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Goodwill and Other Intangibles (Amortized Intangible Assets) (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Cost | $ 4,466 | $ 4,353
Accumulated Amortization | 1,958 | 1,816
Net Carrying Amount | 2,508 | 2,537
Client relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Cost | 4,096 | 3,993
Accumulated Amortization | 1,631 | 1,508
Net Carrying Amount | 2,465 | 2,485
Other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Cost | 370 | 360
Accumulated Amortization | 327 | 308
Net Carrying Amount | $ 43 | $ 52

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