Goodwill and Other Intangibles (Amortized Intangible Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 4,099	$ 4,431
Accumulated Amortization	1,696	1,621
Net Carrying Amount	2,403	2,810
Client relationships
Finite-Lived Intangible Assets [Line Items]
Gross Cost	3,759	4,066
Accumulated Amortization	1,407	1,334
Net Carrying Amount	2,352	2,732
Other
Finite-Lived Intangible Assets [Line Items]
Gross Cost	340	365
Accumulated Amortization	289	287
Net Carrying Amount	$ 51	$ 78