Employee Benefits - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) - $ / shares	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Employee Benefits
Fair Value Assumptions, Expected Dividend Yield	1.60%	1.51%	1.18%
Fair Value Assumptions Expected Volatility Rate	22.55%	20.39%	20.42%
Fair Value Assumptions Risk Free Interest Rate	1.55%	2.67%	2.54%
Fair value assumptions weighted-average expected life (years)	10 years	10 years	10 years
Fair value assumptions weighted-average fair value of	$ 8.81	$ 8.78	$ 10.14