Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 363	$ 385
Accumulated Amortization	(206)	(216)
Net Carrying Amount	157	169
Core deposit intangibles
Finite-Lived Intangible Assets
Gross Carrying Amount	209	229
Accumulated Amortization	(169)	(182)
Net Carrying Amount	40	47
Developed technology
Finite-Lived Intangible Assets
Gross Carrying Amount	106	106
Accumulated Amortization	(20)	(17)
Net Carrying Amount	86	89
Customer relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	30	30
Accumulated Amortization	(8)	(7)
Net Carrying Amount	22	23
Other
Finite-Lived Intangible Assets
Gross Carrying Amount	18	20
Accumulated Amortization	(9)	(10)
Net Carrying Amount	$ 9	$ 10