Supplemental Balance Sheet Information - Property and Equipment (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Property, Plant and Equipment, Net [Abstract]
Land Buildings And Improvements	$ 1,174.6		$ 1,174.6		$ 1,049.4
Machinery, equipment, and capitalized software	1,143.5		1,143.5		1,104.9
Furniture and fixtures	19.2		19.2		16.9
Construction in progress	426.9		426.9		278.9
Property, plant, and equipment, at cost	2,764.2		2,764.2		2,450.1
Accumulated depreciation	(994.7)		(994.7)		(913.4)
Property, plant, and equipment, net	1,769.5		1,769.5		$ 1,536.7
Depreciation Expense on Reclassified Assets	$ 41.8	$ 35.0	$ 121.0	$ 104.8

Land, buildings and improvements.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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For the asset that is reclassified back to held and use from held-for-sale, the depreciation expense recognized when the asset is reclassified. This represents the difference between the carrying value at the time the decision to reclassify is made and the carrying amount that the asset would have had if it had never been classified as held for sale (including consideration of depreciation expense).

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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