Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Allowance for doubtful accounts	$ 1.4	$ 1.9
Limited Partners' Capital Account, Units Issued	70,027,261	69,499,741
Limited Partners' Capital Account, Units Outstanding	70,027,261	69,499,741
Preferred Units, Issued	69,646,630	66,533,415
Preferred Units, Outstanding	69,646,630	66,533,415
Crestwood Midstream Partners LP
Allowance for doubtful accounts	$ 1.4	$ 1.9