Geographical Information - Summary of Revenue by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 134	$ 656	$ 323	$ 1,428
Core Marketplace Revenue
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 54	$ 378	$ 144	$ 855
Core Marketplace Revenue | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	100.00%	100.00%	100.00%	100.00%
Core Marketplace Revenue | Europe
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 18	$ 178	$ 52	$ 413
Core Marketplace Revenue | Europe | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	33.00%	47.00%	36.00%	48.00%
Core Marketplace Revenue | North America
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 28	$ 149	$ 71	$ 335
Core Marketplace Revenue | North America | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	52.00%	39.00%	49.00%	39.00%
Core Marketplace Revenue | South America
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 2	$ 17	$ 5	$ 35
Core Marketplace Revenue | South America | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	4.00%	5.00%	4.00%	4.00%
Core Marketplace Revenue | Other
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 6	$ 34	$ 16	$ 72
Core Marketplace Revenue | Other | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	11.00%	9.00%	11.00%	9.00%