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Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Property, Plant, and Equipment [Line Items]
Total	$ 3,203		$ 3,203		$ 2,721
Less: Accumulated depreciation and amortization	(1,957)		(1,957)		(1,654)
Property and equipment, net	1,246		1,246		1,067
Depreciation expense	50	$ 33	93	$ 67
Depreciation and amortization	295	159	564	311
Equipment for merchants
Property, Plant, and Equipment [Line Items]
Total	245		245		235
Computer equipment and software
Property, Plant, and Equipment [Line Items]
Total	142		142		126
Capitalized software and website development costs
Property, Plant, and Equipment [Line Items]
Total	2,273		2,273		1,895
Property, plant, and equipment, addition	202	136	378	250
Depreciation and amortization	131	$ 94	243	$ 181
Leasehold improvements
Property, Plant, and Equipment [Line Items]
Total	287		287		268
Office and other equipment
Property, Plant, and Equipment [Line Items]
Total	167		167		149
Construction in progress
Property, Plant, and Equipment [Line Items]
Total	$ 89		$ 89		$ 48