Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Revenues	$ 1,448.0	$ 929.6	$ 3,031.8	$ 1,962.3
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 15)	113.1	25.4	181.6	66.5
Total costs of product/services sold	1,213.2	797.2	2,577.6	1,611.0
Operating expenses and other:
Operations and maintenance	46.6	25.8	89.0	58.6
General and administrative	26.5	22.8	69.9	41.5
Depreciation, amortization and accretion	80.6	58.8	155.4	118.0
(Gain) loss on long-lived assets, net	7.2	(0.3)	11.0	1.1
Total expenses	160.9	107.1	325.3	219.2
Operating income (loss)	73.9	25.3	128.9	132.1
Earnings (loss) from unconsolidated affiliates, net	6.0	(27.1)	9.0	(130.8)
Interest and debt expense, net	(40.1)	(35.1)	(76.2)	(71.1)
Gain (Loss) on Extinguishment of Debt	0.0	(1.2)	0.0	(6.7)
Other income (expense), net	(0.1)	0.1	0.2	0.1
Income (loss) before income taxes	39.7	(38.0)	61.9	(76.4)
Provision for income taxes	(0.3)	(0.1)	(0.3)	0.0
Net income (loss)	39.4	(38.1)	61.6	(76.4)
Net income attributable to non-controlling partner	10.3	10.3	20.5	20.4
Net income (loss) attributable to parent	29.1	(48.4)	41.1	(96.8)
Net income attributable to preferred unit holders	15.0	15.0	30.0	30.0
Net income (loss) attributable to partners	$ 14.1	$ (63.4)	$ 11.1	$ (126.8)
Net income (loss) per limited partner unit: (Note 12)
Basic (in dollars per share)	$ 0.14	$ (1.00)	$ 0.12	$ (1.85)
Diluted (in dollars per share)	$ 0.14	$ (1.00)	$ 0.11	$ (1.85)
Weighted-average limited partners’ units outstanding:
Basic (units)	98.0	63.5	92.0	68.4
Dilutive units (units)	4.6	0.0	4.7	0.0
Diluted (units)	102.6	63.5	96.7	68.4
Affiliated Entity
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 15)	$ 113.1	$ 25.4	$ 181.6	$ 66.5
Crestwood Midstream Partners LP
Revenues:
Revenues	1,448.0	929.6	3,031.8	1,962.3
Costs of product/services sold (exclusive of items shown separately below):
Product costs - related party (Note 15)	113.1	25.4	181.6	66.5
Total costs of product/services sold	1,213.2	797.2	2,577.6	1,611.0
Operating expenses and other:
Operations and maintenance	46.6	25.8	89.0	58.6
General and administrative	25.0	19.7	66.7	36.9
Depreciation, amortization and accretion	83.0	62.2	161.2	125.0
(Gain) loss on long-lived assets, net	60.5	(0.3)	64.3	1.1
Total expenses	215.1	107.4	381.2	221.6
Operating income (loss)	19.7	25.0	73.0	129.7
Earnings (loss) from unconsolidated affiliates, net	6.0	(27.1)	9.0	(130.8)
Interest and debt expense, net	(40.1)	(35.1)	(76.2)	(71.1)
Gain (Loss) on Extinguishment of Debt	0.0	(1.2)	0.0	(6.7)
Income (loss) before income taxes	(14.4)	(38.4)	5.8	(78.9)
Provision for income taxes	(0.2)	(0.1)	(0.2)	0.0
Net income (loss)	(14.6)	(38.5)	5.6	(78.9)
Net income attributable to non-controlling partner	10.3	10.3	20.5	20.4
Net income (loss) attributable to parent	(24.9)	(48.8)	(14.9)	(99.3)
Product
Revenues:
Revenues	1,215.0	820.7	2,605.5	1,751.3
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	1,094.0	768.0	2,384.8	1,535.6
Product | Crestwood Midstream Partners LP
Revenues:
Revenues	1,215.0	820.7	2,605.5	1,751.3
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	1,094.0	768.0	2,384.8	1,535.6
Service
Revenues:
Revenues	98.8	95.7	194.4	192.9
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	6.1	3.8	11.2	8.9
Service | Crestwood Midstream Partners LP
Revenues:
Revenues	98.8	95.7	194.4	192.9
Costs of product/services sold (exclusive of items shown separately below):
Costs of product/services sold	6.1	3.8	11.2	8.9
Product, Related Party
Revenues:
Revenues	78.9	12.8	139.5	17.7
Product, Related Party | Crestwood Midstream Partners LP
Revenues:
Revenues	78.9	12.8	139.5	17.7
Service, Related Party
Revenues:
Revenues	55.3	0.4	92.4	0.4
Service, Related Party | Crestwood Midstream Partners LP
Revenues:
Revenues	$ 55.3	$ 0.4	$ 92.4	$ 0.4