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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)