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Acquisitions (Finite-lived and indefinite-lived intangible assets acquired) (Details) - USD ($) $ in Millions	Jul. 01, 2023	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization		$ 3,494	$ 2,982
Total identified intangible assets		$ 6,844	$ 5,441
Huatai Group
Finite-Lived Intangible Assets [Line Items]
Total identified intangible assets	$ 1,655
Huatai Group | Trademarks
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	398
Huatai Group | Asset management mutual funds
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	122
Huatai Group | 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 | 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 | 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 | 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 | 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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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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