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Equity (Dividend Restrictions) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2024
Parent Company        
Statutory Accounting Practices [Line Items]        
Payments of Dividends $ 266 $ 0 $ 550  
Parent Company | Scenario, Forecast        
Statutory Accounting Practices [Line Items]        
Permitted w/o Approval       $ 0
Brighthouse Life Insurance Co of NY        
Statutory Accounting Practices [Line Items]        
Payments of Dividends $ 0 $ 0 $ 0  
Brighthouse Life Insurance Co of NY | Scenario, Forecast        
Statutory Accounting Practices [Line Items]        
Permitted w/o Approval       $ 81