Significant Accounting Policies - Summary of Reclassification Adjustments Made Between Operating Expenses (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of Sales (formerly Cost of revenue)		$ 131		$ 119		$ 78
Marketing (formerly Selling and marketing)		729	[1]	705	[1]	576
Personnel (including SBC of $96 & $88)		595		570		503
Technology (formerly Technology and content)		91	[1]	80	[1]	63
General and administrative		91		79		74
Depreciation and amortization		85		87		97
Restructuring and other related reorganization costs		21		22		0
Total costs and expenses		$ 1,743		1,662		1,391
As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of Sales (formerly Cost of revenue)				149		116
Marketing (formerly Selling and marketing)				940		784
Personnel (including SBC of $96 & $88)				0		0
Technology (formerly Technology and content)				273		222
General and administrative				191		172
Depreciation and amortization				87		97
Restructuring and other related reorganization costs				22		0
Total costs and expenses				1,662		1,391
Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of Sales (formerly Cost of revenue)	[2]			(30)		(38)
Marketing (formerly Selling and marketing)	[3]			(235)		(208)
Personnel (including SBC of $96 & $88)	[4]			570		503
Technology (formerly Technology and content)	[5]			(193)		(159)
General and administrative	[6]			(112)		(98)
Depreciation and amortization				0		0
Restructuring and other related reorganization costs				0		0
Total costs and expenses				0		0
As Adjusted [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of Sales (formerly Cost of revenue)				119		78
Marketing (formerly Selling and marketing)				705		576
Personnel (including SBC of $96 & $88)				570		503
Technology (formerly Technology and content)				80		63
General and administrative				79		74
Depreciation and amortization				87		97
Restructuring and other related reorganization costs				22		0
Total costs and expenses				$ 1,662		$ 1,391

[1] The significant segment expense categories and amounts align with the segment-level information that is regularly provided to our CODM.

[2] Primarily related to the reclass of people costs to Personnel, and data center costs, and to a lesser extent, licensing costs to Technology; partially offset by the reclass of digital service taxes ("DST") and bad debt expense from General and administrative to Costs of sales

[3] Primarily related to the reclass of people costs to Personnel, and to a lesser extent, licensing costs to Technology and real estate and office expenses to General and administrative.

[4] Related to the reclass of people costs, including stock-based compensation expense, from all legacy operating expense captions to Personnel.

[5] Primarily related to the reclass of people costs to Personnel, and to a lesser extent, the reclass of real estate and office expenses to General and administrative; partially offset by the reclass of data center and licensing costs from all legacy operating expense captions to Technology.

[6] Primarily related to the reclass of people costs to Personnel, and to a lesser extent, the reclass of DST and bad debt expense to Costs of sales; partially offset by the reclass of real estate and office expenses to General and administrative from all legacy operating expense captions