Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock-based compensation:
Stock-based compensation	$ 88	$ 120	$ 109
Cost of Revenue
Stock-based compensation:
Stock-based compensation	1	1	1
Selling and Marketing
Stock-based compensation:
Stock-based compensation	12	16	16
Technology and Content
Stock-based compensation:
Stock-based compensation	36	46	44
General and Administrative
Stock-based compensation:
Stock-based compensation	$ 39	$ 57	$ 48