STATEMENT OF CASH FLOWS (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Cash:
Cash paid during the year for interest	$ 128	$ 96	$ 79
Cash paid during the year for income taxes	351	456	451
Non-cash investing and financing activities:
Capital lease and asset retirement obligations incurred	9	12	27
Noncash purchases (sales) of short- and long-term investments, net	14	6	(3)
Property, plant and equipment accrued but unpaid	$ 43	$ 29	$ 29