SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Income Taxes
Effective tax rate (as a percent)	105.00%	23.40%	30.00%	22.40%
Gross unrecognized tax benefits	$ 69		$ 69		$ 67
Total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate	52		52
Gross interest and penalty accrued	1		3
Total gross accrued interest and penalties related to unrecognized tax benefits	$ 13		$ 13		$ 12

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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