RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - LIABILITIES - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	Jun. 30, 2016	Jun. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value	$ 24,362	$ 23,127
Long Term Debt, Current Maturities Measured at Fair Value	2,761	2,776
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value	$ 2,331	$ 2,180