Geographical Information - Summary of Revenue by Geographic Area (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 2,085	$ 2,541	$ 1,901
Core Marketplace Revenue
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 1,177	$ 1,827	$ 1,473
Core Marketplace Revenue | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	100.00%	100.00%	100.00%
Core Marketplace Revenue | Europe
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 542	$ 833	$ 716
Core Marketplace Revenue | Europe | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	46.00%	46.00%	49.00%
Core Marketplace Revenue | North America
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 470	$ 735	$ 566
Core Marketplace Revenue | North America | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	40.00%	40.00%	38.00%
Core Marketplace Revenue | South America
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 50	$ 90	$ 72
Core Marketplace Revenue | South America | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	4.00%	5.00%	5.00%
Core Marketplace Revenue | Other
Entity Wide Revenue Major Customer [Line Items]
Revenue	$ 115	$ 169	$ 119
Core Marketplace Revenue | Other | Revenue | Geographic Concentration Risk
Entity Wide Revenue Major Customer [Line Items]
Revenue percentage	10.00%	9.00%	8.00%