COMMITMENTS AND CONTINGENCIES Environmental Remediation Obligations (Details) - USD ($) $ in Millions	Jun. 30, 2016	Jun. 30, 2011
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 92
Environmental exit costs, assets previously disposed, liability for remediation	41
Cass Lake, Minnesota [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 46	$ 46