Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Intangible Assets:
Gross Carrying Amount	$ 692	$ 593
Accumulated Amortization	(577)	(585)
Net Carrying Amount	115	8
Customer lists and user base
Intangible Assets:
Gross Carrying Amount	190	203
Accumulated Amortization	(190)	(203)
Net Carrying Amount	$ 0	$ 0
Weighted Average Useful Life (Years)	0 years	0 years
Marketing related
Intangible Assets:
Gross Carrying Amount	$ 68	$ 57
Accumulated Amortization	(53)	(52)
Net Carrying Amount	$ 15	$ 5
Weighted Average Useful Life (Years)	7 years	3 years
Developed technologies
Intangible Assets:
Gross Carrying Amount	$ 275	$ 174
Accumulated Amortization	(177)	(174)
Net Carrying Amount	$ 98	$ 0
Weighted Average Useful Life (Years)	5 years	0 years
All other
Intangible Assets:
Gross Carrying Amount	$ 159	$ 159
Accumulated Amortization	(157)	(156)
Net Carrying Amount	$ 2	$ 3
Weighted Average Useful Life (Years)	3 years	3 years