Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,303.7)	$ (10.4)	$ (50.6)
Change in fair value of Suburban Propane Partners, L.P. units (Note 12)	(2.7)	(0.5)	(0.1)
Comprehensive loss	(2,306.4)	(10.9)	(50.7)
Comprehensive loss attributable to non-controlling interest	636.8	66.8	57.3
Comprehensive income (loss) attributable to Crestwood Equity Partners LP	$ (1,669.6)	$ 55.9	$ 6.6