Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Total Stockholders' Equity/ Parent’s Net Investment	Non- controlling Interest
Beginning Balance (in shares) at Dec. 31, 2014		38.7
Beginning Balance at Dec. 31, 2014	$ 717.0	$ 0.4	$ 516.5	$ (55.9)	$ (0.3)	$ 460.7	$ 256.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(19.0)			(19.0)		(19.0)
Noncontrolling interest allocated net loss	4.6			4.6		4.6	(4.6)
Stock issuance costs	(0.8)		(0.8)			(0.8)
Stock based compensation (in shares)		0.3
Stock based compensation	10.5		10.5			10.5
Tax payment upon exercise of equity awards	(0.8)		(0.8)			(0.8)
Issuance of common stock (in shares)		27.3
Issuance of common stock	799.3	$ 0.2	799.1			799.3
Redemption of noncontrolling interest	(596.4)		(412.2)			(412.2)	(184.2)
Foreign currency translation adjustment	(0.4)				(0.4)	(0.4)
Dividends and distributions	(68.3)			(54.0)		(54.0)	(14.3)
Ending Balance (in shares) at Sep. 30, 2015		66.3
Ending Balance at Sep. 30, 2015	841.1	$ 0.6	912.3	(124.3)	(0.7)	787.9	53.2
Beginning Balance (in shares) at Dec. 31, 2015		72.6
Beginning Balance at Dec. 31, 2015	821.6	$ 0.7	967.2	(145.9)	(0.4)	821.6	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	19.1			19.1		19.1
Noncontrolling interest allocated net loss	0.0						0.0
Stock issuance costs	(1.6)		(1.6)			(1.6)
Stock based compensation (in shares)		0.6
Stock based compensation	8.5		8.5			8.5
Tax payment upon exercise of equity awards (in shares)		(0.5)
Tax payment upon exercise of equity awards	(13.7)		(13.7)			(13.7)
Issuance of common stock (in shares)		10.8
Issuance of common stock	448.6	$ 0.1	448.5			448.6
Foreign currency translation adjustment	(0.8)				(0.8)	(0.8)
Dividends and distributions	(92.0)			(92.0)		(92.0)	0.0
Ending Balance (in shares) at Sep. 30, 2016		83.5
Ending Balance at Sep. 30, 2016	$ 1,189.7	$ 0.8	$ 1,408.9	$ (218.8)	$ (1.2)	$ 1,189.7	$ 0.0