STOCKHOLDERS' EQUITY (Narrative) (Details)	3 Months Ended		6 Months Ended
	Dec. 31, 2019 USD ($) repurchase_program	Dec. 31, 2018 USD ($) repurchase_program	Dec. 31, 2019 USD ($) repurchase_program	Dec. 31, 2018 USD ($) repurchase_program
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of repurchase programs | repurchase_program	2	2	2	2
Long-Term Inter-Company Loans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Re-measurement gains (losses) on long-term intercompany loans	$ 0	$ (2,000,000)	$ (1,000,000)	$ (4,000,000)
Amounts reclassified from Accumulated other comprehensive net (loss) income	0	$ 0	0	$ 0
$2 Billion Open-Market Purchase Program [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stock repurchase program, authorized amount	2,000,000,000		2,000,000,000
Evergreen Program [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Authorization limit	$ 0		$ 0