Insurance Liabilities - Schedule of policyholder contract deposits (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Jan. 01, 2021
Liability for Future Policy Benefit, by Product Segment [Line Items]
Policyholder contract deposits	$ 161,979	$ 155,984	$ 148,223

Amount of liability due to policyholder for deposit held under long-duration contract issued by insurance entity.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 25
-Paragraph 14
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479250/944-40-25-14

Name:	us-gaap_PolicyholderContractDeposits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant