COMMITMENTS AND CONTINGENCIES Environmental Remediation Obligations (Details) - USD ($) $ in Millions	Mar. 31, 2016	Jun. 30, 2011
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 93
Environmental exit costs, assets previously disposed, liability for remediation	43
Cass Lake, Minnesota [Member]
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies	$ 47	$ 46