STOCK PROGRAMS - Share Units, Cash Units (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Non-employee Director Deferred Cash Compensation, Cash Payout Shares
Deferred compensation expense (income) to reflect additional deferrals and change in market value (in dollars)	$ 16	$ 6	$ 6
Share Units
Shares
Outstanding at the beginning of the period (in shares)	131,600
Granted (in shares)	6,400
Dividend equivalents (in shares)	1,500
Outstanding at the end of the period (in shares)	139,500	131,600
Weighted-Average Grant Date Fair Value Per Share
Outstanding at the beginning of the period (in dollars per share)	$ 47.87
Grant date fair value (in dollars per share)	116.04
Dividend equivalents (in dollars per share)	134.04
Outstanding at the end of the period (in dollars per share)	$ 51.97	$ 47.87
Cash Units
Non-employee Director Deferred Cash Compensation, Cash Payout Shares
Deferred compensation expense (income) to reflect additional deferrals and change in market value (in dollars)	$ 12	$ 2	$ 2