SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable (Details) - USD ($) $ in Millions	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment, reduction to opening balance of retained earnings	$ (5,590)	$ (6,091)	$ (3,962)
Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment, reduction to opening balance of retained earnings	$ (13,912)	(12,244)	(10,134)	$ (9,984)
Cumulative effect of adoption of new accounting standards | Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment, reduction to opening balance of retained earnings		(121)	3	$ 29
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment, reduction to opening balance of retained earnings		$ 4
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2016-13 | Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment, reduction to opening balance of retained earnings			$ 3