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