CASH AND CASH EQUIVALENTS, FUNDS RECEIVABLE AND CUSTOMER ACCOUNTS, AND INVESTMENTS - Schedule of Adjustments to Carrying Value of Equity Investments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Equity Securities without Readily Determinable Fair Value [Roll Forward]
Carrying amount, beginning of period	$ 1,485	$ 1,413	$ 1,509	$ 1,336
Adjustments related to non-marketable equity securities:
Net additions (reductions)	2	(76)	1	(54)
Gross unrealized gains	0	28	45	83
Gross unrealized losses and impairments	(63)	(6)	(131)	(6)
Carrying amount, end of period	$ 1,424	$ 1,359	$ 1,424	$ 1,359

Equity Securities Without Readily Determinable Fair Value, (Reductions) Additions, Net

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Equity Securities without Readily Determinable Fair Value [Roll Forward]

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Amount of investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of loss from downward price adjustment on investment in equity security without readily determinable fair value.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value.

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