POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - RECONCILIATION OF BENEFIT OBLIGATIONS AND PLAN ASSETS (Details) - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2021
Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning of Year	[1],[2]	$ 12,608		$ 18,469
Defined Benefit Plan, Service Cost		173	[2]	253	[2]	$ 275
Defined Benefit Plan, Interest Cost		430	[2]	253	[2]	240
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	[2]	13		14
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	[2],[3]	8		5
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	[2]	(550)		(4,067)
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits	[2]	5		4
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	[2]	363		(1,720)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	[2]	(551)		(603)
Defined Benefit Plan, Benefit Obligation, End of Year	[1],[2]	12,499		12,608		18,469
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning of Year	[2]	10,173		13,041
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	[2]	37		(1,233)
Defined Benefit Plan, Plan Assets, Contributions by Employer	[2]	392		222
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	[2]	13		14
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	[2]	310		(1,268)
Defined Benefit Plan, ESOP Debt Servicing	[2],[4]	0		0
Defined Benefit Plan, Plan Assets, Benefits Paid	[2]	(551)		(603)
Defined Benefit Plan, Fair Value of Plan Assets, End of Year	[2]	10,374		10,173		13,041
Defined Benefit Plan, Funded (Unfunded) Status of Plan	[2]	(2,125)		(2,435)
Other Retiree Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning of Year	[1],[5]	3,070		4,206
Defined Benefit Plan, Service Cost		71	[5]	86	[5]	94
Defined Benefit Plan, Interest Cost		142	[5]	99	[5]	114
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	[5]	50		67
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	[3],[5]	0		(586)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	[5]	(208)		(586)
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits	[5]	4		1
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	[5]	31		51
Defined Benefit Plan, Benefit Obligation, Benefits Paid	[5]	(227)		(268)
Defined Benefit Plan, Benefit Obligation, End of Year	[1],[5]	2,933		3,070		4,206
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning of Year	[5]	6,889		6,444
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	[5]	482		526
Defined Benefit Plan, Plan Assets, Contributions by Employer	[5]	42		37
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	[5]	50		67
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	[5]	1		1
Defined Benefit Plan, ESOP Debt Servicing	[4],[5]	87		82
Defined Benefit Plan, Plan Assets, Benefits Paid	[5]	(227)		(268)
Defined Benefit Plan, Fair Value of Plan Assets, End of Year	[5]	7,324		6,889		$ 6,444
Defined Benefit Plan, Funded (Unfunded) Status of Plan	[5]	$ 4,391		$ 3,819

[1] For the pension benefit plans, the benefit obligation is the projected benefit obligation. For other retiree benefit plans, the benefit obligation is the accumulated postretirement benefit obligation.

[2] Primarily non-U.S.-based defined benefit retirement plans.

[3] For the other retiree benefits, the amendment primarily relates to adjustments in the self-insured U.S. retiree health care program to utilize fully-insured Medicare Advantage Programs impacting fiscal year 2022.

[4] Represents the net impact of ESOP debt service requirements, which is netted against plan assets for other retiree benefits.

[5] Primarily U.S.-based other postretirement benefit plans.