Segments (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Revenue, Major Customer [Line Items]
Revenues	$ 6,000.7	$ 4,569.0	$ 2,254.3
Number of operating segments | segment	3
Crestwood Equity Partners LP
Revenue, Major Customer [Line Items]
Earnings (Losses) Before Interest, Taxes, Depreciation and Amortization from Equity Method Investments	$ 14.3	187.4	42.9
CMLP
Revenue, Major Customer [Line Items]
Revenues	$ 6,000.7	$ 4,569.0	$ 2,254.3