Goodwill and Acquired Intangible Assets - Acquired Intangible Assets (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Intangible Asset, Acquired, Finite-Lived [Line Items] | ||
| Gross Carrying Value | $ 10,148 | $ 10,146 |
| Accumulated Amortization | (2,915) | (2,403) |
| Net Carrying Value | 7,233 | 7,743 |
| Client relationships | ||
| Intangible Asset, Acquired, Finite-Lived [Line Items] | ||
| Gross Carrying Value | 9,819 | 9,819 |
| Accumulated Amortization | (2,679) | (2,171) |
| Net Carrying Value | 7,140 | 7,648 |
| Technology | ||
| Intangible Asset, Acquired, Finite-Lived [Line Items] | ||
| Gross Carrying Value | 216 | 216 |
| Accumulated Amortization | (216) | (212) |
| Net Carrying Value | 0 | 4 |
| Trade names | ||
| Intangible Asset, Acquired, Finite-Lived [Line Items] | ||
| Gross Carrying Value | 113 | 111 |
| Accumulated Amortization | (20) | (20) |
| Net Carrying Value | $ 93 | $ 91 |
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- 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/disclosureRef
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- 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
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- 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
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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