Segment Information - Reconciliation of Earnings / (Loss) from Continuing Operations to Ebitda (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting [Abstract]
Segment Reporting Information Unallocated Expense	[1]	$ 63.9	$ 26.0	$ 134.6	$ 95.2
Depreciation and amortization		64.8	66.4	187.3	173.9
Interest expense, net		34.4	26.4	105.6	80.0
Income tax expense(benefit)		8.8	10.9	14.9	14.2
Earnings/(loss) from continuing operations		$ 20.9	$ 31.7	$ 66.5	$ 66.3

[1] Unallocated costs include restructuring and special items, equity-based compensation, impairment charges, certain other corporate directed costs, and other costs that are not allocated to the segments as follows: