Supplemental Balance Sheet Information - Other Assets Non Current (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Balance Sheet Related Disclosures [Abstract]
Deferred Tax Assets, Net, Noncurrent	$ 0.0	$ 45.4	[1]
Deferred Compensation Plan Assets	15.4	11.1
Deferred long term debt financing costs	1.2	1.8
Other Assets, Miscellaneous, Noncurrent	10.9	8.8
Other Assets, Noncurrent	$ 27.5	$ 67.1

[1] The Company transferred certain intellectual property assets between jurisdictions in the year ended June 30, 2016 resulting in a non-current deferred tax charge asset. This asset was subsequently adjusted as a result of the adoption of a new accounting standard on income tax accounting for intra-entity asset transfer other than inventory. Refer to Note 1 for further details on the adoption of ASU 2016-16.