SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Issued Accounting Standards (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Jul. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jul. 01, 2018
Recently Issued Accounting Standards
Future minimum lease commitments			$ 3,320
Selling, general and administrative expenses			8,556	$ 7,469	$ 7,338
Cost of sales			2,844	2,437	$ 2,181
Retained earnings			$ 9,040	$ 8,452
Accounting Standards Update 2014-09 | Forecast
Recently Issued Accounting Standards
Selling, general and administrative expenses	$ (325)
Cost of sales	$ 325
Expected reduction in net sales (as a percent)		1.00%
Expected reduction to diluted net earnings per common share		$ 0.10
Accounting Standards Update 2014-09 | Forecast | Maximum
Recently Issued Accounting Standards
Expected reduction in net sales (as a percent)		1.00%
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Forecast | Minimum
Recently Issued Accounting Standards
Retained earnings						$ (200)
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Forecast | Maximum
Recently Issued Accounting Standards
Retained earnings						$ (250)