STATEMENT OF CASH FLOWS (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Cash:
Cash paid during the year for interest	$ 153	$ 131	$ 128
Cash paid during the year for income taxes	537	588	351
Non-cash investing and financing activities:
Purchase price refund receivable	32	0	0
Capital lease, capitalized interest and asset retirement obligations incurred	2	15	9
Non-cash purchases of short- and long-term investments, net	0	0	14
Property, plant and equipment accrued but unpaid	$ 39	$ 52	$ 43