INCOME TAXES (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Tax Credit and Operating Loss Carryforwards [Line Items]
Statutory federal tax rate			28.10%	35.00%	35.00%
Tax Cuts And Jobs Act Of 2017, change in tax rate, deferred tax liability, provisional income tax (expense) benefit	$ 33
Tax Cuts And Jobs Act Of 2017, transition tax for accumulated foreign earnings, deferred tax liability, provisional income tax expense (benefit)	(27)
Tax Cuts And Jobs Act Of 2017, deferred tax liability, provisional income tax expense (benefit)	(60)
Tax Cuts And Jobs Act Of 2017, transition tax for accumulated foreign earnings, income tax expense (benefit), incomplete accounting, provisional amount	7
Tax Cuts And Jobs Act Of 2017, provisional income tax expense (benefit), current taxable year	(28)
Tax Cuts And Jobs Act Of 2017, provisional income tax benefit	$ (81)
Excess tax benefits			$ 19	$ 22
Income tax effects allocated directly to equity, employee stock options					$ 51
Unrecognized tax benefits, income tax penalties and interest accrued			5	3
Unrecognized tax benefits, income tax penalties and interest expense			1	(1)	(1)
Unrecognized tax benefits that would impact effective tax rate			33	28	27
Gross unrecognized tax benefits recognized upon the expiration of the applicable statute of limitations			2	$ 1	$ 4
Foreign Tax Credit Carryforward [Member] | Domestic Tax Authority [Member]
Tax Credit and Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount			27
Foreign Tax Credit Carryforward [Member] | Foreign Tax Authority [Member]
Tax Credit and Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount			23
Not Subject to Expiration [Member] | Foreign Tax Authority [Member]
Tax Credit and Operating Loss Carryforwards [Line Items]
Operating loss carryforwards			11
Not Subject to Expiration [Member] | Foreign Tax Credit Carryforward [Member] | Foreign Tax Authority [Member]
Tax Credit and Operating Loss Carryforwards [Line Items]
Tax credit carryforward, amount			1
Subject to Expiration [Member] | Foreign Tax Authority [Member]
Tax Credit and Operating Loss Carryforwards [Line Items]
Operating loss carryforwards			$ 25
Scenario, Forecast [Member]
Tax Credit and Operating Loss Carryforwards [Line Items]
Statutory federal tax rate		21.00%