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Acquisitions - Narrative (Details) $ in Millions |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 09, 2024 USD ($) | Mar. 31, 2024 USD ($) acquisition | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Total outflow in the Condensed Consolidated Statements of Cash Flows |  | $ 2,206 | $ 155 |  |
Goodwill |  | 10,125 | 9,308 | $ 9,158 | $ 9,199
Business acquisition, goodwill, expected tax deductible amount |  | $ 980 |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  | 8 years |  |  |
Acquisition-related costs |  | $ 20 | 2 |  |
Other acquisitions |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Total consideration |  | $ 102 |  |  |
Number of businesses acquired | acquisition |  | 8 |  |  |
Total outflow in the Condensed Consolidated Statements of Cash Flows |  | $ 100 |  |  |
Intangible assets, net |  | 18 |  |  |
Goodwill |  | 56 |  |  |
Acquisition-related costs |  | 0 | 2 |  |
Hunter |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Total consideration | $ 2,106 | 2,106 |  |  |
Total outflow in the Condensed Consolidated Statements of Cash Flows |  | 2,106 |  |  |
Intangible assets, net |  | 2 |  |  |
Goodwill |  | 969 |  |  |
Acquisition-related costs |  | $ 20 | $ 0 |  |

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