Defined Benefit Pension Obligation - Assumptions (Details) - Defined benefit pension plan	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Net Periodic Benefit Costs:
Discount rate (as a percent)	0.25%	0.45%	0.90%
Rate of compensation increase (as a percent)	1.50%	1.50%	1.50%
Expected long-term return on assets (as a percent)	1.00%	1.20%	1.40%
Benefit Obligation:
Discount rate (as a percent)	0.25%	0.45%
Rate of compensation increase (as a percent)	1.50%	1.50%