Goodwill and Value of business acquired, and Other Intangible Assets (Other Intangible Assets) (Details)) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets subject to amortization	$ 3,350	$ 2,459
Intangible assets not subject to amortization	3,494	2,982
Other intangible assets	6,844	$ 5,441
Acquired Indefinite-Lived Intangible Assets [Line Items]
2028, Other intangible assets	$ 253