Employee Benefit Plans (Pension Plans' Target Asset Allocation Ranges) (Details)	12 Months Ended
	Jun. 30, 2018
Minimum [Member] | United States Fixed Income Securities
Investment [Line Items]
Defined Benefit Plan, Target Allocation Percentage	0.35
Minimum [Member] | United States Equity Securities [Member]
Investment [Line Items]
Defined Benefit Plan, Target Allocation Percentage	0.14
Minimum [Member] | International Securities [Member]
Investment [Line Items]
Defined Benefit Plan, Target Allocation Percentage	0.11
Minimum [Member] | Global Equity Securities [Domain]
Investment [Line Items]
Defined Benefit Plan, Target Allocation Percentage	0.2
Maximum [Member] | United States Fixed Income Securities
Investment [Line Items]
Defined Benefit Plan, Target Allocation Percentage	0.45
Maximum [Member] | United States Equity Securities [Member]
Investment [Line Items]
Defined Benefit Plan, Target Allocation Percentage	0.24
Maximum [Member] | International Securities [Member]
Investment [Line Items]
Defined Benefit Plan, Target Allocation Percentage	0.21
Maximum [Member] | Global Equity Securities [Domain]
Investment [Line Items]
Defined Benefit Plan, Target Allocation Percentage	0.3