PENSION, DEFERRED COMPENSATION AND POST-RETIREMENT BENEFIT PLANS - Benefit Obligation, Plan Assets and Amounts Recognized in Balance Sheet (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Change in plan assets:
Fair value of plan assets at beginning of year	$ 1,440
Fair value of plan assets at end of year	1,568	$ 1,440
Amounts recognized in the Balance Sheet consist of:
Accumulated other comprehensive loss	324
Pension Plans | U.S.
Change in benefit obligation:
Benefit obligation at beginning of year	966	896
Service cost	39	38	$ 37
Interest cost	35	37	33
Plan participant contributions	0	0
Actuarial loss (gain)	101	68
Foreign currency exchange rate impact	0	0
Benefits, expenses, taxes and premiums paid	(59)	(73)
Settlements	0	0
Benefit obligation at end of year	1,082	966	896
Change in plan assets:
Fair value of plan assets at beginning of year	832	838
Actual return on plan assets	109	48
Foreign exchange impact	0	0
Employer contributions	48	19
Plan participant contributions	0	0
Settlements	0	0
Benefits, expenses, taxes and premiums paid from plan assets	(59)	(73)
Fair value of plan assets at end of year	930	832	838
Funded status	(152)	(134)
Amounts recognized in the Balance Sheet consist of:
Other assets	0	2
Other accrued liabilities	(23)	(24)
Other noncurrent liabilities	(129)	(112)
Funded status	(152)	(134)
Accumulated other comprehensive loss	283	253
Net amount recognized	131	119
Pension Plans | International
Change in benefit obligation:
Benefit obligation at beginning of year	631	588
Service cost	36	30	30
Interest cost	11	13	13
Plan participant contributions	6	5
Actuarial loss (gain)	(12)	51
Foreign currency exchange rate impact	(1)	(18)
Benefits, expenses, taxes and premiums paid	(32)	(31)
Settlements	(3)	(7)
Benefit obligation at end of year	636	631	588
Change in plan assets:
Fair value of plan assets at beginning of year	577	561
Actual return on plan assets	43	32
Foreign exchange impact	(4)	(16)
Employer contributions	25	33
Plan participant contributions	6	5
Settlements	(4)	(7)
Benefits, expenses, taxes and premiums paid from plan assets	(32)	(31)
Fair value of plan assets at end of year	611	577	561
Funded status	(25)	(54)
Amounts recognized in the Balance Sheet consist of:
Other assets	127	103
Other accrued liabilities	(4)	(3)
Other noncurrent liabilities	(148)	(154)
Funded status	(25)	(54)
Accumulated other comprehensive loss	24	68
Net amount recognized	(1)	14
Other than Pension Plans Post-retirement
Change in benefit obligation:
Benefit obligation at beginning of year	183	170
Service cost	3	3	3
Interest cost	6	7	7
Plan participant contributions	0	1
Actuarial loss (gain)	6	10
Foreign currency exchange rate impact	(1)	(1)
Benefits, expenses, taxes and premiums paid	(7)	(7)
Settlements	0	0
Benefit obligation at end of year	190	183	170
Change in plan assets:
Fair value of plan assets at beginning of year	31	34
Actual return on plan assets	3	2
Foreign exchange impact	0	0
Employer contributions	0	1
Plan participant contributions	0	1
Settlements	0	0
Benefits, expenses, taxes and premiums paid from plan assets	(7)	(7)
Fair value of plan assets at end of year	27	31	$ 34
Funded status	(163)	(152)
Amounts recognized in the Balance Sheet consist of:
Other assets	0	0
Other accrued liabilities	0	0
Other noncurrent liabilities	(163)	(152)
Funded status	(163)	(152)
Accumulated other comprehensive loss	17	13
Net amount recognized	$ (146)	$ (139)