Goodwill and Other Intangible Assets - Gross Carrying Amount, Accumulated Amortization and Net Carrying Amount of Other Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,897	$ 3,981
Accumulated Amortization	(2,353)	(2,165)
Net Carrying Amount	1,544	1,816	$ 1,827
Client relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,728	2,786
Accumulated Amortization	(1,626)	(1,497)
Net Carrying Amount	1,102	1,289
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	402	403
Accumulated Amortization	(178)	(142)
Net Carrying Amount	224	261
Core deposits
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	683	696
Accumulated Amortization	(477)	(451)
Net Carrying Amount	206	245
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	84	96
Accumulated Amortization	(72)	(75)
Net Carrying Amount	$ 12	$ 21