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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021
Income Tax Contingency [Line Items]
Effective tax rate (as a percent)	22.50%	21.80%
Increase (decrease) in effective tax rate (as a percent)	0.70%
Gross unrecognized tax benefits	$ 71		$ 62
Total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate	62
Gross interest and penalty accrued	3
Total gross accrued interest and penalties related to unrecognized tax benefits	16		$ 14
Minimum
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	5
Maximum
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	$ 10

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- Definition

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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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 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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