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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Apr. 09, 2019
Related Party Transaction [Line Items]
Payments to Acquire Property, Plant, and Equipment	$ 83.2	$ 168.3	$ 455.5
Related Parties Amount in Cost of Sales	136.8	21.0	45.4
Related Party Transaction, Due from (to) Related Party [Abstract]
Related Party Transaction, Expenses from Transactions with Related Party	22.2	21.8	25.9
Revenues	4,569.0	2,254.3	3,181.9
Applied Consultants, Inc.
Related Party Transaction [Line Items]
Payments to Acquire Property, Plant, and Equipment	0.6	3.5	9.9
Affiliated Entity
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP(1)	27.2	27.8	2.9
Related Parties Amount in Cost of Sales	136.8	21.0	45.4
General and administrative expenses charged by CEQP to CMLP, net(4)	35.5	31.1	41.4
Crestwood Permian Basin Holdings LLC
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP(1)	26.2	27.8	1.0
Related Parties Amount in Cost of Sales	110.7	20.0	19.0
Related Party Transaction, Due from (to) Related Party [Abstract]
Revenues	1.0
Ascent Resources - Utica, LLC
Related Party Transaction [Line Items]
Related Parties Amount in Cost of Sales	14.5	0.4	23.9
Blue Racer Midstream, LLC
Related Party Transaction [Line Items]
Related Parties Amount in Cost of Sales			0.2
Stagecoach Gas Services LLC
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP(1)			1.2
Related Parties Amount in Cost of Sales			2.3
Westlake Chemical Corporation
Related Party Transaction [Line Items]
Revenues at CEQP and CMLP(1)			0.7
Tres Palacios Holdings LLC
Related Party Transaction [Line Items]
Related Parties Amount in Cost of Sales	11.6	0.6
CMLP
Related Party Transaction [Line Items]
Payments to Acquire Property, Plant, and Equipment	81.3	168.3	455.5
Related Parties Amount in Cost of Sales	136.8	21.0	45.4
Related Party Transaction, Due from (to) Related Party [Abstract]
Revenues	4,569.0	2,254.3	3,181.9
CMLP \| Affiliated Entity
Related Party Transaction [Line Items]
General and administrative expenses charged by CEQP to CMLP, net(4)	4.0	4.0	3.7
Related Party Transaction, Due from (to) Related Party [Abstract]
Accounts payable at CEQP	12.0	5.0
Crestwood Equity Partners LP
Related Party Transaction [Line Items]
Payments to Acquire Property, Plant, and Equipment	83.2	168.3	455.5
Related Party Transaction, (Income) Expenses from Transactions with Related Party	4.8	6.5	(0.6)
Crestwood Equity Partners LP \| Affiliated Entity
Related Party Transaction [Line Items]
General and administrative expenses charged by CEQP to CMLP, net(4)	0.2	2.1	1.3
Related Party Transaction, Due from (to) Related Party [Abstract]
Accounts receivable at CEQP and CMLP	8.2	2.5
Accounts payable at CEQP	12.0	7.5
Crestwood Niobrara LLC \| Williams Partners LP
Related Party Transaction, Due from (to) Related Party [Abstract]
Percentage of ownership				100.00%
Additional voting interest acquired				50.00%
Crestwood Long-Term Incentive Plan \| CMLP
Related Party Transaction [Line Items]
Allocated share based compensation expense	39.5	35.1	45.1
Crestwood Long-Term Incentive Plan \| Crestwood Holdings
Related Party Transaction [Line Items]
Allocated share based compensation expense	(4.6)	(4.4)	1.9
Stagecoach Gas Services LLC
Related Party Transaction, Due from (to) Related Party [Abstract]
Related Party Transaction, Expenses from Transactions with Related Party	3.4	6.6	7.5
Tres Palacios Holdings LLC
Related Party Transaction, Due from (to) Related Party [Abstract]
Related Party Transaction, Expenses from Transactions with Related Party	4.9	4.1	4.4
Crestwood Permian Basin Holdings
Related Party Transaction, Due from (to) Related Party [Abstract]
Related Party Transaction, Expenses from Transactions with Related Party	$ 13.9	$ 11.1	13.5
Jackalope Gas Gathering Services, LLC
Related Party Transaction, Due from (to) Related Party [Abstract]
Related Party Transaction, Expenses from Transactions with Related Party			$ 0.5