquisition, net of cash acquired (Note 3)	0.0	(162.3)
Purchases of property, plant and equipment	(55.8)	(158.8)
Investments in unconsolidated affiliates	(10.2)	(6.0)
Capital distributions from unconsolidated affiliates	648.4	27.8
Other	0.5	1.6
Net cash provided by (used in) investing activities	582.9	(297.7)
Financing activities
Proceeds from the issuance of long-term debt	2,236.4	947.0
Payments on long-term debt	(2,695.9)	(731.1)
Payments on finance leases	(2.1)	(2.4)
Payments for deferred financing costs	(11.1)	0.0
Net proceeds from issuance of non-controlling interest	1.0	2.8
Distributions to partners	(451.3)	(180.9)
Distributions to non-controlling partner	(29.9)	(27.8)
Taxes paid for unit-based compensation vesting	(8.3)	(15.6)
Net cash used in financing activities	(961.2)	(8.0)
Net change in cash	0.2	(11.7)
Cash at beginning of period	13.7	25.4
Cash at end of period	13.9	13.7
Supplemental schedule of noncash investing activities
Net change to property, plant and equipment through accounts payable and accrued expenses	(9.2)	40.0
Non-Controlling Partners
Financing activities
Net proceeds from issuance of non-controlling interest	$ 1.0	$ 2.8

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Organization and Business Description

9 Months Ended

Sep. 30, 2021

Disclosure Partnership Organization And Basis Of Presentation Narrative [Abstract]

Organization and Business Description

Organization and Business Description

The accompanying notes to the consolidated financial statements apply to Crestwood Equity Partners LP (Crestwood Equity or CEQP) and Crestwood Midstream Partners LP (Crestwood Midstream or CMLP), unless otherwise indicated.

The accompanying consolidated financial statements and related notes should be read in conjunction with our 2020 Annual Report on Form 10-K filed with the Securities and Exchange Commission (SEC) on February 26, 2021. The financial information as of September 30, 2021, and for the three and nine months ended September 30, 2021 and 2020, is unaudited. The consolidated balance sheets as of December 31, 2020 were derived from the audited balance sheets filed in our 2020 Annual Report on Form 10-K.

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 either Crestwood Midstream Partners LP itself or Crestwood Midstream Partners LP and its consolidated subsidiaries.

Organization

Crestwood Equity Partners LP. CEQP is a publicly-traded (NYSE: CEQP) Delaware limited partnership formed in March 2001. Crestwood Equity GP LLC (Crestwood Equity GP) owns our non-economic general partnership interest. Prior to the Crestwood Holdings Transactions described below, Crestwood Equity was indirectly owned by Crestwood Holdings LLC (Crestwood Holdings), which is substantially owned and controlled by First Reserve Management, L.P. (First Reserve).

Crestwood Midstream Partners LP. Crestwood Equity owns a 99.9% limited partnership interest in Crestwood Midstream and Crestwood Gas Services GP LLC (CGS GP), a wholly-owned subsidiary of Crestwood Equity, owns a 0.1% limited partnership interest in Crestwood Midstream. Crestwood Midstream GP LLC, a wholly-owned subsidiary of Crestwood Equity, owns the non-economic general partnership interest of Crestwood Midstream.

Crestwood Holdings Transactions. In March 2021, CEQP paid Crestwood Holdings approximately $268 million to (i) acquire approximately 11.5 million CEQP common units, 0.4 million subordinated units of CEQP and 100% of the equity interests of Crestwood Marcellus Holdings LLC and Crestwood Gas Services Holdings LLC (whose assets consisted solely of CEQP common and subordinated units and 1% of the limited partner interests in Crestwood Holdings LP) in March 2021; and (ii) acquire the general partner and the remaining 99% limited partner interests of Crestwood Holdings LP (whose assets consist solely of its ownership interest in Crestwood Equity GP, which owns CEQP’s non-economic general partner interest) in August 2021 (collectively, the Crestwood Holdings Transactions). The purchase price was funded through borrowings under the Crestwood Midstream credit facility. CEQP retired the common and subordinated units acquired in the Crestwood Holdings Transactions.

The diagram below reflects a simplified version our ownership structure as of September 30, 2021 following the Crestwood Holdings Transactions.

Business Description

Crestwood Equity 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 natural gas liquids (NGLs), crude oil, natural gas and produced water gathering, processing, storage, disposal 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.

Our financial statements reflect three operating and reporting segments described below.

•Gathering and Processing. Our gathering and processing operations provide natural gas, crude oil and produced water gathering, compression, treating, processing and disposal services to producers in multiple unconventional resource plays in some of the largest shale plays in the United States in which we have established footprints in the “core of the core” areas.

•Storage and Transportation. Our storage and transportation operations provide crude oil and natural gas storage and transportation services to producers, utilities and other customers.

•Marketing, Supply and Logistics. Our marketing, supply and logistics operations provide NGLs, crude oil and natural gas marketing, storage, terminal and transportation services to producers, refiners, marketers and other customers.

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Basis of Presentation and Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2021

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. Certain amounts and footnote disclosures in the prior periods have been reclassified to conform to the current year presentation, none of which impacted our previously reported net income, earnings per unit or partners’ capital. In management’s opinion, all necessary adjustments to fairly present our results of operations, financial position and cash flows for the periods presented have been made and all such adjustments are of a normal and recurring nature. Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with GAAP have been omitted pursuant to the rules and regulations of the SEC.

Significant Accounting Policies

There were no material changes in our significant accounting policies from those described in our 2020 Annual Report on Form 10-K. Below is an update of our accounting policies related to Property, Plant and Equipment and Goodwill.

During the three months ended September 30, 2021, we recorded a loss on long-lived assets of approximately $19 million related to the abandonment and dismantlement of certain of our gathering and processing segment’s Marcellus West Union compressor station assets. Our West Union compressor station assets were located in West Virginia and provided compression and dehydration services to our customers. During the three months ended September 30, 2020, we recorded a $19.9 million loss on long-lived assets related to the sale of our Fayetteville assets in October 2020 and during the nine months ended September 30, 2020 we recorded an $80.3 million full impairment of the goodwill associated with our Powder River Basin reporting unit based on events that occurred during 2020 which resulted in a significant decrease in the forecasted cash flows and fair value of the reporting unit. For a further discussion of this goodwill impairment, see our 2020 Annual Report on Form 10-K.

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Acquisitions	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Acquisitions and Divestitures	AcquisitionIn April 2020, we acquired several NGL storage and rail-to-truck terminals from Plains All American Pipeline, L.P. for approximately $162 million. The acquired assets include 7 MMBbls of NGL storage and seven terminals. 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.

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Certain Balance Sheet Information

9 Months Ended

Sep. 30, 2021

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,
	2021		2020		2021		2020
Accrued expenses	$	51.1	$	48.3	$	49.9	$	46.4
Accrued property taxes	6.9		8.4		6.9		8.4
Income tax payable	0.3		0.2		0.3		0.2
Interest payable	36.7		24.9		36.7		24.9
Accrued additions to property, plant and equipment	18.1		12.3		18.1		12.3
Operating leases	14.5		14.7		14.5		14.7
Finance leases	2.1		2.9		2.1		2.9
Deferred revenue	10.8		10.3		10.8		10.3
Total accrued expenses and other liabilities	$	140.5	$	122.0	$	139.3	$	120.1

Other Long-Term Liabilities

Other long-term liabilities consisted of the following (in millions):

	CEQP				CMLP
	September 30,		December 31,		September 30,		December 31,
	2021		2020		2021		2020
Contract liabilities	$	183.4	$	172.2	$	183.4	$	172.2
Operating leases	22.0		28.5		22.0		28.5
Asset retirement obligations	35.6		34.1		35.6		34.1
Other	18.8		18.5		15.6		17.0
Total other long-term liabilities	$	259.8	$	253.3	$	256.6	$	251.8

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Investments in Unconsolidated Affiliates

9 Months Ended

Sep. 30, 2021

Equity Method Investments and Joint Ventures [Abstract]

Investments in Unconsolidated Affiliates

Investments in Unconsolidated Affiliates

Stagecoach Gas Divestiture

In July 2021, Stagecoach Gas sold certain of its wholly-owned subsidiaries to a subsidiary of Kinder Morgan, Inc. (Kinder Morgan) for approximately $1.195 billion plus certain purchase price adjustments (Initial Closing) pursuant to a purchase and sale agreement dated as of May 31, 2021 between our wholly-owned subsidiary, Crestwood Pipeline and Storage Northeast LLC (Crestwood Northeast), Con Edison Gas Pipeline and Storage Northeast, LLC (CEGP), a wholly-owned subsidiary of Consolidated Edison, Inc., Stagecoach Gas and Kinder Morgan. Following the Initial Closing and subject to certain customary closing conditions, Crestwood Northeast and CEGP will sell each of their equity interests in Stagecoach Gas and its wholly-owned subsidiary, Twin Tier Pipeline LLC, (Second Closing) to Kinder Morgan for approximately $30 million, subject to certain closing adjustments.

In conjunction with the Initial Closing, we recorded our share of a loss on long-lived assets (including goodwill) recorded by our Stagecoach Gas equity investment associated with the sale. This eliminated our $51.3 million historical basis difference between our investment balance and the equity in the underlying net assets of Stagecoach Gas, and also resulted in a $155.4 million reduction in our earnings from unconsolidated affiliates during the nine months ended September 30, 2021. In addition, our earnings from unconsolidated affiliates during the nine months ended September 30, 2021 were also reduced by our proportionate share of transaction costs of approximately $3.0 million related to the Initial Closing, which were paid by us in July 2021 on behalf of Stagecoach Gas. Our Stagecoach Gas investment is included in our storage and transportation segment.

Net Investments and Earnings (Loss) of Unconsolidated Affiliates

Our net investments in and earnings (loss) from our unconsolidated affiliates are as follows (in millions):

	Investment				Earnings (Loss) from Unconsolidated Affiliates				Earnings (Loss) from Unconsolidated Affiliates
					Three Months Ended				Nine Months Ended
	September 30,		December 31,		September 30,				September 30,
	2021		2020		2021		2020		2021		2020
Stagecoach Gas Services LLC(1)	$	15.2	$	792.5	$	0.9	$	9.9	$	(139.4)	$	28.3
Tres Palacios Holdings LLC(2)	38.4		35.5		(0.1)		0.1		9.1		0.2
Powder River Basin Industrial Complex, LLC(3)	3.5		3.6		(0.1)		—		—		(4.4)
Crestwood Permian Basin Holdings LLC(4)	110.9		112.1		4.2		0.5		4.4		0.3
Total	$	168.0	$	943.7	$	4.9	$	10.5	$	(125.9)	$	24.4

(1)As of September 30, 2021, our equity in the underlying net assets of Stagecoach Gas approximates the carrying value of our investment.

(2)As of September 30, 2021, our equity in the underlying net assets of Tres Palacios Holdings LLC (Tres Holdings) exceeded the carrying value of our investment balance by approximately $21.8 million. During both the three and nine months ended September 30, 2021 and 2020, we recorded amortization of approximately $0.3 million and $0.9 million, respectively, related to this excess basis, which is reflected as an increase in our earnings from unconsolidated affiliates in our consolidated statements of operations. Our Tres Holdings investment is included in our storage and transportation segment.

(3)As of September 30, 2021, our equity in the underlying net assets of Powder River Basin Industrial Complex, LLC (PRBIC) approximates the carrying value of 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.

(4)As of September 30, 2021, our equity in the underlying net assets of Crestwood Permian exceeded our investment balance by $7.5 million, and this excess amount is not subject to amortization. Our Crestwood Permian investment is included in our gathering and processing segment and is no longer considered a variable interest entity.

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,
	2021						2020
	Operating Revenues		Operating Expenses		Net Income (Loss)		Operating Revenues		Operating Expenses		Net Income (Loss)
Stagecoach Gas	$	81.4	$	456.9	$	(375.5)	$	115.3	$	58.9	$	56.5
Other(1)	232.4		208.2		24.9		91.2		113.0		(21.0)
Total	$	313.8	$	665.1	$	(350.6)	$	206.5	$	171.9	$	35.5

(1)Includes our Tres Holdings, PRBIC and Crestwood Permian equity investments.

Distributions and Contributions

The following table summarizes our distributions from and contributions to our unconsolidated affiliates (in millions):

	Distributions(1)				Contributions
	Nine Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Stagecoach Gas	$	640.9	$	44.5	$	—	$	—
Tres Holdings	13.1		4.4		6.9		6.0
PRBIC	0.1		0.2		—		—
Crestwood Permian	8.9		8.5		3.3		—
Total	$	663.0	$	57.6	$	10.2	$	6.0

(1)    In July 2021, Stagecoach Gas closed on the sale of certain of its wholly-owned subsidiaries to a subsidiary of Kinder Morgan and distributed to us approximately $613.9 million as our proportionate share of the gross proceeds received from the sale. We utilized approximately $3 million of these proceeds to pay transaction costs related to the sale described above, $40 million of these proceeds to pay our remaining contingent consideration obligation and related accrued interest described below, and the remaining proceeds to repay a portion of the amounts outstanding under the Crestwood Midstream credit facility. In October 2021, we received cash distributions from Tres Holdings and Crestwood Permian of approximately $2.4 million and $7.4 million, respectively.

Other

Contingent Consideration. Pursuant to the Stagecoach Gas limited liability company agreement, we were required to make payments to CEGP because certain performance targets on growth capital projects were not achieved by December 31, 2020. During the nine months ended September 30, 2021, we fully satisfied this obligation by paying $57 million plus accrued interest of $2.1 million to CEGP.

Guarantee. CEQP issued a guarantee under which CEQP would be required to pay up to $10 million if Crestwood Permian fails to honor its obligations to Crestwood Permian Basin LLC, a 50% equity investment of Crestwood Permian, in the event Crestwood Permian Basin LLC fails to satisfy its obligations under its gas gathering agreement with a third party. We do not believe that it is probable that this guarantee will result in future losses based on our assessment of the nature of the guarantee, the financial condition of the guaranteed party and the period of time that the guarantee has been outstanding, and as a result, we have not recorded a liability related to this guarantee on our consolidated balance sheets at September 30, 2021 and December 31, 2020.

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Risk Management

9 Months Ended

Sep. 30, 2021

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.

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 product costs in our consolidated statements of operations. The following table summarizes the impact to our consolidated statements of operations related to our commodity-based derivatives during the three and nine months ended September 30, 2021 and 2020 (in millions):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Product revenues	$	129.4	$	32.4	$	296.9	$	125.4
Gain (loss) reflected in product costs	$	(53.4)	$	(1.8)	$	(94.8)	$	13.4

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 product costs related to these instruments.

Notional Amounts and Terms

The notional amounts of our derivative financial instruments include the following:

	September 30, 2021		December 31, 2020
	Fixed Price Payor	Fixed Price Receiver	Fixed Price Payor	Fixed Price Receiver
Propane, ethane, butane, heating oil and crude oil (MMBbls)	73.9	78.4	72.7	76.5
Natural gas (Bcf)	32.1	42.8	22.6	28.6

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, 86% of the contracted volumes will be delivered or settled within 12 months.

Credit Risk

Inherent in our contractual portfolio are certain credit risks. Credit risk is the risk of loss from nonperformance by suppliers, customers or financial counterparties to a contract. We take an active role in managing credit risk and have established control procedures, which are reviewed on an ongoing basis. We attempt to minimize credit risk exposure through credit policies and periodic monitoring procedures as well as through customer deposits, letters of credit and entering into netting agreements that allow for offsetting counterparty receivable and payable balances for certain financial transactions, as deemed appropriate. The counterparties associated with our price risk management activities are energy marketers and propane retailers, resellers and dealers.

Certain of our derivative instruments have credit limits that require us to post collateral. The amount of collateral required to be posted is a function of the net liability position of the derivative as well as our established credit limit with the respective counterparty. If our credit rating were to change, the counterparties could require us to post additional collateral. The amount of additional collateral that would be required to be posted would vary depending on the extent of change in our credit rating as well as the requirements of the individual counterparty. In addition, we have margin requirements with a derivative clearing broker and a third party broker related to our net asset or liability position with each respective 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, 2021		December 31, 2020
Aggregate fair value liability of derivative instruments with credit-risk-related contingent features(1)	$	157.6	$	38.5
Broker-related net derivative asset position	$	199.6	$	35.9
Broker-related cash collateral received	$	163.9	$	18.3
Cash collateral received, net	$	14.3	$	12.4

(1)At September 30, 2021 and December 31, 2020, we posted $1.1 million and less than $0.1 million of collateral associated with these derivatives.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2021

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.

Financial Assets and Liabilities

As of September 30, 2021 and December 31, 2020, 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 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 New York Mercantile Exchange 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, 2021 and December 31, 2020 (in millions):

	September 30, 2021
	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	$	74.2	$	1,469.0	$	—	$	1,543.2	$	(1,339.6)	$	(164.5)	$	39.1
Suburban Propane Partners, L.P. units(2)	2.2		—		—		2.2		—		—		2.2
Total assets at fair value	$	76.4	$	1,469.0	$	—	$	1,545.4	$	(1,339.6)	$	(164.5)	$	41.3
Liabilities
Liabilities from price risk management	$	55.8	$	1,547.4	$	—	$	1,603.2	$	(1,339.6)	$	13.7	$	277.3
Total liabilities at fair value	$	55.8	$	1,547.4	$	—	$	1,603.2	$	(1,339.6)	$	13.7	$	277.3

	December 31, 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	$	20.2	$	480.5	$	—	$	500.7	$	(455.0)	$	(18.5)	$	27.2
Suburban Propane Partners, L.P. units(2)	2.1		—		—		2.1		—		—		2.1
Total assets at fair value	$	22.3	$	480.5	$	—	$	502.8	$	(455.0)	$	(18.5)	$	29.3
Liabilities
Liabilities from price risk management	$	25.1	$	494.0	$	—	$	519.1	$	(455.0)	$	12.2	$	76.3
Total liabilities at fair value	$	25.1	$	494.0	$	—	$	519.1	$	(455.0)	$	12.2	$	76.3

(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 non-current assets on CEQP’s consolidated balance sheets.

Cash, Accounts Receivable and Accounts Payable

As of September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020, 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, 2021				December 31, 2020
	Carrying  Amount		Fair Value		Carrying  Amount		Fair Value
2023 Senior Notes	$	—	$	—	$	683.8	$	691.5
2025 Senior Notes	$	496.3	$	511.9	$	495.5	$	509.9
2027 Senior Notes	$	594.0	$	618.4	$	593.2	$	594.1
2029 Senior Notes	$	690.5	$	734.0	$	—	$	—

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Long-Term Debt

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Long-Term Debt

Long-Term Debt

Long-term debt consisted of the following at September 30, 2021 and December 31, 2020 (in millions):

	September 30, 2021		December 31, 2020
Credit Facility	$	250.5	$	719.0
2023 Senior Notes	—		687.2
2025 Senior Notes	500.0		500.0
2027 Senior Notes	600.0		600.0
2029 Senior Notes	700.0		—
Other(1)	0.2		0.4
Less: deferred financing costs, net	25.6		22.6
Total debt	2,025.1		2,484.0
Less: current portion	0.2		0.2
Total long-term debt, less current portion	$	2,024.9	$	2,483.8

(1)Represents non-interest bearing obligations related to certain companies acquired in 2014 with payments due through 2022.

Credit Facility

Crestwood Midstream’s five-year $1.25 billion revolving credit facility (the CMLP Credit Facility) is available to fund acquisitions, working capital and internal growth projects and for general partnership purposes. Contemporaneous with the Crestwood Holdings Transactions described in Note 1, Crestwood Midstream entered into the Third Amendment to its credit agreement in order to, among other things, permit the borrowings under the CMLP Credit Facility to fund the Crestwood Holdings Transactions and revise the definition of Change in Control in the CMLP Credit Agreement as it relates to the control of CEQP’s general partner). The other covenants and restrictive provisions under the amended credit agreement are materially consistent with the covenants that existed at December 31, 2020.

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, 2021, the net debt to consolidated EBITDA ratio was approximately 3.45 to 1.0, the consolidated EBITDA to consolidated interest expense ratio was approximately 4.98 to 1.0, and the senior secured leverage ratio was 0.42 to 1.0.

At September 30, 2021, Crestwood Midstream had $985.3 million of available capacity under its credit facility considering the most restrictive debt covenants in its credit agreement. At September 30, 2021 and December 31, 2020, Crestwood Midstream’s outstanding standby letters of credit were $14.2 million and $23.9 million. Borrowings under the credit facility accrue interest at prime or Eurodollar based rates plus applicable spreads, which resulted in interest rates between 2.34% and 4.50% at September 30, 2021 and 2.40% and 4.50% at December 31, 2020. The weighted-average interest rate on outstanding borrowings as of September 30, 2021 and December 31, 2020 was 2.41% and 2.45%.

Senior Notes

2029 Senior Notes. In January 2021, Crestwood Midstream issued $700 million of 6.00% unsecured senior notes due 2029 (the 2029 Senior Notes). The 2029 Senior Notes will mature on February 1, 2029, and interest is payable semi-annually in arrears on February 1 and August 1 of each year, beginning on August 1, 2021. The net proceeds from this offering of approximately $691.0 million were used to repay a portion of the 2023 Senior Notes and to repay indebtedness under the CMLP Credit Facility.

2023 Senior Note Repayments. During the nine months ended September 30, 2021, we redeemed $687.2 million of principal outstanding under our 2023 Senior Notes. In conjunction with the repayment of the notes, we recognized a loss on extinguishment of debt of approximately $6.7 million during the nine months ended September 30, 2021, and paid approximately $8.6 million of accrued interest on the 2023 Senior Notes on the dates they were repurchased. We funded the

repayment using a portion of the proceeds from the issuance of the 2029 Senior Notes and borrowings under the CMLP Credit Facility.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2021

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. During the three months ended September 30, 2021, we paid approximately $19.5 million to Linde related to this matter, and Linde claims remaining unpaid invoices of approximately $36 million, along with 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, 2021 and December 31, 2020, we had approximately $16.6 million and $10.4 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 2019, we experienced produced water releases on our Arrow water gathering system located within the Fort Berthold Indian Reservation in North Dakota. In January 2021, we received a Notice of Violation and Opportunity to Confer from the Environmental Protection Agency (EPA) related to the water releases. In March 2021, we executed a Consent Agreement with the EPA and agreed to pay $0.1 million for penalties related to the water releases. The EPA provided the public a 30-day period to comment on the Consent Agreement and is currently reviewing the comments received. We expect to finalize and settle the Consent Agreement after the EPA completes its review and response, if necessary, to the comments received. We are also substantially complete with all remediation efforts related to the water releases and continue to monitor any remaining impacts. We will continue our remediation efforts to ensure that lands impacted by the produced water releases are fully remediated. In response to the water releases, we removed several miles of gathering pipeline from the system that remained in service and replaced those sections with a pipeline composed of higher capacity material that is more suitable to the environment and climate conditions in the Bakken. The replaced pipeline increased water gathering capacity on the Arrow

system and furthers our commitment to sustainability and environmental stewardship in the areas where we live and operate. We believe these events are insurable under our policies. We have not recorded an insurance receivable as of September 30, 2021.

At September 30, 2021 and December 31, 2020, our accrual of approximately $1.2 million and $1.3 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 $1.2 million to $1.9 million at September 30, 2021.

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 previously disposed of 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, 2021 and December 31, 2020 (in millions):

	CEQP				CMLP
	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Self-insurance reserves(1)	$	6.7	$	7.7	$	5.8	$	6.7

(1)At September 30, 2021, CEQP and CMLP classified approximately $4.8 million and $4.1 million, respectively, of these reserves as other long-term liabilities on their consolidated balance sheets.

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, 2021 and December 31, 2020, we have no amounts accrued for these guarantees.

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Leases

9 Months Ended

Sep. 30, 2021

Leases [Abstract]

Leases

Leases

The following table summarizes the balance sheet information related to our operating and finance leases at September 30, 2021 and December 31, 2020 (in millions):

	September 30, 2021		December 31, 2020
Operating Leases
Operating lease right-of-use assets, net	$	31.1	$	36.8
Accrued expenses and other liabilities	$	14.5	$	14.7
Other long-term liabilities	22.0		28.5
Total operating lease liabilities	$	36.5	$	43.2
Finance Leases
Property, plant and equipment	$	12.1	$	13.3
Less: accumulated depreciation	8.5		7.9
Property, plant and equipment, net	$	3.6	$	5.4
Accrued expenses and other liabilities	$	2.1	$	2.9
Other long-term liabilities	1.2		1.9
Total finance lease liabilities	$	3.3	$	4.8

Lease expense. Our operating lease expense, net totaled $3.7 million and $5.8 million for the three months ended September 30, 2021 and 2020 and $12.8 million and $20.4 million for the nine months ended September 30, 2021 and 2020. Our finance lease expense totaled $0.8 million and $0.9 million for the three months ended September 30, 2021 and 2020 and $2.6 million and $3.1 million for the nine months ended September 30, 2021 and 2020.

Lessee, Finance Leases

Leases

The following table summarizes the balance sheet information related to our operating and finance leases at September 30, 2021 and December 31, 2020 (in millions):

	September 30, 2021		December 31, 2020
Operating Leases
Operating lease right-of-use assets, net	$	31.1	$	36.8
Accrued expenses and other liabilities	$	14.5	$	14.7
Other long-term liabilities	22.0		28.5
Total operating lease liabilities	$	36.5	$	43.2
Finance Leases
Property, plant and equipment	$	12.1	$	13.3
Less: accumulated depreciation	8.5		7.9
Property, plant and equipment, net	$	3.6	$	5.4
Accrued expenses and other liabilities	$	2.1	$	2.9
Other long-term liabilities	1.2		1.9
Total finance lease liabilities	$	3.3	$	4.8

Lease expense. Our operating lease expense, net totaled $3.7 million and $5.8 million for the three months ended September 30, 2021 and 2020 and $12.8 million and $20.4 million for the nine months ended September 30, 2021 and 2020. Our finance lease expense totaled $0.8 million and $0.9 million for the three months ended September 30, 2021 and 2020 and $2.6 million and $3.1 million for the nine months ended September 30, 2021 and 2020.

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Partners' Capital

9 Months Ended

Sep. 30, 2021

Statement of Partners' Capital [Abstract]

Partners' Capital

Partners’ Capital and Non-Controlling Partner

Common and Subordinated Units

In conjunction with the Crestwood Holdings Transactions discussed in Note 1, in March 2021, CEQP acquired approximately 11.5 million CEQP common units and 0.4 million subordinated units of CEQP from Crestwood Holdings for approximately $268 million. CEQP reflected the purchase price as a reduction to its common unitholders’ partners’ capital in its consolidated statement of partners’ capital during the first quarter of 2021. The Crestwood Holdings Transactions resulted in CEQP retiring the common and subordinated units acquired from Crestwood Holdings. Transaction costs related to the Crestwood Holdings Transactions of approximately $7.6 million are reflected as a reduction of CEQP’s common unitholders’ partners’ capital in its consolidated statement of partners’ capital during the first quarter of 2021.

Distributions

Crestwood Equity

Limited Partners. A summary of CEQP’s limited partner quarterly cash distributions for the nine months ended September 30, 2021 and 2020 is presented below:

Record Date	Payment Date	Per Unit Rate		Cash Distributions (in millions)
2021
February 5, 2021	February 12, 2021	$	0.625	$	46.4
May 7, 2021	May 14, 2021	$	0.625	39.3
August 6, 2021	August 13, 2021	$	0.625	39.3
				$	125.0
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

On October 14, 2021, we declared a distribution of $0.625 per limited partner unit to be paid on November 12, 2021 to unitholders of record on November 5, 2021 with respect to the quarter ended September 30, 2021.

Preferred Unitholders. During the nine months ended September 30, 2021 and 2020, we paid cash distributions to our preferred unitholders of approximately $45 million in both periods. On October 14, 2021, the board of directors of our general partner authorized a cash distribution to our preferred unitholders of approximately $15 million for the quarter ended September 30, 2021.

Crestwood Midstream

During the nine months ended September 30, 2021 and 2020, Crestwood Midstream paid cash distributions of $451.3 million and $180.9 million to its partners.

Non-Controlling Partner

Crestwood Niobrara issued preferred interests to CN Jackalope Holdings LLC (Jackalope Holdings), which are reflected as non-controlling interest in subsidiary apart from partners’ capital (i.e., temporary equity) on our consolidated balance sheets. 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, 2021 and 2020 (in millions):

Balance at December 31, 2020	$	432.7
Contributions from non-controlling partner	1.0
Distributions to non-controlling partner	(29.9)
Net income attributable to non-controlling partner	30.7
Balance at September 30, 2021	$	434.5

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

In October 2021, Crestwood Niobrara paid cash distributions to Jackalope Holdings of approximately $10.3 million for the quarter ended September 30, 2021.

Other

In February 2021, Crestwood Equity issued 50,000 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, 2021, we had total unamortized compensation expense of approximately $0.9 million related to these performance units. During the three and nine months ended September 30, 2021, we recognized compensation expense of $0.1 million and $0.2 million related to these performance units, which is included in general and administrative expenses on our consolidated statements of operations.

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Earnings Per Limited Partner Unit

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Earnings Per Limited Partner Unit

Earnings Per Limited Partner Unit

Prior to the Crestwood Holdings transactions, we calculated basic net income per limited partner unit using the two-class method. Our income (loss) was allocated to our common units and other participating securities (i.e., subordinated units) based on the amount of dividends paid in the current period plus an allocation of the undistributed earnings or excess distributions over earnings to the extent that each security participates in income (loss) or excess distributions over income (loss). The dilutive effect of the stock-based compensation performance units is calculated using the treasury stock method which considers the impact to net income or loss attributable to Crestwood Equity Partners and limited partner units from the potential issuance of limited partner units. The dilutive effect of the preferred units and Crestwood Niobrara preferred units are calculated using the if-converted method which assumes units are converted at the beginning of the period (beginning with their respective issuance date), and the resulting common units are included in the denominator of the diluted net income per common unit calculation for the period being presented. Distributions declared in the period and undeclared distributions that accumulated during the period are added back to the numerator for purposes of the if-converted calculation.

We exclude potentially dilutive securities from the determination of diluted earnings per unit (as well as their related income statement impacts) when their impact is anti-dilutive. The following table summarizes information regarding the weighted-average of common units excluded during the three and nine months ended September 30, 2021 and 2020 (in millions):

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2021	2020	2021	2020
Preferred units (1)	7.1	7.1	7.1	7.1
Crestwood Niobrara’s preferred units(1)	3.9	8.7	3.9	8.7
Unit-based compensation performance units(1)	0.2	0.2	0.1	0.3
Subordinated units(1)(2)	—	0.4	0.1	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 2020 Annual Report on Form 10-K.

(2)In conjunction with the Crestwood Holdings Transactions, in March 2021, CEQP retired the subordinated units. For additional information regarding the retirement of the subordinated units, see Note 1 and Note 11.

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Segments

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

Segments

Segments

We have three operating and reportable segments: (i) gathering and processing; (ii) storage and transportation; and (iii) marketing, supply and logistics. Our corporate operations include all general and administrative expenses that are not allocated to our reportable segments. For a further description of our operating and reporting segments, see Note 1. We assess the performance of our operating segments based on EBITDA, which is defined as income before income taxes, plus debt-related costs (interest and debt expense, net and loss on modification/extinguishment of debt) and depreciation, amortization and accretion expense.

Below is a reconciliation of CEQP’s and CMLP’s net loss to EBITDA (in millions):

	CEQP								CMLP
	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
	2021		2020		2021		2020		2021		2020		2021		2020
Net income (loss)	$	(39.6)	$	4.6	$	(116.0)	$	(43.1)	$	(41.8)	$	2.3	$	(120.7)	$	(50.1)
Add:
Interest and debt expense, net	30.9		33.7		102.0		100.3		30.9		33.7		102.0		100.3
Loss on modification/extinguishment of debt	—		—		6.7		—		—		—		6.7		—
Provision (benefit) for income taxes	0.1		—		0.1		(0.1)		0.1		—		0.1		(0.2)
Depreciation, amortization and accretion	64.6		60.8		182.6		177.9		68.2		64.2		193.2		188.4
EBITDA	$	56.0	$	99.1	$	175.4	$	235.0	$	57.4	$	100.2	$	181.3	$	238.4

The following tables summarize CEQP’s and CMLP’s reportable segment data for the three and nine months ended September 30, 2021 and 2020 (in millions). Intersegment revenues included in the following tables are accounted for as arms-length transactions that apply our revenue recognition policy described in our 2020 Annual Report on Form 10-K. Included in earnings (loss) from unconsolidated affiliates, net reflected in the tables below was approximately $4.9 million and $9.9 million of our proportionate share of interest expense, depreciation and amortization expense, goodwill impairments and gains (losses) on long-lived assets, net recorded by our equity investments for the three months ended September 30, 2021 and 2020 and $182.4 million and $33.2 million for the nine months ended September 30, 2021 and 2020.

Segment EBITDA Information

	Three Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
Revenues	$	171.2	$	2.0	$	1,053.1	$	—	$	1,226.3
Intersegment revenues	125.6		2.3		(127.9)		—		—
Costs of product/services sold	150.1		(0.2)		949.4		—		1,099.3
Operations and maintenance expense	19.5		1.5		10.6		—		31.6
General and administrative expense	—		—		—		24.4		24.4
Loss on long-lived assets, net	(18.5)		—		—		—		(18.5)
Earnings from unconsolidated affiliates, net	4.2		0.7		—		—		4.9
Crestwood Midstream EBITDA	$	112.9	$	3.7	$	(34.8)	$	(24.4)	$	57.4
Crestwood Equity
General and administrative expense	—		—		—		1.5		1.5
Other income, net	—		—		—		0.1		0.1
Crestwood Equity EBITDA	$	112.9	$	3.7	$	(34.8)	$	(25.8)	$	56.0

	Three Months Ended September 30, 2020
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
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
Crestwood Midstream EBITDA	$	88.9	$	14.7	$	14.9	$	(18.3)	$	100.2
Crestwood Equity
General and administrative expense	—		—		—		1.1		1.1
Crestwood Equity EBITDA	$	88.9	$	14.7	$	14.9	$	(19.4)	$	99.1

	Nine Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
Revenues	$	498.9	$	6.0	$	2,683.7	$	—	$	3,188.6
Intersegment revenues	315.1		7.8		(322.9)		—		—
Costs of product/services sold	387.2		(0.2)		2,323.3		—		2,710.3
Operations and maintenance expense	55.6		3.1		31.5		—		90.2
General and administrative expense	—		—		—		61.3		61.3
Gain (loss) on long-lived assets, net	(19.7)		—		0.1		—		(19.6)
Earnings (loss) from unconsolidated affiliates, net	4.4		(130.3)		—		—		(125.9)
Crestwood Midstream EBITDA	$	355.9	$	(119.4)	$	6.1	$	(61.3)	$	181.3
Crestwood Equity
General and administrative expense	—		—		—		6.1		6.1
Other income, net	—		—		—		0.2		0.2
Crestwood Equity EBITDA	$	355.9	$	(119.4)	$	6.1	$	(67.2)	$	175.4

	Nine Months Ended September 30, 2020
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
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
Crestwood Midstream EBITDA	$	211.6	$	38.0	$	49.0	$	(60.2)	$	238.4
Crestwood Equity
General and administrative expense	—		—		—		3.6		3.6
Other income, net	—		—		—		0.2		0.2
Crestwood Equity EBITDA	$	211.6	$	38.0	$	49.0	$	(63.6)	$	235.0

Other Segment Information

	CEQP				CMLP
	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Total Assets
Gathering and Processing	$	3,357.4	$	3,464.6	$	3,491.9	$	3,609.7
Storage and Transportation	163.6		944.6		163.6		944.6
Marketing, Supply and Logistics	1,032.8		805.0		1,032.8		805.0
Corporate	20.7		29.5		17.3		26.2
Total Assets	$	4,574.5	$	5,243.7	$	4,705.6	$	5,385.5

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Revenues

9 Months Ended

Sep. 30, 2021

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 accounted for under Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) totaled $350.0 million and $219.9 million for both CEQP and CMLP at September 30, 2021 and December 31, 2020, 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, 2021		December 31, 2020
Contract assets (non-current)	$	1.4	$	1.0
Contract liabilities (current)(1)	$	10.8	$	10.3
Contract liabilities (non-current)(1)	$	183.4	$	172.2

(1)During the three and nine months ended September 30, 2021, we recognized revenues of approximately $3.4 million and $9.8 million that were previously included in contract liabilities at December 31, 2020. The remaining change in our contract liabilities during the three and nine months ended September 30, 2021, 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, 2021 (in millions):

Remainder of 2021	$	23.3
2022	75.4
2023	52.6
2024	31.7
Total	$	183.0

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, 2021 and 2020 (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. Our non-Topic 606 revenues presented in the tables below primarily represents revenues related to our commodity-based derivatives.

	Three Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Intersegment Elimination		Total
Topic 606 revenues
Gathering
Natural gas	$	35.3	$	—	$	—	$	—	$	35.3
Crude oil	17.1		—		—		—		17.1
Water	24.8		—		—		—		24.8
Processing
Natural gas	7.2		—		—		—		7.2
Compression
Natural gas	3.7		—		—		—		3.7
Storage
Crude oil	0.1		0.4		—		(0.4)		0.1
NGLs	—		—		2.6		—		2.6
Pipeline
Crude oil	—		1.5		—		(0.9)		0.6
Transportation
Crude oil	0.8		—		—		(0.1)		0.7
NGLs	—		—		4.1		—		4.1
Rail Loading
Crude oil	—		2.2		—		(1.0)		1.2
Product Sales
Natural gas	42.9		—		84.5		(42.7)		84.7
Crude oil	105.4		—		331.3		(25.1)		411.6
NGLs	59.1		—		500.1		(57.6)		501.6
Other	—		0.2		0.4		(0.1)		0.5
Total Topic 606 revenues	296.4		4.3		923.0		(127.9)		1,095.8
Non-Topic 606 revenues	0.4		—		130.1		—		130.5
Total revenues	$	296.8	$	4.3	$	1,053.1	$	(127.9)	$	1,226.3

	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	—		—		32.9		—		32.9
Total revenues	$	190.1	$	5.4	$	370.5	$	(46.8)	$	519.2

	Nine Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Intersegment Elimination		Total
Topic 606 revenues
Gathering
Natural gas	$	100.0	$	—	$	—	$	—	$	100.0
Crude oil	56.2		—		—		—		56.2
Water	69.5		—		—		—		69.5
Processing
Natural gas	21.5		—		—		—		21.5
Compression
Natural gas	12.1		—		—		—		12.1
Storage
Crude oil	0.3		1.9		—		(1.8)		0.4
NGLs	—		—		8.7		—		8.7
Pipeline
Crude oil	—		4.5		—		(2.5)		2.0
NGLs	—		—		0.1		—		0.1
Transportation
Crude oil	1.9		—		—		(0.1)		1.8
NGLs	—		—		12.5		—		12.5
Rail Loading
Crude oil	—		6.8		—		(3.4)		3.4
Product Sales
Natural gas	112.5		—		224.4		(111.7)		225.2
Crude oil	297.1		—		926.9		(62.5)		1,161.5
NGLs	142.3		—		1,210.9		(140.5)		1,212.7
Other	—		0.6		1.2		(0.4)		1.4
Total Topic 606 revenues	813.4		13.8		2,384.7		(322.9)		2,889.0
Non-Topic 606 revenues	0.6		—		299.0		—		299.6
Total revenues	$	814.0	$	13.8	$	2,683.7	$	(322.9)	$	3,188.6

	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	—		—		126.5		—		126.5
Total revenues	$	573.8	$	17.0	$	1,115.1	$	(106.1)	$	1,599.8

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Related Party Transactions

9 Months Ended

Sep. 30, 2021

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

Prior to August 2021, Crestwood Holdings indirectly owned our general partner and the affiliates of Crestwood Holdings and its owners were considered CEQP’s and CMLP’s related parties. With the completion of the Crestwood Holdings Transactions in August 2021, Crestwood Holdings and its affiliates are no longer considered related parties of CEQP and CMLP. We enter into transactions with our affiliates within the ordinary course of business, including 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, 2021 and 2020, we paid approximately $0.6 million and $3.2 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 2020 Annual Report on Form 10-K.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Revenues at CEQP and CMLP(1)	$	7.1	$	10.9	$	25.2	$	25.9
Costs of product/services sold at CEQP and CMLP(2)	$	34.8	$	6.1	$	101.3	$	12.9
Operations and maintenance expenses charged by CEQP and CMLP(3)	$	5.1	$	5.0	$	16.8	$	16.7
General and administrative expenses charged by CEQP to CMLP, net(4)	$	11.9	$	7.4	$	24.4	$	25.4
General and administrative expenses at CEQP charged to Crestwood Holdings, net(5)	$	—	$	1.2	$	4.8	$	12.5

(1)Primarily relates to the sale of NGLs to a subsidiary of Crestwood Permian.

(2)Includes (i) $30.4 million and $75.5 million during the three and nine months ended September 30, 2021 and $5.7 million and $12.1 million during the three and nine months ended September 30, 2020 related to purchases of natural gas and NGLs from a subsidiary of Crestwood Permian; (ii) $0.2 million and $11.3 million during the three and nine months ended September 30, 2021 and $0.3 million and $0.4 million during the three and nine months ended September 30, 2020 related to purchases of natural gas from a subsidiary of Tres Holdings and (iii) $4.2 million and $14.5 million during the three and nine months ended September 30, 2021 and $0.1 million and $0.4 million during the three and nine months ended September 30, 2020 related to purchases of NGLs from Ascent Resources - Utica, 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, 2021, we charged $0.1 million and $3.4 million to Stagecoach Gas, $1.2 million and $3.6 million to Tres Holdings, and $3.8 million and $9.8 million to Crestwood Permian. 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.

(4)Includes $12.9 million and $27.4 million of unit-based compensation charges allocated from CEQP to CMLP for the three and nine months ended September 30, 2021 and $8.4 million and $28.5 million for the three and nine months ended September 30, 2020. In addition, includes $1.0 million and $3.0 million of CMLP’s general and administrative costs allocated to CEQP during the three and nine months ended September 30, 2021 and $1.0 million and $3.1 million during the three and nine months ended September 30, 2020.

(5)Includes a $0.3 million reduction of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three months ended September 30, 2020. Also includes a $4.6 million and a $11.2 million reduction of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the nine months ended September 30, 2021 and 2020. During the three months ended September 30, 2021, there were no unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP. CEQP allocates a portion of its general and administrative costs to Crestwood Holdings and during the nine months ended September 30, 2021, CEQP allocated $0.2 million of it’s general and administrative costs to Crestwood Holdings and approximately $0.9 million and $1.3 million of costs were allocated to Crestwood Holdings during the three and nine months ended September 30, 2020. During the three months ended September 30, 2021, CEQP did not allocate any general and administrative costs to Crestwood Holdings.

The following table shows accounts receivable and accounts payable with our affiliates (in millions):

	September 30, 2021		December 31, 2020
Accounts receivable at CEQP and CMLP	$	7.3	$	2.5
Accounts payable at CEQP(1)	$	13.1	$	7.5
Accounts payable at CMLP	$	13.1	$	5.0

(1)In conjunction with the Crestwood Holdings Transactions discussed in Note 1, CEQP eliminated approximately $2.4 million of accounts payable to Crestwood Holdings which is reflected as an increase to CEQP’s common unitholders’ partners’ capital in its consolidated statement of partners’ capital during the first quarter of 2021.

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Subsequent Event	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Event	Subsequent EventOn October 25, 2021, we entered into a merger agreement with Oasis Midstream Partners LP (Oasis Midstream) under which we will acquire Oasis Midstream in an equity and cash transaction valued at approximately $1.8 billion. Pursuant to the merger agreement, Oasis Petroleum Inc. (Oasis Petroleum) will receive $150 million in cash plus 21.0 million newly issued CEQP common units in exchange for its 33.8 million common units held in Oasis Midstream. In addition, Oasis Midstream’s public unitholders will receive 12.9 million newly issued CEQP common units in exchange for the 14.8 million Oasis Midstream common units held by them. Additionally, under the merger agreement, Oasis Petroleum will receive a $10 million cash payment for its ownership of the general partner of Oasis Midstream. The completion of the merger is subject to the satisfaction or waiver of customary closing conditions, including, among others: (i) adoption of the merger agreement by holders of a majority of the outstanding Oasis Midstream common units, (ii) expiration or termination of review under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 and (iii) effectiveness of a registration statement on Form S-4 in connection with the issuance of CEQP common units in the merger.

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Basis of Presentation and Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Basis of Accounting, Policy

Significant Accounting Policies

There were no material changes in our significant accounting policies from those described in our 2020 Annual Report on Form 10-K. Below is an update of our accounting policies related to Property, Plant and Equipment and Goodwill.

During the three months ended September 30, 2021, we recorded a loss on long-lived assets of approximately $19 million related to the abandonment and dismantlement of certain of our gathering and processing segment’s Marcellus West Union compressor station assets. Our West Union compressor station assets were located in West Virginia and provided compression and dehydration services to our customers. During the three months ended September 30, 2020, we recorded a $19.9 million loss on long-lived assets related to the sale of our Fayetteville assets in October 2020 and during the nine months ended September 30, 2020 we recorded an $80.3 million full impairment of the goodwill associated with our Powder River Basin reporting unit based on events that occurred during 2020 which resulted in a significant decrease in the forecasted cash flows and fair value of the reporting unit. For a further discussion of this goodwill impairment, see our 2020 Annual Report on Form 10-K.

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Certain Balance Sheet Information (Tables)

9 Months Ended

Sep. 30, 2021

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,
	2021		2020		2021		2020
Accrued expenses	$	51.1	$	48.3	$	49.9	$	46.4
Accrued property taxes	6.9		8.4		6.9		8.4
Income tax payable	0.3		0.2		0.3		0.2
Interest payable	36.7		24.9		36.7		24.9
Accrued additions to property, plant and equipment	18.1		12.3		18.1		12.3
Operating leases	14.5		14.7		14.5		14.7
Finance leases	2.1		2.9		2.1		2.9
Deferred revenue	10.8		10.3		10.8		10.3
Total accrued expenses and other liabilities	$	140.5	$	122.0	$	139.3	$	120.1

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,
	2021		2020		2021		2020
Contract liabilities	$	183.4	$	172.2	$	183.4	$	172.2
Operating leases	22.0		28.5		22.0		28.5
Asset retirement obligations	35.6		34.1		35.6		34.1
Other	18.8		18.5		15.6		17.0
Total other long-term liabilities	$	259.8	$	253.3	$	256.6	$	251.8

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Investments in Unconsolidated Affiliates (Tables)

9 Months Ended

Sep. 30, 2021

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments

Net Investments and Earnings (Loss) of Unconsolidated Affiliates

Our net investments in and earnings (loss) from our unconsolidated affiliates are as follows (in millions):

	Investment				Earnings (Loss) from Unconsolidated Affiliates				Earnings (Loss) from Unconsolidated Affiliates
					Three Months Ended				Nine Months Ended
	September 30,		December 31,		September 30,				September 30,
	2021		2020		2021		2020		2021		2020
Stagecoach Gas Services LLC(1)	$	15.2	$	792.5	$	0.9	$	9.9	$	(139.4)	$	28.3
Tres Palacios Holdings LLC(2)	38.4		35.5		(0.1)		0.1		9.1		0.2
Powder River Basin Industrial Complex, LLC(3)	3.5		3.6		(0.1)		—		—		(4.4)
Crestwood Permian Basin Holdings LLC(4)	110.9		112.1		4.2		0.5		4.4		0.3
Total	$	168.0	$	943.7	$	4.9	$	10.5	$	(125.9)	$	24.4

(1)As of September 30, 2021, our equity in the underlying net assets of Stagecoach Gas approximates the carrying value of our investment.

(2)As of September 30, 2021, our equity in the underlying net assets of Tres Palacios Holdings LLC (Tres Holdings) exceeded the carrying value of our investment balance by approximately $21.8 million. During both the three and nine months ended September 30, 2021 and 2020, we recorded amortization of approximately $0.3 million and $0.9 million, respectively, related to this excess basis, which is reflected as an increase in our earnings from unconsolidated affiliates in our consolidated statements of operations. Our Tres Holdings investment is included in our storage and transportation segment.

(3)As of September 30, 2021, our equity in the underlying net assets of Powder River Basin Industrial Complex, LLC (PRBIC) approximates the carrying value of 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.

(4)As of September 30, 2021, our equity in the underlying net assets of Crestwood Permian exceeded our investment balance by $7.5 million, and this excess amount is not subject to amortization. Our Crestwood Permian investment is included in our gathering and processing segment and is no longer considered a variable interest entity.

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,
	2021						2020
	Operating Revenues		Operating Expenses		Net Income (Loss)		Operating Revenues		Operating Expenses		Net Income (Loss)
Stagecoach Gas	$	81.4	$	456.9	$	(375.5)	$	115.3	$	58.9	$	56.5
Other(1)	232.4		208.2		24.9		91.2		113.0		(21.0)
Total	$	313.8	$	665.1	$	(350.6)	$	206.5	$	171.9	$	35.5

(1)Includes our Tres Holdings, PRBIC and Crestwood Permian equity investments.

Distributions and Contributions

The following table summarizes our distributions from and contributions to our unconsolidated affiliates (in millions):

	Distributions(1)				Contributions
	Nine Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Stagecoach Gas	$	640.9	$	44.5	$	—	$	—
Tres Holdings	13.1		4.4		6.9		6.0
PRBIC	0.1		0.2		—		—
Crestwood Permian	8.9		8.5		3.3		—
Total	$	663.0	$	57.6	$	10.2	$	6.0

(1)    In July 2021, Stagecoach Gas closed on the sale of certain of its wholly-owned subsidiaries to a subsidiary of Kinder Morgan and distributed to us approximately $613.9 million as our proportionate share of the gross proceeds received from the sale. We utilized approximately $3 million of these proceeds to pay transaction costs related to the sale described above, $40 million of these proceeds to pay our remaining contingent consideration obligation and related accrued interest described below, and the remaining proceeds to repay a portion of the amounts outstanding under the Crestwood Midstream credit facility. In October 2021, we received cash distributions from Tres Holdings and Crestwood Permian of approximately $2.4 million and $7.4 million, respectively.

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Risk Management (Tables)

9 Months Ended

Sep. 30, 2021

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 during the three and nine months ended September 30, 2021 and 2020 (in millions):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Product revenues	$	129.4	$	32.4	$	296.9	$	125.4
Gain (loss) reflected in product costs	$	(53.4)	$	(1.8)	$	(94.8)	$	13.4

Notional Amounts And Terms Of Company's Derivative Financial Instruments

The notional amounts of our derivative financial instruments include the following:

	September 30, 2021		December 31, 2020
	Fixed Price Payor	Fixed Price Receiver	Fixed Price Payor	Fixed Price Receiver
Propane, ethane, butane, heating oil and crude oil (MMBbls)	73.9	78.4	72.7	76.5
Natural gas (Bcf)	32.1	42.8	22.6	28.6

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, 2021		December 31, 2020
Aggregate fair value liability of derivative instruments with credit-risk-related contingent features(1)	$	157.6	$	38.5
Broker-related net derivative asset position	$	199.6	$	35.9
Broker-related cash collateral received	$	163.9	$	18.3
Cash collateral received, net	$	14.3	$	12.4

(1)At September 30, 2021 and December 31, 2020, we posted $1.1 million and less than $0.1 million of collateral associated with these derivatives.

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

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, 2021 and December 31, 2020 (in millions):

	September 30, 2021
	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	$	74.2	$	1,469.0	$	—	$	1,543.2	$	(1,339.6)	$	(164.5)	$	39.1
Suburban Propane Partners, L.P. units(2)	2.2		—		—		2.2		—		—		2.2
Total assets at fair value	$	76.4	$	1,469.0	$	—	$	1,545.4	$	(1,339.6)	$	(164.5)	$	41.3
Liabilities
Liabilities from price risk management	$	55.8	$	1,547.4	$	—	$	1,603.2	$	(1,339.6)	$	13.7	$	277.3
Total liabilities at fair value	$	55.8	$	1,547.4	$	—	$	1,603.2	$	(1,339.6)	$	13.7	$	277.3

	December 31, 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	$	20.2	$	480.5	$	—	$	500.7	$	(455.0)	$	(18.5)	$	27.2
Suburban Propane Partners, L.P. units(2)	2.1		—		—		2.1		—		—		2.1
Total assets at fair value	$	22.3	$	480.5	$	—	$	502.8	$	(455.0)	$	(18.5)	$	29.3
Liabilities
Liabilities from price risk management	$	25.1	$	494.0	$	—	$	519.1	$	(455.0)	$	12.2	$	76.3
Total liabilities at fair value	$	25.1	$	494.0	$	—	$	519.1	$	(455.0)	$	12.2	$	76.3

(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 non-current assets on CEQP’s consolidated balance sheets.

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, 2021				December 31, 2020
	Carrying  Amount		Fair Value		Carrying  Amount		Fair Value
2023 Senior Notes	$	—	$	—	$	683.8	$	691.5
2025 Senior Notes	$	496.3	$	511.9	$	495.5	$	509.9
2027 Senior Notes	$	594.0	$	618.4	$	593.2	$	594.1
2029 Senior Notes	$	690.5	$	734.0	$	—	$	—

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Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Components Of Long-Term Debt

Long-term debt consisted of the following at September 30, 2021 and December 31, 2020 (in millions):

	September 30, 2021		December 31, 2020
Credit Facility	$	250.5	$	719.0
2023 Senior Notes	—		687.2
2025 Senior Notes	500.0		500.0
2027 Senior Notes	600.0		600.0
2029 Senior Notes	700.0		—
Other(1)	0.2		0.4
Less: deferred financing costs, net	25.6		22.6
Total debt	2,025.1		2,484.0
Less: current portion	0.2		0.2
Total long-term debt, less current portion	$	2,024.9	$	2,483.8

(1)Represents non-interest bearing obligations related to certain companies acquired in 2014 with payments due through 2022.

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021 and December 31, 2020 (in millions):

	CEQP				CMLP
	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Self-insurance reserves(1)	$	6.7	$	7.7	$	5.8	$	6.7

(1)At September 30, 2021, CEQP and CMLP classified approximately $4.8 million and $4.1 million, respectively, of these reserves as other long-term liabilities on their consolidated balance sheets.

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Leases (Tables)

9 Months Ended

Sep. 30, 2021

Leases [Abstract]

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, 2021 and December 31, 2020 (in millions):

	September 30, 2021		December 31, 2020
Operating Leases
Operating lease right-of-use assets, net	$	31.1	$	36.8
Accrued expenses and other liabilities	$	14.5	$	14.7
Other long-term liabilities	22.0		28.5
Total operating lease liabilities	$	36.5	$	43.2
Finance Leases
Property, plant and equipment	$	12.1	$	13.3
Less: accumulated depreciation	8.5		7.9
Property, plant and equipment, net	$	3.6	$	5.4
Accrued expenses and other liabilities	$	2.1	$	2.9
Other long-term liabilities	1.2		1.9
Total finance lease liabilities	$	3.3	$	4.8

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Partners' Capital (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021 and 2020 is presented below:

Record Date	Payment Date	Per Unit Rate		Cash Distributions (in millions)
2021
February 5, 2021	February 12, 2021	$	0.625	$	46.4
May 7, 2021	May 14, 2021	$	0.625	39.3
August 6, 2021	August 13, 2021	$	0.625	39.3
				$	125.0
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

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, 2021 and 2020 (in millions):

Balance at December 31, 2020	$	432.7
Contributions from non-controlling partner	1.0
Distributions to non-controlling partner	(29.9)
Net income attributable to non-controlling partner	30.7
Balance at September 30, 2021	$	434.5

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

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Earnings Per Limited Partner Unit (Tables)

9 Months Ended

Sep. 30, 2021

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 common units excluded during the three and nine months ended September 30, 2021 and 2020 (in millions):

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2021	2020	2021	2020
Preferred units (1)	7.1	7.1	7.1	7.1
Crestwood Niobrara’s preferred units(1)	3.9	8.7	3.9	8.7
Unit-based compensation performance units(1)	0.2	0.2	0.1	0.3
Subordinated units(1)(2)	—	0.4	0.1	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 2020 Annual Report on Form 10-K.

(2)In conjunction with the Crestwood Holdings Transactions, in March 2021, CEQP retired the subordinated units. For additional information regarding the retirement of the subordinated units, see Note 1 and Note 11.

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Segments (Tables)

9 Months Ended

Sep. 30, 2021

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 and CMLP’s net loss to EBITDA (in millions):

	CEQP								CMLP
	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
	2021		2020		2021		2020		2021		2020		2021		2020
Net income (loss)	$	(39.6)	$	4.6	$	(116.0)	$	(43.1)	$	(41.8)	$	2.3	$	(120.7)	$	(50.1)
Add:
Interest and debt expense, net	30.9		33.7		102.0		100.3		30.9		33.7		102.0		100.3
Loss on modification/extinguishment of debt	—		—		6.7		—		—		—		6.7		—
Provision (benefit) for income taxes	0.1		—		0.1		(0.1)		0.1		—		0.1		(0.2)
Depreciation, amortization and accretion	64.6		60.8		182.6		177.9		68.2		64.2		193.2		188.4
EBITDA	$	56.0	$	99.1	$	175.4	$	235.0	$	57.4	$	100.2	$	181.3	$	238.4

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, 2021 and 2020 (in millions). Intersegment revenues included in the following tables are accounted for as arms-length transactions that apply our revenue recognition policy described in our 2020 Annual Report on Form 10-K. Included in earnings (loss) from unconsolidated affiliates, net reflected in the tables below was approximately $4.9 million and $9.9 million of our proportionate share of interest expense, depreciation and amortization expense, goodwill impairments and gains (losses) on long-lived assets, net recorded by our equity investments for the three months ended September 30, 2021 and 2020 and $182.4 million and $33.2 million for the nine months ended September 30, 2021 and 2020.

Segment EBITDA Information

	Three Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
Revenues	$	171.2	$	2.0	$	1,053.1	$	—	$	1,226.3
Intersegment revenues	125.6		2.3		(127.9)		—		—
Costs of product/services sold	150.1		(0.2)		949.4		—		1,099.3
Operations and maintenance expense	19.5		1.5		10.6		—		31.6
General and administrative expense	—		—		—		24.4		24.4
Loss on long-lived assets, net	(18.5)		—		—		—		(18.5)
Earnings from unconsolidated affiliates, net	4.2		0.7		—		—		4.9
Crestwood Midstream EBITDA	$	112.9	$	3.7	$	(34.8)	$	(24.4)	$	57.4
Crestwood Equity
General and administrative expense	—		—		—		1.5		1.5
Other income, net	—		—		—		0.1		0.1
Crestwood Equity EBITDA	$	112.9	$	3.7	$	(34.8)	$	(25.8)	$	56.0

	Three Months Ended September 30, 2020
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
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
Crestwood Midstream EBITDA	$	88.9	$	14.7	$	14.9	$	(18.3)	$	100.2
Crestwood Equity
General and administrative expense	—		—		—		1.1		1.1
Crestwood Equity EBITDA	$	88.9	$	14.7	$	14.9	$	(19.4)	$	99.1

	Nine Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
Revenues	$	498.9	$	6.0	$	2,683.7	$	—	$	3,188.6
Intersegment revenues	315.1		7.8		(322.9)		—		—
Costs of product/services sold	387.2		(0.2)		2,323.3		—		2,710.3
Operations and maintenance expense	55.6		3.1		31.5		—		90.2
General and administrative expense	—		—		—		61.3		61.3
Gain (loss) on long-lived assets, net	(19.7)		—		0.1		—		(19.6)
Earnings (loss) from unconsolidated affiliates, net	4.4		(130.3)		—		—		(125.9)
Crestwood Midstream EBITDA	$	355.9	$	(119.4)	$	6.1	$	(61.3)	$	181.3
Crestwood Equity
General and administrative expense	—		—		—		6.1		6.1
Other income, net	—		—		—		0.2		0.2
Crestwood Equity EBITDA	$	355.9	$	(119.4)	$	6.1	$	(67.2)	$	175.4

	Nine Months Ended September 30, 2020
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Corporate		Total
Crestwood Midstream
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
Crestwood Midstream EBITDA	$	211.6	$	38.0	$	49.0	$	(60.2)	$	238.4
Crestwood Equity
General and administrative expense	—		—		—		3.6		3.6
Other income, net	—		—		—		0.2		0.2
Crestwood Equity EBITDA	$	211.6	$	38.0	$	49.0	$	(63.6)	$	235.0

Other Segment Information

	CEQP				CMLP
	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Total Assets
Gathering and Processing	$	3,357.4	$	3,464.6	$	3,491.9	$	3,609.7
Storage and Transportation	163.6		944.6		163.6		944.6
Marketing, Supply and Logistics	1,032.8		805.0		1,032.8		805.0
Corporate	20.7		29.5		17.3		26.2
Total Assets	$	4,574.5	$	5,243.7	$	4,705.6	$	5,385.5

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Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021		December 31, 2020
Contract assets (non-current)	$	1.4	$	1.0
Contract liabilities (current)(1)	$	10.8	$	10.3
Contract liabilities (non-current)(1)	$	183.4	$	172.2

(1)During the three and nine months ended September 30, 2021, we recognized revenues of approximately $3.4 million and $9.8 million that were previously included in contract liabilities at December 31, 2020. The remaining change in our contract liabilities during the three and nine months ended September 30, 2021, 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, 2021 (in millions):

Remainder of 2021	$	23.3
2022	75.4
2023	52.6
2024	31.7
Total	$	183.0

Disaggregation of Revenue

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, 2021 and 2020 (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. Our non-Topic 606 revenues presented in the tables below primarily represents revenues related to our commodity-based derivatives.

	Three Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Intersegment Elimination		Total
Topic 606 revenues
Gathering
Natural gas	$	35.3	$	—	$	—	$	—	$	35.3
Crude oil	17.1		—		—		—		17.1
Water	24.8		—		—		—		24.8
Processing
Natural gas	7.2		—		—		—		7.2
Compression
Natural gas	3.7		—		—		—		3.7
Storage
Crude oil	0.1		0.4		—		(0.4)		0.1
NGLs	—		—		2.6		—		2.6
Pipeline
Crude oil	—		1.5		—		(0.9)		0.6
Transportation
Crude oil	0.8		—		—		(0.1)		0.7
NGLs	—		—		4.1		—		4.1
Rail Loading
Crude oil	—		2.2		—		(1.0)		1.2
Product Sales
Natural gas	42.9		—		84.5		(42.7)		84.7
Crude oil	105.4		—		331.3		(25.1)		411.6
NGLs	59.1		—		500.1		(57.6)		501.6
Other	—		0.2		0.4		(0.1)		0.5
Total Topic 606 revenues	296.4		4.3		923.0		(127.9)		1,095.8
Non-Topic 606 revenues	0.4		—		130.1		—		130.5
Total revenues	$	296.8	$	4.3	$	1,053.1	$	(127.9)	$	1,226.3

	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	—		—		32.9		—		32.9
Total revenues	$	190.1	$	5.4	$	370.5	$	(46.8)	$	519.2

	Nine Months Ended September 30, 2021
	Gathering and Processing		Storage and Transportation		Marketing, Supply and Logistics		Intersegment Elimination		Total
Topic 606 revenues
Gathering
Natural gas	$	100.0	$	—	$	—	$	—	$	100.0
Crude oil	56.2		—		—		—		56.2
Water	69.5		—		—		—		69.5
Processing
Natural gas	21.5		—		—		—		21.5
Compression
Natural gas	12.1		—		—		—		12.1
Storage
Crude oil	0.3		1.9		—		(1.8)		0.4
NGLs	—		—		8.7		—		8.7
Pipeline
Crude oil	—		4.5		—		(2.5)		2.0
NGLs	—		—		0.1		—		0.1
Transportation
Crude oil	1.9		—		—		(0.1)		1.8
NGLs	—		—		12.5		—		12.5
Rail Loading
Crude oil	—		6.8		—		(3.4)		3.4
Product Sales
Natural gas	112.5		—		224.4		(111.7)		225.2
Crude oil	297.1		—		926.9		(62.5)		1,161.5
NGLs	142.3		—		1,210.9		(140.5)		1,212.7
Other	—		0.6		1.2		(0.4)		1.4
Total Topic 606 revenues	813.4		13.8		2,384.7		(322.9)		2,889.0
Non-Topic 606 revenues	0.6		—		299.0		—		299.6
Total revenues	$	814.0	$	13.8	$	2,683.7	$	(322.9)	$	3,188.6

	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	—		—		126.5		—		126.5
Total revenues	$	573.8	$	17.0	$	1,115.1	$	(106.1)	$	1,599.8

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Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2021

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 2020 Annual Report on Form 10-K.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Revenues at CEQP and CMLP(1)	$	7.1	$	10.9	$	25.2	$	25.9
Costs of product/services sold at CEQP and CMLP(2)	$	34.8	$	6.1	$	101.3	$	12.9
Operations and maintenance expenses charged by CEQP and CMLP(3)	$	5.1	$	5.0	$	16.8	$	16.7
General and administrative expenses charged by CEQP to CMLP, net(4)	$	11.9	$	7.4	$	24.4	$	25.4
General and administrative expenses at CEQP charged to Crestwood Holdings, net(5)	$	—	$	1.2	$	4.8	$	12.5

(1)Primarily relates to the sale of NGLs to a subsidiary of Crestwood Permian.

(2)Includes (i) $30.4 million and $75.5 million during the three and nine months ended September 30, 2021 and $5.7 million and $12.1 million during the three and nine months ended September 30, 2020 related to purchases of natural gas and NGLs from a subsidiary of Crestwood Permian; (ii) $0.2 million and $11.3 million during the three and nine months ended September 30, 2021 and $0.3 million and $0.4 million during the three and nine months ended September 30, 2020 related to purchases of natural gas from a subsidiary of Tres Holdings and (iii) $4.2 million and $14.5 million during the three and nine months ended September 30, 2021 and $0.1 million and $0.4 million during the three and nine months ended September 30, 2020 related to purchases of NGLs from Ascent Resources - Utica, 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, 2021, we charged $0.1 million and $3.4 million to Stagecoach Gas, $1.2 million and $3.6 million to Tres Holdings, and $3.8 million and $9.8 million to Crestwood Permian. 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.

(4)Includes $12.9 million and $27.4 million of unit-based compensation charges allocated from CEQP to CMLP for the three and nine months ended September 30, 2021 and $8.4 million and $28.5 million for the three and nine months ended September 30, 2020. In addition, includes $1.0 million and $3.0 million of CMLP’s general and administrative costs allocated to CEQP during the three and nine months ended September 30, 2021 and $1.0 million and $3.1 million during the three and nine months ended September 30, 2020.

(5)Includes a $0.3 million reduction of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the three months ended September 30, 2020. Also includes a $4.6 million and a $11.2 million reduction of unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP during the nine months ended September 30, 2021 and 2020. During the three months ended September 30, 2021, there were no unit-based compensation charges allocated from Crestwood Holdings to CEQP and CMLP. CEQP allocates a portion of its general and administrative costs to Crestwood Holdings and during the nine months ended September 30, 2021, CEQP allocated $0.2 million of it’s general and administrative costs to Crestwood Holdings and approximately $0.9 million and $1.3 million of costs were allocated to Crestwood Holdings during the three and nine months ended September 30, 2020. During the three months ended September 30, 2021, CEQP did not allocate any general and administrative costs to Crestwood Holdings.

Schedule of Related Party Receivables and Payables

The following table shows accounts receivable and accounts payable with our affiliates (in millions):

	September 30, 2021		December 31, 2020
Accounts receivable at CEQP and CMLP	$	7.3	$	2.5
Accounts payable at CEQP(1)	$	13.1	$	7.5
Accounts payable at CMLP	$	13.1	$	5.0

(1)In conjunction with the Crestwood Holdings Transactions discussed in Note 1, CEQP eliminated approximately $2.4 million of accounts payable to Crestwood Holdings which is reflected as an increase to CEQP’s common unitholders’ partners’ capital in its consolidated statement of partners’ capital during the first quarter of 2021.

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Organization and Business Description (Details) shares in Millions, $ in Millions	1 Months Ended	9 Months Ended
	Mar. 31, 2021 USD ($) shares	Sep. 30, 2021 segment
Partnership Organization And Basis Of Presentation [Line Items]
Number of Operating Segments | segment		3
Cash Paid to Repurchase Common Stock | $	$ 268
Common Units
Partnership Organization And Basis Of Presentation [Line Items]
Stock exchanged (in shares)	11.5
Subordinated Units
Partnership Organization And Basis Of Presentation [Line Items]
Stock exchanged (in shares)	0.4
Crestwood Midstream Partners LP | Crestwood Gas Services GP, LLC
Partnership Organization And Basis Of Presentation [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest		0.10%
Crestwood Midstream Partners LP | Crestwood Equity Partners LP
Partnership Organization And Basis Of Presentation [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest		99.90%
Crestwood Holdings LP | Crestwood Equity Partners LP
Partnership Organization And Basis Of Presentation [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest	99.00%
Crestwood Holdings LP | Crestwood Gas Services Holdings LLC
Partnership Organization And Basis Of Presentation [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest		1.00%

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Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Summary Of Significant Accounting Policies [Line Items]
Goodwill impairment		$ 0.0	$ 0.0	$ 0.0	$ 80.3
Loss on long-lived assets, net		$ 18.5	$ 21.3	19.6	26.1
Powder River Basin [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill impairment					$ 80.3
Marcellus
Summary Of Significant Accounting Policies [Line Items]
Loss on long-lived assets, net				$ 19.0
Fayetteville
Summary Of Significant Accounting Policies [Line Items]
Gain (Loss) on Disposition of Assets	$ 19.9

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Acquisitions (Details) - Plains All American Pipeline, L.P. $ in Millions	1 Months Ended
	Apr. 30, 2020 USD ($) Terminals MMBbls
Business Acquisition [Line Items]
Consideration transferred | $	$ 162
NGL Storage Capacity | MMBbls	7
Liquid Petroleum Gas Terminals | Terminals	7

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Certain Balance Sheet Information (Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Accrued Expenses and Other Liabilities [Line Items]
Accrued expenses	$ 51.1	$ 48.3
Accrued property taxes	6.9	8.4
Income tax payable	0.3	0.2
Interest payable	36.7	24.9
Accrued additions to property, plant and equipment	18.1	12.3
Operating leases	14.5	14.7
Finance leases	2.1	2.9
Deferred revenue	10.8	10.3
Total accrued expenses and other liabilities	140.5	122.0
Contract liabilities	183.4	172.2
Operating leases	22.0	28.5
Asset retirement obligations	35.6	34.1
Other long-term liabilities	259.8	253.3
Other
Accrued Expenses and Other Liabilities [Line Items]
Other long-term liabilities	18.8	18.5
Crestwood Midstream Partners LP
Accrued Expenses and Other Liabilities [Line Items]
Accrued expenses	49.9	46.4
Accrued property taxes	6.9	8.4
Income tax payable	0.3	0.2
Interest payable	36.7	24.9
Accrued additions to property, plant and equipment	18.1	12.3
Operating leases	14.5	14.7
Finance leases	2.1	2.9
Deferred revenue	10.8	10.3
Total accrued expenses and other liabilities	139.3	120.1
Contract liabilities	183.4	172.2
Operating leases	22.0	28.5
Asset retirement obligations	35.6	34.1
Other long-term liabilities	256.6	251.8
Crestwood Midstream Partners LP | Other
Accrued Expenses and Other Liabilities [Line Items]
Other long-term liabilities	$ 15.6	$ 17.0

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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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Investment	$ 168.0		$ 168.0		$ 943.7
Earnings (loss) from unconsolidated affiliates, net	4.9	$ 10.5	(125.9)	$ 24.4
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Investment	15.2		15.2		792.5
Earnings (loss) from unconsolidated affiliates, net	0.9	9.9	(139.4)	28.3
Difference between carrying amount and underlying equity	51.3		51.3
Stagecoach Gas Services LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from unconsolidated affiliates, net			155.4
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investment	38.4		38.4		35.5
Earnings (loss) from unconsolidated affiliates, net	(0.1)	0.1	9.1	0.2
Difference between carrying amount and underlying equity	21.8		21.8
Amortization	0.3	0.3	0.9	0.9
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Investment	3.5		3.5		3.6
Earnings (loss) from unconsolidated affiliates, net	(0.1)	0.0	0.0	(4.4)
Difference between carrying amount and underlying equity		5.5		5.5
Powder River Basin Industrial Complex, LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from unconsolidated affiliates, net				4.5
Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investment	110.9		110.9		$ 112.1
Earnings (loss) from unconsolidated affiliates, net	4.2	$ 0.5	4.4	$ 0.3
Difference between carrying amount and underlying equity	$ 7.5		$ 7.5

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Investments in Unconsolidated Affiliates (Summarized Financial Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Equity Method Investments [Line Items]
Operating Revenues	$ 1,226.3	$ 519.2	$ 3,188.6	$ 1,599.8
Operating Expenses	140.6	132.7	359.8	448.5
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (39.6)	$ 4.6	(116.0)	(43.1)
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Operating Revenues			313.8	206.5
Operating Expenses			665.1	171.9
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(350.6)	35.5
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Operating Revenues			81.4	115.3
Operating Expenses			456.9	58.9
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			(375.5)	56.5
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Other Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Operating Revenues			232.4	91.2
Operating Expenses			208.2	113.0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			$ 24.9	$ (21.0)

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Investments in Unconsolidated Affiliates (Distributions and Contributions) (Details) - USD ($) $ in Millions	1 Months Ended		9 Months Ended
	Oct. 31, 2021	Jul. 31, 2021	Sep. 30, 2021	Sep. 30, 2020
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			$ 663.0	$ 57.6
Payments to acquire equity method investments			10.2	6.0
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments		$ 613.9	640.9	44.5
Payments to acquire equity method investments			0.0	0.0
Transaction costs		3.0
Payment for contingent consideration		$ 40.0	57.0
Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			8.9	8.5
Payments to acquire equity method investments			3.3	0.0
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			13.1	4.4
Payments to acquire equity method investments			6.9	6.0
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments			0.1	0.2
Payments to acquire equity method investments			$ 0.0	$ 0.0
Subsequent Event | Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments	$ 7.4
Subsequent Event | Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investments	$ 2.4

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Investments in Unconsolidated Affiliates (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			9 Months Ended
	Jul. 31, 2021	Dec. 31, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from unconsolidated affiliates, net			$ 4.9	$ 10.5	$ (125.9)	$ 24.4
Interest paid					8.6
Stagecoach Gas Services LLC
Schedule of Equity Method Investments [Line Items]
Proceeds from sale	$ 1,195.0
Difference between carrying amount and underlying equity			51.3		51.3
Earnings (loss) from unconsolidated affiliates, net			0.9	9.9	(139.4)	28.3
Transaction costs	3.0
Payment for contingent consideration	$ 40.0				57.0
Interest paid					2.1
Stagecoach Gas Services LLC | Forecast
Schedule of Equity Method Investments [Line Items]
Proceeds from sale		$ 30.0
Stagecoach Gas Services LLC | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from unconsolidated affiliates, net					155.4
Crestwood Permian Basin Holdings LLC
Schedule of Equity Method Investments [Line Items]
Difference between carrying amount and underlying equity			7.5		7.5
Earnings (loss) from unconsolidated affiliates, net			4.2	0.5	4.4	0.3
Guarantee payment			$ 10.0		$ 10.0
Ownership percentage			50.00%		50.00%
Crestwood Midstream Partners LP
Schedule of Equity Method Investments [Line Items]
Earnings (loss) from unconsolidated affiliates, net			$ 4.9	$ 10.5	$ (125.9)	$ 24.4

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Risk Management (Risk Management Activities) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Product revenues	$ 129.4	$ 32.4	$ 296.9	$ 125.4
Commodity contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivative instruments not designated as hedging	$ (53.4)	$ (1.8)	$ (94.8)	$ 13.4

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Risk Management (Notional Amounts and Terms of Company's Derivative Financial Instruments) (Details) bcf in Millions, MMBbls in Millions	Sep. 30, 2021 bcf MMBbls	Dec. 31, 2020 MMBbls bcf
Propane, ethane, butane, heating oil and crude oil (MMBbls) | Fixed Price Payor
Derivative [Line Items]
Derivative, notional amount | MMBbls	73.9	72.7
Propane, ethane, butane, heating oil and crude oil (MMBbls) | Fixed Price Receiver
Derivative [Line Items]
Derivative, notional amount | MMBbls	78.4	76.5
Natural gas (Bcf) | Fixed Price Payor
Derivative [Line Items]
Derivative, notional amount | bcf	32.1	22.6
Natural gas (Bcf) | Fixed Price Receiver
Derivative [Line Items]
Derivative, notional amount | bcf	42.8	28.6

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Risk Management (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Collateral posted for commodity derivative instruments	$ 14.3	$ 12.4
Commodity contract
Derivative [Line Items]
Collateral posted for commodity derivative instruments	1.1	0.1
Commodity contract with credit contingent features
Derivative [Line Items]
Aggregate fair value of commodity derivative instruments	157.6	38.5
Variation Margin-Related Net Derivative Asset Position
Derivative [Line Items]
Derivative Asset	199.6	35.9
Variation Margin-Related Cash Collateral Received
Derivative [Line Items]
NYMEX margin deposits	$ 163.9	$ 18.3

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Risk Management (Narrative) (Details) - Price Risk Contracts Member - Maximum	9 Months Ended
	Sep. 30, 2021
Derivative [Line Items]
Remaining maturity	36 months
Percent of contracts expiring in the next twelve months	86.00%

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Fair Value Measurements (Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	$ 1,543.2	$ 500.7
SPH units	2.2	2.1
Assets, Fair Value Disclosure, Excluding Netting Adjustments	1,545.4	502.8
Netting agreements	(1,339.6)	(455.0)
Assets, Collateral/Margin Received or Paid	(164.5)	(18.5)
Assets from price risk management, total	39.1	27.2
Total assets at fair value	41.3	29.3
Liabilities from price risk management	1,603.2	519.1
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	1,603.2	519.1
Netting agreements	(1,339.6)	(455.0)
Liabilities, Collateral/Margin Received or Paid	13.7	12.2
Liabilities from price risk management, total	277.3	76.3
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	74.2	20.2
SPH units	2.2	2.1
Assets, Fair Value Disclosure, Excluding Netting Adjustments	76.4	22.3
Liabilities from price risk management	55.8	25.1
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	55.8	25.1
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	1,469.0	480.5
SPH units	0.0	0.0
Assets, Fair Value Disclosure, Excluding Netting Adjustments	1,469.0	480.5
Liabilities from price risk management	1,547.4	494.0
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	1,547.4	494.0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets from price risk management	0.0	0.0
SPH units	0.0	0.0
Assets, Fair Value Disclosure, Excluding Netting Adjustments	0.0	0.0
Liabilities from price risk management	0.0	0.0
Liabilities, Fair Value Disclosure, Excluding Netting Adjustments	$ 0.0	$ 0.0

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Fair Value Measurements (Schedule of Carrying Values and Estimated Fair Values of Senior Notes) (Details) - Crestwood Midstream Partners LP - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
2023 Senior Notes
Debt Instrument [Line Items]
Carrying Amount	$ 0.0	$ 683.8
Fair Value	0.0	691.5
2025 Senior Notes
Debt Instrument [Line Items]
Carrying Amount	496.3	495.5
Fair Value	511.9	509.9
2027 Senior Notes
Debt Instrument [Line Items]
Carrying Amount	594.0	593.2
Fair Value	618.4	594.1
Senior Notes, 2029
Debt Instrument [Line Items]
Carrying Amount	690.5	0.0
Fair Value	$ 734.0	$ 0.0

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Long-Term Debt (Components Of Long-Term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Less: deferred financing costs, net	$ 25.6	$ 22.6
Total debt	2,025.1	2,484.0
Less: current portion	0.2	0.2
Total long-term debt, less current portion	2,024.9	2,483.8
Senior Notes | 2023 Senior Notes
Debt Instrument [Line Items]
Senior notes	0.0	687.2
Senior Notes | 2025 Senior Notes
Debt Instrument [Line Items]
Senior notes	500.0	500.0
Senior Notes | 2027 Senior Notes
Debt Instrument [Line Items]
Senior notes	600.0	600.0
Senior Notes | Senior Notes, 2029
Debt Instrument [Line Items]
Senior notes	700.0	0.0
Other(1)
Debt Instrument [Line Items]
Other(1)	0.2	0.4
Revolving Credit Facility | Crestwood Midstream Revolver
Debt Instrument [Line Items]
Credit Facility	$ 250.5	$ 719.0

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Long-Term Debt (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jan. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Senior Secured Leverage Ratio, maximum	3.75		3.75
Senior Secured Leverage Ratio	0.42		0.42
Extinguishment of Debt, Amount			$ 687,200,000
Loss on modification/extinguishment of debt	$ 0	$ 0	6,700,000	$ 0
Interest paid			8,600,000
Crestwood Midstream Partners LP
Debt Instrument [Line Items]
Loss on modification/extinguishment of debt	0	$ 0	6,700,000	$ 0
2027 Senior Notes | Crestwood Midstream Partners LP
Debt Instrument [Line Items]
Senior notes	594,000,000.0		594,000,000.0			$ 593,200,000
2025 Senior Notes | Crestwood Midstream Partners LP
Debt Instrument [Line Items]
Senior notes	496,300,000		$ 496,300,000			495,500,000
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	985,300,000		$ 985,300,000
Letters of credit outstanding	$ 14,200,000		$ 14,200,000			$ 23,900,000
Debt, Weighted Average Interest Rate	2.41%		2.41%			2.45%
Interest Coverage Ratio Minimum			2.50
Total Funded Debt to Consolidated Ebitda			3.45
Consolidated Ebitda To Consolidated Interest Expense			4.98
Crestwood Midstream Revolver | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	2.34%		2.34%			2.40%
Crestwood Midstream Revolver | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.50%		4.50%			4.50%
2023 Senior Notes | Crestwood Midstream Partners LP
Debt Instrument [Line Items]
Senior notes	$ 0		$ 0			$ 683,800,000
Senior Notes | 2027 Senior Notes
Debt Instrument [Line Items]
Senior notes	600,000,000.0		600,000,000.0			600,000,000.0
Senior Notes | 2025 Senior Notes
Debt Instrument [Line Items]
Senior notes	500,000,000.0		500,000,000.0			500,000,000.0
Senior Notes | 2023 Senior Notes
Debt Instrument [Line Items]
Senior notes	0		0			$ 687,200,000
Senior Notes | Senior Notes, due 2029
Debt Instrument [Line Items]
Senior notes					$ 700,000,000
Debt Instrument, Interest Rate, Stated Percentage					6.00%
Proceeds from Issuance of Debt			691,000,000
Revolving Loan Facility | Crestwood Midstream Partners LP
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,250,000,000		$ 1,250,000,000
Debt Instrument, Term			5 years

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Commitments and Contingencies (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Damages paid	$ 19.5
Damages		$ 36.0
Accrued amounts for outstanding legal matters	16.6	16.6	$ 10.4
Crestwood Midstream Partners LP
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Self-insurance reserves	$ 5.8	$ 5.8	$ 6.7

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Commitments and Contingencies (Environmental Compliance) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Site Contingency [Line Items]
Penalties	$ 0.1
Fort Berthold Indian Reservation
Site Contingency [Line Items]
Accrual of environmental loss contingencies	1.2	$ 1.3
Maximum | Fort Berthold Indian Reservation
Site Contingency [Line Items]
Potential liability for environmental exposures	1.9
Minimum | Fort Berthold Indian Reservation
Site Contingency [Line Items]
Potential liability for environmental exposures	$ 1.2

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Commitments and Contingencies (Self Insurance) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Crestwood Equity Partners LP
Other Commitments [Line Items]
Self-insurance reserves	$ 6.7	$ 7.7
Self-insurance reserves expected to be paid	4.8
Crestwood Midstream Partners LP
Other Commitments [Line Items]
Self-insurance reserves	5.8	$ 6.7
Self-insurance reserves expected to be paid	$ 4.1

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Leases (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets, net	$ 31.1		$ 31.1		$ 36.8
Operating leases	14.5		14.5		14.7
Operating leases	22.0		22.0		28.5
Total operating lease liabilities	36.5		36.5		43.2
Finance Lease, Right-of-Use Asset, before Accumulated Amortization	12.1		12.1		13.3
Property, plant and equipment	3,788.5		3,788.5		3,759.6
Finance Lease, Right-of-Use Asset, Accumulated Amortization	8.5		8.5		7.9
Less: accumulated depreciation	962.7		962.7		842.5
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	3.6		3.6		5.4
Property, plant and equipment, net	2,825.8		2,825.8		2,917.1
Finance leases	2.1		2.1		2.9
Finance Lease, Liability, Noncurrent	1.2		1.2		1.9
Finance Lease, Liability	3.3		3.3		$ 4.8
Operating lease expense	3.7	$ 5.8	12.8	$ 20.4
Finance lease expense	$ 0.8	$ 0.9	$ 2.6	$ 3.1
Operating lease, liability, current, extensible enumeration	Accrued expenses and other liabilities		Accrued expenses and other liabilities		Accrued expenses and other liabilities
Finance lease, liability, noncurrent, extensible enumeration	Other long-term liabilities		Other long-term liabilities		Other long-term liabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities		Accrued expenses and other liabilities		Accrued expenses and other liabilities
Operating lease, liability, noncurrent, extensible enumeration	Other long-term liabilities		Other long-term liabilities		Other long-term liabilities

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Partners' Capital (Schedule of Partners' Capital Account, Distributions) (Details) - USD ($) $ / shares in Units, $ in Millions													9 Months Ended
	Aug. 13, 2021	Aug. 06, 2021	May 14, 2021	May 07, 2021	Feb. 12, 2021	Feb. 05, 2021	Aug. 14, 2020	Aug. 07, 2020	May 15, 2020	May 08, 2020	Feb. 14, 2020	Feb. 07, 2020	Sep. 30, 2021	Sep. 30, 2020
Distribution Made to Limited Partner [Line Items]
Distribution Made to Limited Partner, Date of Record		Aug. 06, 2021		May 07, 2021		Feb. 05, 2021		Aug. 07, 2020		May 08, 2020		Feb. 07, 2020
Distribution Made to Limited Partner, Distribution Date	Aug. 13, 2021		May 14, 2021		Feb. 12, 2021		Aug. 14, 2020		May 15, 2020		Feb. 14, 2020
Distribution Made to Member or Limited Partner, Distributions Paid, Per Unit	$ 0.625		$ 0.625		$ 0.625		$ 0.625		$ 0.625		$ 0.625
Distribution Made to Limited Partner, Cash Distributions Paid	$ 39.3		$ 39.3		$ 46.4		$ 45.7		$ 45.7		$ 45.3		$ 125.0	$ 136.7

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Partners' Capital (Components of Net Income (Loss) Attributable to Non-Controlling Interests) (Details) $ in Millions	1 Months Ended
	Oct. 31, 2021 USD ($)
Crestwood Niobrara LLC | Subsequent Event
Distribution Made to Limited Partner [Line Items]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	$ (10.3)

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Partners' Capital (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions																1 Months Ended		3 Months Ended	9 Months Ended
	Nov. 12, 2021	Nov. 05, 2021	Oct. 14, 2021	Aug. 13, 2021	Aug. 06, 2021	May 14, 2021	May 07, 2021	Feb. 12, 2021	Feb. 05, 2021	Aug. 14, 2020	Aug. 07, 2020	May 15, 2020	May 08, 2020	Feb. 14, 2020	Feb. 07, 2020	Mar. 31, 2021	Feb. 28, 2021	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021
Distribution Made to Limited Partner [Line Items]
Distribution Made to Limited Partner, Distribution Date				Aug. 13, 2021		May 14, 2021		Feb. 12, 2021		Aug. 14, 2020		May 15, 2020		Feb. 14, 2020
Distribution Made to Limited Partner, Date of Record					Aug. 06, 2021		May 07, 2021		Feb. 05, 2021		Aug. 07, 2020		May 08, 2020		Feb. 07, 2020
Distributions to preferred unitholders																			$ 45.0	$ 45.0
Incentive Distribution, Distribution																			125.0	136.7
Distributions to non-controlling partner																			29.9	27.8
Distribution Made to Limited Partner, Cash Distributions Paid				$ 39.3		$ 39.3		$ 46.4		$ 45.7		$ 45.7		$ 45.3					125.0	136.7
Cash Paid to Repurchase Common Stock																$ 268.0
Common Units
Distribution Made to Limited Partner [Line Items]
Stock exchanged (in shares)																11,500,000
Subordinated Units
Distribution Made to Limited Partner [Line Items]
Stock exchanged (in shares)																400,000
Crestwood Midstream Partners LP
Distribution Made to Limited Partner [Line Items]
Incentive Distribution, Distribution																			451.3	180.9
Distributions to non-controlling partner																			29.9	27.8
Distribution Made to General Partner, Cash Distributions Paid																			451.3	$ 180.9
Common unit
Distribution Made to Limited Partner [Line Items]
Transaction Costs																					$ 7.6
Performance Shares
Distribution Made to Limited Partner [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period																	50,000
Share-based Payment Arrangement, Noncash Expense																		$ 0.1	$ 0.2
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																			3 years
Subsequent Event
Distribution Made to Limited Partner [Line Items]
Distribution Made to Limited Partner, Distribution Date	Nov. 12, 2021
Distribution Made to Limited Partner, Date of Record		Nov. 05, 2021
Distributions to preferred unitholders			$ 15.0
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																		$ 0.9	$ 0.9

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Partners' Capital Rollforward of non-controlling interest (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Oct. 31, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Increase (Decrease) in Temporary Equity [Roll Forward]
Temporary Equity, Net Income		$ 30.7	$ 30.4
Interest of non-controlling partner in subsidiary		434.5	431.6	$ 432.7	$ 426.2
Net proceeds from issuance of non-controlling interest		1.0	2.8
Subsequent Event | Crestwood Niobrara LLC
Increase (Decrease) in Temporary Equity [Roll Forward]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	$ (10.3)
Non-Controlling Partners
Increase (Decrease) in Temporary Equity [Roll Forward]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(29.9)	(27.8)
Net proceeds from issuance of non-controlling interest		$ 1.0	$ 2.8

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Earnings Per Limited Partner Unit (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
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
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	0.2	0.1	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	0.0	0.4	0.1	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	3.9	8.7	3.9	8.7

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Segments (Reconciliation of Net Income (Loss) to EBITDA) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)
Segment Reporting, Other Significant Reconciling Item [Line Items]
Number of Operating Segments | segment			3
Net income (loss)	$ (39.6)	$ 4.6	$ (116.0)	$ (43.1)
Interest and debt expense, net	30.9	33.7	102.0	100.3
Provision (benefit) for income taxes	0.1	0.0	0.1	(0.1)
Depreciation, amortization and accretion	64.6	60.8	182.6	177.9
EBITDA	56.0	99.1	175.4	235.0
Loss on modification/extinguishment of debt	0.0	0.0	6.7	0.0
Crestwood Midstream Partners LP
Segment Reporting, Other Significant Reconciling Item [Line Items]
Net income (loss)	(41.8)	2.3	(120.7)	(50.1)
Interest and debt expense, net	30.9	33.7	102.0	100.3
Provision (benefit) for income taxes	0.1	0.0	0.1	(0.2)
Depreciation, amortization and accretion	68.2	64.2	193.2	188.4
EBITDA	57.4	100.2	181.3	238.4
Loss on modification/extinguishment of debt	$ 0.0	$ 0.0	$ 6.7	$ 0.0

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Segments (Summary Of Segment Information) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Net income (loss)	$ (39.6)	$ 4.6	$ (116.0)	$ (43.1)
Number of Operating Segments | segment			3
Depreciation, amortization and accretion	64.6	60.8	$ 182.6	177.9
Segment Reporting Information, Additional Information [Abstract]
Revenues	1,226.3	519.2	3,188.6	1,599.8
Costs of product/services sold	1,099.3	358.7	2,710.3	1,118.8
Operations and maintenance	31.6	31.0	90.2	100.2
General and administrative	25.9	19.6	67.4	64.0
Gain (loss) on long-lived assets	(18.5)	(21.3)	(19.6)	(26.1)
Goodwill impairment	0.0	0.0	0.0	(80.3)
Earnings (loss) from unconsolidated affiliates, net	4.9	10.5	(125.9)	24.4
Other income, net	0.1	0.0	0.2	0.2
EBITDA	56.0	99.1	175.4	235.0
Assets	4,574.5		4,574.5		$ 5,243.7
Corporate, Non-Segment
Segment Reporting Information, Additional Information [Abstract]
Assets	20.7		20.7		29.5
Intersegment Eliminations
Segment Reporting Information, Additional Information [Abstract]
Revenues	(127.9)	(46.8)	(322.9)	(106.1)
Gathering and Processing Segment | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Revenues	296.8	190.1	814.0	573.8
Assets	3,357.4		3,357.4		3,464.6
Storage and Transportation | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Revenues	4.3	5.4	13.8	17.0
Assets	163.6		163.6		944.6
Marketing Supply and Logistics | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Revenues	1,053.1	370.5	2,683.7	1,115.1
Marketing Supply and Logistics | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Assets	1,032.8		1,032.8		805.0
Crestwood Midstream Partners LP
Net income (loss)	(41.8)	2.3	(120.7)	(50.1)
Depreciation, amortization and accretion	68.2	64.2	193.2	188.4
Segment Reporting Information, Additional Information [Abstract]
Revenues	1,226.3	519.2	3,188.6	1,599.8
Costs of product/services sold	1,099.3	358.7	2,710.3	1,118.8
Operations and maintenance	31.6	31.0	90.2	100.2
General and administrative	24.4	18.5	61.3	60.4
Gain (loss) on long-lived assets	(18.5)	(21.3)	(19.6)	(26.1)
Goodwill impairment	0.0	0.0	0.0	(80.3)
Earnings (loss) from unconsolidated affiliates, net	4.9	10.5	(125.9)	24.4
EBITDA	57.4	100.2	181.3	238.4
Assets	4,705.6		4,705.6		5,385.5
Crestwood Midstream Partners LP | Corporate, Non-Segment
Segment Reporting Information, Additional Information [Abstract]
Revenues	0.0	0.0	0.0	0.0
Costs of product/services sold	0.0	0.0	0.0	0.0
Operations and maintenance	0.0	0.0	0.0	0.0
General and administrative	24.4	18.5	61.3	60.4
Gain (loss) on long-lived assets	0.0	0.2	0.0	0.2
Goodwill impairment				0.0
Earnings (loss) from unconsolidated affiliates, net	0.0	0.0	0.0	0.0
EBITDA	(24.4)	(18.3)	(61.3)	(60.2)
Assets	17.3		17.3		26.2
Crestwood Midstream Partners LP | Corporate and Eliminations [Member]
Segment Reporting Information, Additional Information [Abstract]
Revenues	0.0	0.0	0.0	0.0
Crestwood Midstream Partners LP | Gathering and Processing Segment | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Revenues	171.2	145.2	498.9	474.6
Costs of product/services sold	150.1	63.2	387.2	192.8
Operations and maintenance	19.5	19.4	55.6	65.7
General and administrative	0.0	0.0	0.0	0.0
Gain (loss) on long-lived assets	(18.5)	(19.1)	(19.7)	(23.7)
Goodwill impairment				(80.3)
Earnings (loss) from unconsolidated affiliates, net	4.2	0.5	4.4	0.3
EBITDA	112.9	88.9	355.9	211.6
Assets	3,491.9		3,491.9		3,609.7
Crestwood Midstream Partners LP | Gathering and Processing Segment | Intersegment Eliminations
Segment Reporting Information, Additional Information [Abstract]
Revenues	125.6	44.9	315.1	99.2
Crestwood Midstream Partners LP | Storage and Transportation | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Revenues	2.0	3.5	6.0	10.1
Costs of product/services sold	(0.2)	0.0	(0.2)	0.3
Operations and maintenance	1.5	0.7	3.1	2.8
General and administrative	0.0	0.0	0.0	0.0
Gain (loss) on long-lived assets	0.0	0.0	0.0	0.0
Goodwill impairment				0.0
Earnings (loss) from unconsolidated affiliates, net	0.7	10.0	(130.3)	24.1
EBITDA	3.7	14.7	(119.4)	38.0
Assets	163.6		163.6		944.6
Crestwood Midstream Partners LP | Storage and Transportation | Intersegment Eliminations
Segment Reporting Information, Additional Information [Abstract]
Revenues	2.3	1.9	7.8	6.9
Crestwood Midstream Partners LP | Marketing Supply and Logistics | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Revenues	1,053.1	370.5	2,683.7	1,115.1
Costs of product/services sold	949.4	295.5	2,323.3	925.7
Operations and maintenance	10.6	10.9	31.5	31.7
General and administrative	0.0	0.0	0.0	0.0
Gain (loss) on long-lived assets	0.0	(2.4)	0.1	(2.6)
Earnings (loss) from unconsolidated affiliates, net	0.0	0.0	0.0	0.0
EBITDA	(34.8)	14.9	6.1	49.0
Assets	1,032.8		1,032.8		$ 805.0
Crestwood Midstream Partners LP | Marketing Supply and Logistics | Intersegment Eliminations
Segment Reporting Information, Additional Information [Abstract]
Revenues	(127.9)	(46.8)	(322.9)	(106.1)
Crestwood Midstream Partners LP | Marketing Supply and Logistics | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
Goodwill impairment				0.0
Crestwood Equity Partners LP
Segment Reporting Information, Additional Information [Abstract]
General and administrative	1.5	1.1	6.1	3.6
Other income, net	0.1		0.2	0.2
EBITDA	56.0	99.1	175.4	235.0
Crestwood Equity Partners LP | Corporate, Non-Segment
Segment Reporting Information, Additional Information [Abstract]
General and administrative	1.5	1.1	6.1	3.6
Other income, net	0.1		0.2	0.2
EBITDA	(25.8)	(19.4)	(67.2)	(63.6)
Crestwood Equity Partners LP | Gathering and Processing Segment | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
General and administrative	0.0	0.0	0.0	0.0
Other income, net	0.0		0.0	0.0
EBITDA	112.9	88.9	355.9	211.6
Crestwood Equity Partners LP | Storage And Transportation Operations | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
General and administrative	0.0	0.0	0.0	0.0
Other income, net	0.0		0.0	0.0
EBITDA	3.7	14.7	(119.4)	38.0
Crestwood Equity Partners LP | Marketing Supply and Logistics | Operating Segments
Segment Reporting Information, Additional Information [Abstract]
General and administrative	0.0	0.0	0.0	0.0
Other income, net	0.0		0.0	0.0
EBITDA	$ (34.8)	$ 14.9	$ 6.1	$ 49.0

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Segments (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Interest, taxes, depreciation and amortization included in earnings from equity method investments | $	$ 4.9	$ 9.9	$ 182.4	$ 33.2
Number of Operating Segments | segment			3

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Revenues (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Revenue Recognition [Abstract]
ASC 606 accounts receivable	$ 350.0	$ 219.9

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Revenues (Contract Assets and Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Revenue Recognition [Abstract]
Contract Assets (Non-current)	$ 1.4	$ 1.4	$ 1.0
Contract Liabilities (Current)	10.8	10.8	10.3
Contract liabilities	183.4	183.4	$ 172.2
Contract with Customer, Liability, Revenue Recognized	$ 3.4	$ 9.8

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Revenues (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 1,226.3	$ 519.2	$ 3,188.6	$ 1,599.8
Natural Gas Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	35.3	30.3	100.0	107.3
Crude Oil Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	17.1	22.5	56.2	66.9
Water Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	24.8	25.1	69.5	66.4
Natural Gas Processing
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7.2	6.1	21.5	23.4
Natural Gas Compression
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3.7	6.0	12.1	18.0
Crude Oil Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.1	0.6	0.4	2.0
NGL Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.6	3.4	8.7	8.6
Crude Oil Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.6	1.1	2.0	3.1
Crude Oil Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.7	1.2	1.8	6.6
NGL Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4.1	3.1	12.5	7.4
Crude Oil Rail Loading
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.2	1.8	3.4	5.5
Natural Gas Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	84.7	22.4	225.2	56.6
Crude Oil Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	411.6	216.7	1,161.5	701.4
NGL Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	501.6	145.6	1,212.7	398.6
Other revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.5	0.4	1.4	1.3
NGL Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.1	0.2
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenues	(127.9)	(46.8)	(322.9)	(106.1)
Intersegment Eliminations | Natural Gas Gathering
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	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	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	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	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	0.0	0.0
Intersegment Eliminations | Crude Oil Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.4)	(0.3)	(1.8)	(1.5)
Intersegment Eliminations | NGL Storage
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Intersegment Eliminations | Crude Oil Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.9)	(0.6)	(2.5)	(1.5)
Intersegment Eliminations | Crude Oil Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.1)	0.0	(0.1)	0.0
Intersegment Eliminations | NGL Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Intersegment Eliminations | Crude Oil Rail Loading
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(1.0)	(0.9)	(3.4)	(3.5)
Intersegment Eliminations | Natural Gas Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(42.7)	(12.9)	(111.7)	(31.4)
Intersegment Eliminations | Crude Oil Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(25.1)	(15.6)	(62.5)	(39.0)
Intersegment Eliminations | NGL Product Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(57.6)	(16.4)	(140.5)	(28.6)
Intersegment Eliminations | Other revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.1)	(0.1)	(0.4)	(0.6)
Intersegment Eliminations | NGL Pipeline
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.0	0.0
Operating Segments | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenues	296.8	190.1	814.0	573.8
Operating Segments | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenues	1,053.1	370.5	2,683.7	1,115.1
Operating Segments | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenues	4.3	5.4	13.8	17.0
Operating Segments | Natural Gas Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	35.3	30.3	100.0	107.3
Operating Segments | Natural Gas Gathering | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Natural Gas Gathering | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Crude Oil Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	17.1	22.5	56.2	66.9
Operating Segments | Crude Oil Gathering | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Crude Oil Gathering | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Water Gathering | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	24.8	25.1	69.5	66.4
Operating Segments | Water Gathering | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Water Gathering | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Natural Gas Processing | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7.2	6.1	21.5	23.4
Operating Segments | Natural Gas Processing | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Natural Gas Processing | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Natural Gas Compression | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3.7	6.0	12.1	18.0
Operating Segments | Natural Gas Compression | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Natural Gas Compression | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Crude Oil Storage | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.1	0.1	0.3	1.0
Operating Segments | Crude Oil Storage | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Crude Oil Storage | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.4	0.8	1.9	2.5
Operating Segments | NGL Storage | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | NGL Storage | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.6	3.4	8.7	8.6
Operating Segments | NGL Storage | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Crude Oil Pipeline | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Crude Oil Pipeline | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Crude Oil Pipeline | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1.5	1.7	4.5	4.6
Operating Segments | Crude Oil Transportation | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.8	1.2	1.9	4.7
Operating Segments | Crude Oil Transportation | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	1.9
Operating Segments | Crude Oil Transportation | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | NGL Transportation | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | NGL Transportation | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4.1	3.1	12.5	7.4
Operating Segments | NGL Transportation | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | 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	0.0	0.0
Operating Segments | 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	0.0	0.0
Operating Segments | Crude Oil Rail Loading | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2.2	2.7	6.8	9.0
Operating Segments | Natural Gas Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	42.9	13.0	112.5	31.9
Operating Segments | Natural Gas Product Sales | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	84.5	22.3	224.4	56.1
Operating Segments | Natural Gas Product Sales | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Crude Oil Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	105.4	69.4	297.1	225.3
Operating Segments | Crude Oil Product Sales | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	331.3	162.9	926.9	515.1
Operating Segments | Crude Oil Product Sales | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | NGL Product Sales | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	59.1	16.4	142.3	28.9
Operating Segments | NGL Product Sales | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	500.1	145.6	1,210.9	398.3
Operating Segments | NGL Product Sales | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Other revenue | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.0	0.0	0.0	0.0
Operating Segments | Other revenue | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.4	0.3	1.2	1.0
Operating Segments | Other revenue | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.2	0.2	0.6	0.9
Operating Segments | NGL Pipeline | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.0	0.0
Operating Segments | NGL Pipeline | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.1	0.2
Operating Segments | NGL Pipeline | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax			0.0	0.0
Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,095.8	486.3	2,889.0	1,473.3
Revenue from Contract with Customer | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(127.9)	(46.8)	(322.9)	(106.1)
Revenue from Contract with Customer | Operating Segments | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	296.4	190.1	813.4	573.8
Revenue from Contract with Customer | Operating Segments | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	923.0	337.6	2,384.7	988.6
Revenue from Contract with Customer | Operating Segments | Storage and Transportation
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4.3	5.4	13.8	17.0
Product and Service, Other
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	130.5	32.9	299.6	126.5
Product and Service, Other | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	0.0	0.0	0.0	0.0
Product and Service, Other | Operating Segments | Gathering and Processing Operations
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	0.4	0.0	0.6	0.0
Product and Service, Other | Operating Segments | Marketing Supply and Logistics
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	130.1	32.9	299.0	126.5
Product and Service, Other | Operating Segments | Storage and Transportation
Disaggregation of Revenue [Line Items]
Non-Topic 606 revenues	$ 0.0	$ 0.0	$ 0.0	$ 0.0

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Revenues (Remaining Performance Obligations) (Details) $ in Millions	Sep. 30, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 183.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
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, Amount	$ 23.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
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, Amount	$ 75.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
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, Amount	$ 52.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
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, Amount	$ 31.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
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]: 2037-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	16 years

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Related Party Transactions (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Purchases of property, plant and equipment				$ 55,800,000	$ 158,800,000
Costs of product/services sold at CEQP and CMLP(2)	$ 34,800,000		$ 6,100,000	101,300,000	12,900,000
Operations and maintenance expenses charged by CEQP and CMLP	5,100,000		5,000,000.0	16,800,000	16,700,000
Related Party Transaction, Due from (to) Related Party [Abstract]
Related party receivables	7,300,000			7,300,000		$ 2,500,000
Related party payables	13,100,000			13,100,000		7,500,000
Noncash Distribution to Parent		$ 2,400,000
Applied Consultants, Inc.
Related Party Transaction [Line Items]
Purchases of property, plant and equipment				600,000	3,200,000
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP(2)	30,400,000		5,700,000	75,500,000	12,100,000
Tres Palacios Holdings LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP(2)	200,000		300,000	11,300,000	400,000
Ascent Resources - Utica, LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP(2)	4,200,000		100,000	14,500,000	400,000
Affiliated Entity
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	7,100,000		10,900,000	25,200,000	25,900,000
Costs of product/services sold at CEQP and CMLP(2)	34,800,000		6,100,000	101,300,000	12,900,000
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	11,900,000		7,400,000	24,400,000	25,400,000
Crestwood Equity Partners LP | Affiliated Entity
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party			900,000	200,000	1,300,000
Related Party Transaction Selling General And Administrative Expenses To (From) Transactions With Related Party	0		1,200,000	4,800,000	12,500,000
Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Purchases of property, plant and equipment				55,800,000	158,800,000
Costs of product/services sold at CEQP and CMLP(2)	34,800,000		6,100,000	101,300,000	12,900,000
Related Party Transaction, Due from (to) Related Party [Abstract]
Related party payables	13,100,000			13,100,000		$ 5,000,000.0
Crestwood Midstream Partners LP | Affiliated Entity
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	1,000,000		1,000,000	3,000,000	3,100,000
Crestwood LTIP | Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Share-based Payment Arrangement, Expense	12,900,000		8,400,000	27,400,000	28,500,000
Crestwood LTIP | Crestwood Holdings
Related Party Transaction [Line Items]
Share-based Payment Arrangement, Expense	0		300,000	4,600,000	11,200,000
Stagecoach Gas Services LLC
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP	100,000		1,700,000	3,400,000	5,000,000
Tres Palacios Holdings LLC
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP	1,200,000		900,000	3,600,000	3,100,000
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP	$ 3,800,000		$ 2,400,000	$ 9,800,000	$ 8,600,000

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Subsequent Event (Details) - Oasis Midstream Partners LP - Subsequent Event shares in Millions, $ in Millions	Oct. 26, 2021 USD ($) shares
Subsequent Event [Line Items]
Consideration transferred | $	$ 1,800
Oasis Petroleum Inc.
Subsequent Event [Line Items]
Cash payment | $	$ 150
Issued shares (in shares)	21.0
Stock exchanged (in shares)	33.8
Oasis Midstream Public Unitholders
Subsequent Event [Line Items]
Issued shares (in shares)	12.9
Oasis Midstream Partners LP
Subsequent Event [Line Items]
Stock exchanged (in shares)	14.8
Oasis Petroleum General Partners
Subsequent Event [Line Items]
Cash payment | $	$ 10