Statutory Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statutory Accounting Practices [Line Items]
Dividends available to be paid	$ 5,700
Approximate increase in statutory capital and surplus resulting from discount of certain A&E liabilities	120	$ 129
Minimum statutory capital and surplus required to satisfy regulatory requirements	36,900	34,000
Statutory Accounting Practices, Permitted Practice, Amount	79	72
PropertyAndCasualtySubsidiaries [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	40,824	46,662
Statutory net income	4,028	7,983	$ 4,354
LifeSubsidiaries [Member] [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	4,834	2,294
Statutory net income	$ 1,425	$ 424	$ (245)