POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - RECONCILIATION OF BENEFIT OBLIGATIONS AND PLAN ASSETS (Details) - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2022		Jun. 30, 2021		Jun. 30, 2020
Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning of Year	[1],[2]	$ 18,469		$ 17,761
Defined Benefit Plan, Service Cost		253	[2]	275	[2]	$ 247
Defined Benefit Plan, Interest Cost		253	[2]	240	[2]	276
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	[2]	14		13
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	[2],[3]	5		34
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	[2]	(4,067)		(466)
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits	[2]	4		17
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	[2]	(1,720)		1,220
Defined Benefit Plan, Benefit Obligation, Benefits Paid	[2]	(603)		(625)
Defined Benefit Plan, Benefit Obligation, End of Year	[1],[2]	12,608		18,469		17,761
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning of Year	[2]	13,041		11,484
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	[2]	(1,233)		1,058
Defined Benefit Plan, Plan Assets, Contributions by Employer	[2]	222		202
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	[2]	14		13
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	[2]	(1,268)		909
Defined Benefit Plan, ESOP Debt Servicing	[2],[4]	0		0
Defined Benefit Plan, Plan Assets, Benefits Paid	[2]	(603)		(625)
Defined Benefit Plan, Fair Value of Plan Assets, End of Year	[2]	10,173		13,041		11,484
Defined Benefit Plan, Funded (Unfunded) Status of Plan	[2]	(2,435)		(5,428)
Other Retiree Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning of Year	[1],[5]	4,206		4,770
Defined Benefit Plan, Service Cost		86	[5]	94	[5]	100
Defined Benefit Plan, Interest Cost		99	[5]	114	[5]	160
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	[5]	67		76
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	[3],[5]	(586)		0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	[5]	(586)		(678)
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits	[5]	1		2
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	[5]	51		64
Defined Benefit Plan, Benefit Obligation, Benefits Paid	[5]	(268)		(236)
Defined Benefit Plan, Benefit Obligation, End of Year	[1],[5]	3,070		4,206		4,770
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning of Year	[5]	6,444		5,618
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	[5]	526		879
Defined Benefit Plan, Plan Assets, Contributions by Employer	[5]	37		34
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	[5]	67		76
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	[5]	1		2
Defined Benefit Plan, ESOP Debt Servicing	[4],[5]	82		71
Defined Benefit Plan, Plan Assets, Benefits Paid	[5]	(268)		(236)
Defined Benefit Plan, Fair Value of Plan Assets, End of Year	[5]	6,889		6,444		$ 5,618
Defined Benefit Plan, Funded (Unfunded) Status of Plan	[5]	$ 3,819		$ 2,238

[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] Primarily relates to adjustments in the self-insured U.S. retiree health care program to utilize fully-insured Medicare Advantage Programs beginning in January 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.