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Acquisitions (Finite-lived and indefinite-lived intangible assets acquired) (Details) - USD ($) $ in Millions | Jul. 01, 2023 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets not subject to amortization |  | $ 3,508 | $ 2,982
Intangible Assets, Net (Excluding Goodwill) |  | $ 6,775 | $ 5,441
Huatai Group [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible Assets, Net (Excluding Goodwill) | $ 1,655 |  |
Huatai Group [Member] | Trademarks |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets not subject to amortization | 398 |  |
Huatai Group [Member] | Asset management mutual funds |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets not subject to amortization | 122 |  |
Huatai Group [Member] | Distribution Rights [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Assets Acquired | $ 332 |  |
Finite-Lived Intangible Asset, Useful Life | 20 years |  |
Huatai Group [Member] | Asset management mutual funds |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Assets Acquired | $ 94 |  |
Finite-Lived Intangible Asset, Useful Life | 16 years |  |
Huatai Group [Member] | Unearned Premium Reserves Intangible Asset |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Assets Acquired | $ 95 |  |
Finite-Lived Intangible Asset, Useful Life | 3 years |  |
Huatai Group [Member] | Use Rights [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Assets Acquired | $ 569 |  |
Finite-Lived Intangible Asset, Useful Life | 31 years |  |
Huatai Group [Member] | Technology-Based Intangible Assets [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Assets Acquired | $ 45 |  |
Finite-Lived Intangible Asset, Useful Life | 6 years |  |

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