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Loans and Merchant Cash Advances - Schedule of MCA, Loans and Related Receivables (Details) - USD ($) $ in Millions	Sep. 30, 2026	Jun. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses related to uncollectible loans and merchant cash advances receivable	$ (246)	$ (242)	$ (195)	$ (177)	$ (169)	$ (141)
Loans and merchant cash advances, net	2,350		1,784
Interest receivable	35		24
Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, gross	2,226		1,621
Merchant cash advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, gross	$ 370		$ 358