Quarterly Financial Information (Unaudited) - Schedule of Quarterly Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended				3 Months Ended								11 Months Ended	12 Months Ended
	Jun. 30, 2015	Apr. 30, 2015	Jun. 30, 2014	Jan. 23, 2013	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Revenue				$ 15.1	$ 113.3	$ 111.2	$ 89.1	$ 85.7	$ 86.9	$ 84.8	$ 81.7	$ 77.5	$ 248.4	$ 399.3	$ 330.9
Operating income (loss)				(17.3)	11.1	7.5	2.6	1.6	11.2	9.6	7.4	11.8	28.9	22.8	40.0
Net loss				$ (20.2)	(1.2)	(5.3)	(6.5)	(7.2)	(11.8)	0.2	(3.6)	0.7	(15.6)	(20.2)	(14.5)
Net loss attributed to common shareholders					$ (1.0)	$ (4.6)	$ (5.5)	$ (4.3)	$ (7.0)	$ 0.1	$ (1.1)	$ 0.2	$ (5.3)	$ (15.4)	$ (7.8)	$ (5.3)
Loss per share, including anti-dilutive securities - basic and diluted (in dollars per share)					$ (0.02)	$ (0.08)	$ (0.11)	$ (0.12)	$ (0.19)	$ 0.00	$ (0.06)	$ 0.00		$ (0.33)	$ (0.25)
Loss per share - basic and diluted (in dollars per share)														$ (0.30)	$ (0.30)
IPO
Class of Stock [Line Items]
Anti-dilutive securities excluded from diluted earning per share (in shares)	6.0	14.3	16.0