Employee Benefit Plans (Pension Plan Asset Allocation by Asset Category) (Details)	Jun. 30, 2021	Jun. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Pension plans' asset allocations	100.00%	100.00%
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Pension plans' asset allocations	1.00%	1.00%
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Pension plans' asset allocations	38.00%	44.00%
U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Pension plans' asset allocations	19.00%	17.00%
International equity securities
Defined Benefit Plan Disclosure [Line Items]
Pension plans' asset allocations	15.00%	13.00%
Global equity securities
Defined Benefit Plan Disclosure [Line Items]
Pension plans' asset allocations	27.00%	25.00%