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Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Related Party Transaction [Line Items]
Purchases of property, plant and equipment	$ 26.4	$ 9.3
Costs of product/services sold at CEQP and CMLP(2)	68.5	41.1
Operations and maintenance expenses charged by CEQP and CMLP	4.8	5.7
Related Party Transaction, Due from (to) Related Party [Abstract]
Related party receivables	60.2		$ 8.2
Related party payables	16.4		$ 12.0
Revenues	1,583.8	1,032.7
Product
Related Party Transaction, Due from (to) Related Party [Abstract]
Revenues	1,390.5	930.6
Service
Related Party Transaction, Due from (to) Related Party [Abstract]
Revenues	95.6	97.2
Applied Consultants, Inc.
Related Party Transaction [Line Items]
Purchases of property, plant and equipment		0.3
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	1.6	4.9
Costs of product/services sold at CEQP and CMLP(2)	36.2	30.3
Related Party Transaction, Due from (to) Related Party [Abstract]
Revenues	0.5
Tres Palacios Holdings LLC
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP(2)	0.9	10.8
Affiliated Entity
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	97.7	4.9
Costs of product/services sold at CEQP and CMLP(2)	68.5	41.1
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	7.5	5.9
Oasis Petroleum Inc.
Related Party Transaction [Line Items]
Costs of product/services sold at CEQP and CMLP(2)	31.4
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	0.9	0.0
Oasis Petroleum Inc. \| Product
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	59.0
Oasis Petroleum Inc. \| Service
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP	36.6
Crestwood Equity Partners LP \| Affiliated Entity
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party		0.2
Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Purchases of property, plant and equipment	26.4	9.3
Costs of product/services sold at CEQP and CMLP(2)	68.5	41.1
Related Party Transaction, Due from (to) Related Party [Abstract]
Revenues	1,583.8	1,032.7
Crestwood Midstream Partners LP \| Product
Related Party Transaction, Due from (to) Related Party [Abstract]
Revenues	1,390.5	930.6
Crestwood Midstream Partners LP \| Service
Related Party Transaction, Due from (to) Related Party [Abstract]
Revenues	95.6	97.2
Crestwood Midstream Partners LP \| Affiliated Entity
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	1.1	1.0
Crestwood LTIP \| Crestwood Midstream Partners LP
Related Party Transaction [Line Items]
Share-based Payment Arrangement, Expense	8.6	6.9
Crestwood LTIP \| Crestwood Holdings
Related Party Transaction [Line Items]
Share-based Payment Arrangement, Expense		4.6
Stagecoach Gas Services LLC
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP		1.7
Tres Palacios Holdings LLC
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP	1.2	1.2
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
Operations and maintenance expenses charged by CEQP and CMLP	$ 3.6	$ 2.8