Difference Between Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes (Detail)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	28.10%	35.00%
Effect of:
Foreign earnings taxed at lower rates	(4.10%)	(7.80%)	(11.60%)
Impact of the enactment of the TCJA	0.40%	37.70%	0.00%
Phone business losses	0.00%	0.00%	(5.70%)
Impact of intangible property transfers	(5.90%)	0.00%	0.00%
Foreign-derived intangible income deduction	(1.40%)	(0.00%)	(0.00%)
Research and development credit	(1.10%)	(1.30%)	(0.90%)
Excess tax benefits relating to stock-based compensation	(2.20%)	(2.50%)	(2.10%)
Interest, net	1.00%	1.20%	1.40%
Other reconciling items, net	2.50%	(0.80%)	(1.30%)
Effective rate	10.20%	54.60%	14.80%