CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenue	$ 550.2	$ 478.0	$ 1,561.8	$ 1,214.4
Operating costs and expenses
Operating costs (excluding depreciation and amortization and including stock-based compensation—Note 8)	195.0	170.8	548.7	396.0
Selling, general and administrative expenses (including stock-based compensation—Note 8)	108.8	112.5	319.1	282.1
Depreciation and amortization	155.7	137.2	425.6	368.0
Total operating costs and expenses	459.5	420.5	1,293.4	1,046.1
Operating income/(loss)	90.7	57.5	268.4	168.3
Other expenses
Interest expense	(63.0)	(57.7)	(170.0)	(162.7)
Loss on extinguishment of debt	(4.5)		(4.5)
Foreign currency gain/(loss) on intercompany loans	3.9	(11.1)	(24.7)	(28.9)
Other income/(expense), net	0.5	(0.2)	0.7	(0.4)
Total other expenses, net	(63.1)	(69.0)	(198.5)	(192.0)
Income/(loss) from operations before income taxes	27.6	(11.5)	69.9	(23.7)
Provision for income taxes	0.6	7.8	7.4	21.6
Net income/(loss)	$ 27.0	$ (19.3)	$ 62.5	$ (45.3)