CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 643.5	$ 504.9
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation—Note 8)	235.7	173.8
Selling, general and administrative expenses (including stock-based compensation—Note 8)	128.3	105.6
Depreciation and amortization	184.1	138.5
Total operating costs and expenses	548.1	417.9
Operating income	95.4	87.0
Other expenses
Interest expense	(73.6)	(53.3)
Loss on extinguishment of debt	(4.9)
Foreign currency income/(loss) on intercompany loans	10.8	(11.2)
Other income/(expense), net	0.9	(0.2)
Total other expenses, net	(66.8)	(64.7)
Income from operations before income taxes	28.6	22.3
Provision for income taxes	5.4	6.6
Net income	$ 23.2	$ 15.7
Weighted-average shares used to compute net income per share:
Basic	246.5	242.6
Diluted	248.0	244.0
Net income per share:
Basic and diluted	$ 0.09	$ 0.06