Statutory Financial Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statutory Accounting Practices [Line Items]
Dividends available to be paid	$ 8,500
Minimum statutory capital and surplus required to satisfy regulatory requirements	44,400	$ 41,000
Approximate increase in statutory capital and surplus resulting from discount of certain A&E liabilities	108	115
Statutory Accounting Practices, Permitted Practice, Amount	72	71
PropertyAndCasualtySubsidiaries [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	48,253	45,271
Statutory net income	11,118	8,699	$ 4,028
LifeSubsidiaries [Member] [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	8,970	7,278
Statutory net income	$ 548	$ 459	$ 1,425