Significant Accounting Policies Plant and equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Property, Plant and Equipment [Line Items]
Land and land improvements	$ 291,122	$ 294,537
Buildings and building equipment	1,437,601	1,457,650
Machinery and Equipment, Gross	2,933,818	3,017,011
Construction in Progress, Gross	74,600	93,413
Plant and equipment	$ 4,737,141	$ 4,862,611
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Minimum | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Minimum | Vehicles and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Maximum | Vehicles and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	8 years