COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Environmental Remediation Obligations) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2011
Site Contingency [Line Items]
Accrual for environmental loss contingencies	$ 96
Environmental exit costs, assets previously disposed, liability for remediation	46
Cass Lake, Minnesota [Member]
Site Contingency [Line Items]
Accrual for environmental loss contingencies	$ 48	$ 46