FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Narrative) (Details) $ in Millions	9 Months Ended
Mar. 31, 2020 USD ($) instrument	Jun. 30, 2019 USD ($) instrument
Derivative [Line Items]
Maximum duration, foreign exchange contracts	2 years
Maximum duration, interest rate contracts	12 months
Number of interest rate derivatives held \| instrument	0	0
Estimated amount of the existing net gain (loss) to be reclassified into earnings in the next 12 months	$ (11)
Derivative instruments subject to contractually defined counterparty liability position limits	$ 5	$ 1
Total Commodity Purchase Derivative Contracts [Member]
Derivative [Line Items]
Maximum duration, commodity contracts	2 years
Notional amount	$ 31	24
Jet Fuel Swaps [Member]
Derivative [Line Items]
Notional amount	13	11
Soybean Oil Futures [Member]
Derivative [Line Items]
Notional amount	18	13
Soybean Oil Futures [Member] \| Commodity Contract [Member]
Derivative [Line Items]
Cash margin balances amount	2	1
Purchases of Inventory [Member] \| Foreign Exchange Contract [Member]
Derivative [Line Items]
Notional amount	$ 26	$ 61

Derivative instruments subject to contractually defined counterparty liability position limits.

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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Nominal or face amount used to calculate payment on derivative.

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Maximum period of time the entity is hedging its exposure to variability in future cash flows for forecasted transactions, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Excludes forecasted transactions related to payment of variable interest on existing financial instruments.

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