FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets:
Funds receivable and customer accounts	$ 34,824	$ 36,141
Liabilities:
Cash	5,800	4,800
Short-term restricted cash	21	109
Time deposits	438	635
Carrying value of non-marketable equity securities which do not have readily determinable fair value	1,900	1,300
Cash and cash equivalents
Assets:
Funds receivable and customer accounts	10,044	12,723
Cash, time deposits and funds receivable
Assets:
Funds receivable and customer accounts	15,500	17,200
Fair value, measurements, recurring basis
Assets:
Cash and cash equivalents	893	400
Funds receivable and customer accounts	19,316	18,958
Derivatives	1,015	304
Crypto asset safeguarding asset	690
Total financial assets	28,973	28,671
Liabilities:
Derivatives	187	130
Crypto asset safeguarding liability	690
Total financial liabilities	877
Fair value, measurements, recurring basis | Cash and cash equivalents
Assets:
Funds receivable and customer accounts	400	622
Fair value, measurements, recurring basis | U.S. government and agency securities
Assets:
Funds receivable and customer accounts	9,410	8,723
Fair value, measurements, recurring basis | Foreign government and agency securities
Assets:
Funds receivable and customer accounts	2,290	4,090
Fair value, measurements, recurring basis | Corporate debt securities
Assets:
Funds receivable and customer accounts	1,748	3,439
Fair value, measurements, recurring basis | Asset-backed securities
Assets:
Funds receivable and customer accounts	1,343	1,549
Fair value, measurements, recurring basis | Commercial paper
Assets:
Funds receivable and customer accounts	3,801
Fair value, measurements, recurring basis | Municipal securities
Assets:
Funds receivable and customer accounts	324	535
Fair value, measurements, recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	0	0
Funds receivable and customer accounts	0	0
Derivatives	0	0
Crypto asset safeguarding asset	0
Total financial assets	361	1,860
Liabilities:
Derivatives	0	0
Crypto asset safeguarding liability	0
Total financial liabilities	0
Fair value, measurements, recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents
Assets:
Funds receivable and customer accounts	0	0
Fair value, measurements, recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government and agency securities
Assets:
Funds receivable and customer accounts	0	0
Fair value, measurements, recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign government and agency securities
Assets:
Funds receivable and customer accounts	0	0
Fair value, measurements, recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities
Assets:
Funds receivable and customer accounts	0	0
Fair value, measurements, recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities
Assets:
Funds receivable and customer accounts	0	0
Fair value, measurements, recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial paper
Assets:
Funds receivable and customer accounts	0
Fair value, measurements, recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal securities
Assets:
Funds receivable and customer accounts	0	0
Fair value, measurements, recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	893	400
Funds receivable and customer accounts	19,316	18,958
Derivatives	1,015	304
Crypto asset safeguarding asset	690
Total financial assets	28,612	26,811
Liabilities:
Derivatives	187	130
Crypto asset safeguarding liability	690
Total financial liabilities	877
Fair value, measurements, recurring basis | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents
Assets:
Funds receivable and customer accounts	400	622
Fair value, measurements, recurring basis | Significant Other Observable Inputs (Level 2) | U.S. government and agency securities
Assets:
Funds receivable and customer accounts	9,410	8,723
Fair value, measurements, recurring basis | Significant Other Observable Inputs (Level 2) | Foreign government and agency securities
Assets:
Funds receivable and customer accounts	2,290	4,090
Fair value, measurements, recurring basis | Significant Other Observable Inputs (Level 2) | Corporate debt securities
Assets:
Funds receivable and customer accounts	1,748	3,439
Fair value, measurements, recurring basis | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Assets:
Funds receivable and customer accounts	1,343	1,549
Fair value, measurements, recurring basis | Significant Other Observable Inputs (Level 2) | Commercial paper
Assets:
Funds receivable and customer accounts	3,801
Fair value, measurements, recurring basis | Significant Other Observable Inputs (Level 2) | Municipal securities
Assets:
Funds receivable and customer accounts	324	535
Fair value, measurements, recurring basis | Short-term investments
Assets:
Investments	3,786	3,604
Fair value, measurements, recurring basis | Short-term investments | U.S. government and agency securities
Assets:
Investments	72	537
Fair value, measurements, recurring basis | Short-term investments | Foreign government and agency securities
Assets:
Investments	467	505
Fair value, measurements, recurring basis | Short-term investments | Corporate debt securities
Assets:
Investments	955	2,285
Fair value, measurements, recurring basis | Short-term investments | Asset-backed securities
Assets:
Investments	513	277
Fair value, measurements, recurring basis | Short-term investments | Commercial paper
Assets:
Investments	1,779
Fair value, measurements, recurring basis | Short-term investments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Investments	0	0
Fair value, measurements, recurring basis | Short-term investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government and agency securities
Assets:
Investments	0	0
Fair value, measurements, recurring basis | Short-term investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign government and agency securities
Assets:
Investments	0	0
Fair value, measurements, recurring basis | Short-term investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities
Assets:
Investments	0	0
Fair value, measurements, recurring basis | Short-term investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities
Assets:
Investments	0	0
Fair value, measurements, recurring basis | Short-term investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial paper
Assets:
Investments	0
Fair value, measurements, recurring basis | Short-term investments | Significant Other Observable Inputs (Level 2)
Assets:
Investments	3,786	3,604
Fair value, measurements, recurring basis | Short-term investments | Significant Other Observable Inputs (Level 2) | U.S. government and agency securities
Assets:
Investments	72	537
Fair value, measurements, recurring basis | Short-term investments | Significant Other Observable Inputs (Level 2) | Foreign government and agency securities
Assets:
Investments	467	505
Fair value, measurements, recurring basis | Short-term investments | Significant Other Observable Inputs (Level 2) | Corporate debt securities
Assets:
Investments	955	2,285
Fair value, measurements, recurring basis | Short-term investments | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Assets:
Investments	513	277
Fair value, measurements, recurring basis | Short-term investments | Significant Other Observable Inputs (Level 2) | Commercial paper
Assets:
Investments	1,779
Fair value, measurements, recurring basis | Long-Term Investments
Assets:
Investments	3,273	5,405
Fair value, measurements, recurring basis | Long-Term Investments | U.S. government and agency securities
Assets:
Investments	454	562
Fair value, measurements, recurring basis | Long-Term Investments | Foreign government and agency securities
Assets:
Investments	376	736
Fair value, measurements, recurring basis | Long-Term Investments | Corporate debt securities
Assets:
Investments	1,006	1,434
Fair value, measurements, recurring basis | Long-Term Investments | Asset-backed securities
Assets:
Investments	1,076	813
Fair value, measurements, recurring basis | Long-Term Investments | Marketable equity securities
Assets:
Investments	361	1,860
Fair value, measurements, recurring basis | Long-Term Investments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Investments	361	1,860
Fair value, measurements, recurring basis | Long-Term Investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government and agency securities
Assets:
Investments	0	0
Fair value, measurements, recurring basis | Long-Term Investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign government and agency securities
Assets:
Investments	0	0
Fair value, measurements, recurring basis | Long-Term Investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities
Assets:
Investments	0	0
Fair value, measurements, recurring basis | Long-Term Investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities
Assets:
Investments	0	0
Fair value, measurements, recurring basis | Long-Term Investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Marketable equity securities
Assets:
Investments	361	1,860
Fair value, measurements, recurring basis | Long-Term Investments | Significant Other Observable Inputs (Level 2)
Assets:
Investments	2,912	3,545
Fair value, measurements, recurring basis | Long-Term Investments | Significant Other Observable Inputs (Level 2) | U.S. government and agency securities
Assets:
Investments	454	562
Fair value, measurements, recurring basis | Long-Term Investments | Significant Other Observable Inputs (Level 2) | Foreign government and agency securities
Assets:
Investments	376	736
Fair value, measurements, recurring basis | Long-Term Investments | Significant Other Observable Inputs (Level 2) | Corporate debt securities
Assets:
Investments	1,006	1,434
Fair value, measurements, recurring basis | Long-Term Investments | Significant Other Observable Inputs (Level 2) | Asset-backed securities
Assets:
Investments	1,076	813
Fair value, measurements, recurring basis | Long-Term Investments | Significant Other Observable Inputs (Level 2) | Marketable equity securities
Assets:
Investments	$ 0	$ 0