FUNDS RECEIVABLE AND CUSTOMER ACCOUNTS AND INVESTMENTS - Schedule of Unrealized Gains (Losses) on Strategic Investments, Excluding Those Accounted for Using the Equity Method (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Net unrealized losses	$ (36)	$ (149)