Income Taxes - Effective income tax rate reconciliation to statutory federal rate (Details)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	21.00%	21.00%	21.00%
State and local income taxes	1.00%	1.40%	1.70%
Tax related to international activities	3.60%	1.80%	2.90%
Transition tax related to the TCJ Act	0	(0.007)	0.008
Remeasurement of deferred tax assets and liabilities related to the TCJ Act	0.00%	0.00%	(0.90%)
Cash surrender value of life insurance	(0.60%)	(0.30%)	(0.10%)
Federal manufacturing deduction	0.00%	0.00%	0.10%
Foreign derived intangible income deduction	(1.00%)	(1.50%)	(1.00%)
Research tax credit	(0.40%)	(0.60%)	(0.50%)
Share-based compensation	(1.60%)	(1.50%)	(1.70%)
Other	0.30%	0.60%	(0.50%)
Effective income tax rate	22.30%	20.20%	21.80%