CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Revenue	$ 369.6	$ 323.9	$ 736.4	$ 644.5
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation-Note 8)	112.2	97.8	225.2	205.1
Selling, general and administrative expenses (including stock-based compensation-Note 8)	85.0	32.1	169.6	188.9
Depreciation and amortization	113.7	96.9	230.8	192.9
Total operating costs and expenses	310.9	226.8	625.6	586.9
Operating income/(loss)	58.7	97.1	110.8	57.6
Other expenses
Interest expense	(51.2)	(53.4)	(105.0)	(100.3)
Loss on extinguishment of debt		(30.9)		(30.9)
Foreign currency loss on intercompany loans	(7.1)	(13.3)	(17.8)	(27.9)
Other expense, net	(0.1)	(0.1)	(0.2)	(0.2)
Total other expenses, net	(58.4)	(97.7)	(123.0)	(159.3)
Loss from operations before income taxes	0.3	(0.6)	(12.2)	(101.7)
Provision for income taxes	11.1	(4.4)	13.8	5.0
Net loss	$ (10.8)	$ 3.8	$ (26.0)	$ (106.7)
Weighted-average shares used to compute net loss per share:
Basic	244.8	236.2	243.9	229.6
Diluted	244.8	237.2	243.9	229.6
Net loss per share:
Basic	$ (0.04)	$ 0.02	$ (0.11)	$ (0.46)
Diluted	$ (0.04)	$ 0.02	$ (0.11)	$ (0.46)