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Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Mar. 31, 2020 USD ($)
Goodwill [Line Items]
Balance as of June 30, 2019	$ 5,156.0
Acquisition and acquisition adjustments	117.2
Currency translation	(46.4)
Balance as of March 31, 2020	5,226.8
Flexibles
Goodwill [Line Items]
Balance as of June 30, 2019	4,180.8
Acquisition and acquisition adjustments	117.2
Currency translation	(38.1)
Balance as of March 31, 2020	4,259.9
Rigid Packaging
Goodwill [Line Items]
Balance as of June 30, 2019	975.2
Acquisition and acquisition adjustments	0.0
Currency translation	(8.3)
Balance as of March 31, 2020	$ 966.9

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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