Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (192.1)	$ (2,303.7)	$ (10.4)
Change in fair value of Suburban Propane Partners, L.P. units	0.8	(2.7)	(0.5)
Comprehensive loss	(191.3)	(2,306.4)	(10.9)
Comprehensive income (loss) attributable to non-controlling partners	(24.2)	636.8	66.8
Comprehensive income (loss) attributable to Crestwood Equity Partners LP	$ (215.5)	$ (1,669.6)	$ 55.9