Goodwill and Other Intangibles (Amortized Intangible Assets) (Details) - USD ($) $ in Millions |
Sep. 30, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Cost | $ 5,000 | $ 4,728 |
| Accumulated Amortization | 2,280 | 2,098 |
| Net Carrying Amount | 2,720 | 2,630 |
| Client relationships | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Cost | 4,614 | 4,337 |
| Accumulated Amortization | 1,937 | 1,761 |
| Net Carrying Amount | 2,677 | 2,576 |
| Other | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Cost | 386 | 391 |
| Accumulated Amortization | 343 | 337 |
| Net Carrying Amount | $ 43 | $ 54 |
| X | ||||||||||
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|