CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total		Common Stock [Member]	Additional paid-in Capital [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Accumulated Deficit [Member]	Note receivable from shareholder [Member]
Balance at Jun. 30, 2012	$ 410.4		$ 0.2	$ 425.3		$ (15.1)
Balance (in shares) at Jun. 30, 2012			223,000,000
Capital contributed (cash)	337.1			337.1
Non-cash contributions from CII, net	(0.1)			(0.1)
Stock-based compensation	0.9			0.9
Foreign currency translation adjustment	(4.8)				$ (4.8)
Net loss	(137.2)					(137.2)
Balance at Jun. 30, 2013	606.3		$ 0.2	763.2	(4.8)	(152.3)
Balance (in shares) at Jun. 30, 2013			223,000,000
Capital contributed, non-cash				22.0			$ (22.0)
Stock-based compensation	0.4			0.4
Foreign currency translation adjustment	19.2				19.2
CII Preferred Units issued for Corelink Data Centers, LLC purchase	1.6			1.6
Spin off of Onvoy, LLC	(31.8)			(31.8)
Net loss	(179.3)	[1]				(179.3)
Balance at Jun. 30, 2014	$ 416.4		$ 0.2	755.4	14.4	(331.6)	(22.0)
Balance (in shares) at Jun. 30, 2014	223,000,000		223,000,000
Proceeds from issuance of common stock	$ 387.2			387.2
Proceeds from issuance of common stock, shares			20,008,679
Reclassification of common unit liability to additional paid in capital	490.2			490.2
Stock-based compensation	95.0			95.0
Non-cash settlement of note receivable from Communications Infrastructure Investments,LLC				(22.0)			$ 22.0
Foreign currency translation adjustment	(22.3)				(22.3)
Net loss	(155.3)	[2]				(155.3)
Balance at Jun. 30, 2015	$ 1,211.2		$ 0.2	$ 1,705.8	$ (7.9)	$ (486.9)
Balance (in shares) at Jun. 30, 2015	243,008,679		243,008,679

[1] The Company realized an increase in revenue and operating expenses beginning August 1, 2013 as a result of the acquisition of Corelink.

[2] The Company realized an increase in revenue and operating expenses beginning July 1, 2014 as a result of the acquisition of AtlantaNap and Neo.