Intangible Assets and Goodwill - Schedule of Acquired Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 77	$ 113
Accumulated Amortization	(43)	(61)
Net Carrying Value	34	52
Listing relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	35	43
Accumulated Amortization	(13)	(16)
Net Carrying Value	22	27
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33	33
Accumulated Amortization	(25)	(18)
Net Carrying Value	8	15
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	0	23
Accumulated Amortization	0	(21)
Net Carrying Value	0	2
Customer contacts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	0	4
Accumulated Amortization	0	(4)
Net Carrying Value	0	0
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9	10
Accumulated Amortization	(5)	(2)
Net Carrying Value	$ 4	$ 8