CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Cost of revenue
Stock-based compensation	$ 3	$ 6	$ 6	$ 11
Selling and marketing
Stock-based compensation	17	32	32	49
Technology and content
Stock-based compensation	27	32	54	59
General and administrative
Stock-based compensation	$ 46	$ 50	$ 91	$ 84