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Acquisition (Details) $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 02, 2020 | Jan. 31, 2023 USD ($) | Dec. 31, 2024 USD ($) business | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Business Acquisition |  |  |  |  |
Number of businesses acquired | business |  |  | 3 |  |
Purchase of noncontrolling interest |  |  | $ 0 | $ 173 | $ 0
2024 Business Combinations |  |  |  |  |
Business Acquisition |  |  |  |  |
Total cash consideration, net of cash acquired |  |  | 514 |  |
Business combination, recognized identifiable assets acquired and liabilities assumed, goodwill |  |  | 351 |  |
Business combination, recognized Identifiable assets acquired and liabilities assumed, equipment |  |  | 153 |  |
2024 Business Combinations | Customer relationships |  |  |  |  |
Business Acquisition |  |  |  |  |
Business combination, recognized identifiable assets acquired and liabilities assumed, goodwill |  |  | $ 83 |  |
Virtus Acquisition |  |  |  |  |
Business Acquisition |  |  |  |  |
Percentage of equity interests acquired | 70.00% |  |  |  |
Call option exercise period | 2 years |  |  |  |
Put option exercise period | 3 years |  |  |  |
Virtus Acquisition | Virtus Partners |  |  |  |  |
Business Acquisition |  |  |  |  |
Percentage of equity interests acquired |  | 100.00% |  |  |
Noncontrolling interest, ownership percentage by noncontrolling owners | 30.00% |  |  |  |
Purchase of noncontrolling interest |  | $ 173 |  |  |

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