EQUITY AND CONVERTIBLE PREFERRED STOCK - Treasury Stock - Share Repurchase Program (Details) - Incremental Repurchase Program - Common Class A - USD ($)	Jun. 30, 2020	Feb. 03, 2016
Class of Stock [Line Items]
Stock repurchase program, authorized amount		$ 500,000,000.0
Amount remaining under current repurchase program	$ 396,800,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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