Goodwill, Other intangible assets, and Value of business acquired (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of purchased intangibles		$ 310	$ 285	$ 287
Present Value of Future Insurance Profit [Line Items]
Amortization of Value of Business Acquired (VOBA)	[1]	$ 281	$ 149	$ 23

[1] Recognized in Policy acquisition costs in the Consolidated statements of operations.