STATEMENT OF CASH FLOWS (Details) - USD ($) $ in Millions	9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash:
Cash paid during the period for interest	$ 94	$ 99
Cash paid during the period for income taxes	472	400
Non-cash investing and financing activities:
Capital lease, capitalized interest and asset retirement obligations incurred	0	8
Property, plant and equipment accrued but unpaid	$ 47	$ 39