Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock-based compensation:
Stock-based compensation	$ 96	$ 88	$ 120
Cost of Revenue
Stock-based compensation:
Stock-based compensation	1	1	1
Selling and Marketing
Stock-based compensation:
Stock-based compensation	16	12	16
Technology and Content
Stock-based compensation:
Stock-based compensation	40	36	46
General and Administrative
Stock-based compensation:
Stock-based compensation	$ 39	$ 39	$ 57