Definite Lived Long-Lived Assets - Other Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 11.4	$ 11.0
Gross Carrying Value	646.1		$ 630.2
Accumulated Amortization	(376.9)		(357.1)
Net Carrying Value	$ 269.2		273.1
Core technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	18 years	18 years
Gross Carrying Value	$ 173.9		170.3
Accumulated Amortization	(79.2)		(74.8)
Net Carrying Value	$ 94.7		95.5
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	14 years	14 years
Gross Carrying Value	$ 260.1		253.0
Accumulated Amortization	(112.6)		(106.1)
Net Carrying Value	$ 147.5		146.9
Product relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	12 years	12 years
Gross Carrying Value	$ 212.1		206.9
Accumulated Amortization	(185.1)		(176.2)
Net Carrying Value	$ 27.0		$ 30.7