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Equity - Dividend Restrictions, Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Class of Stock [Line Items] |  |
Percent of insurer's policyholder surplus available for dividends |  | 10.00%
Dividends received, net |  | $ 3,100
P&C Subsidiaries |  |
Class of Stock [Line Items] |  |
Dividends received |  | 2,400
Extraordinary dividends received |  | 1,400
Dividends received, subsequently contributed to subsidiary |  | 100
Dividends received, subsequently used to pay debt |  | 63
Dividends received, net |  | 1,500
P&C Subsidiaries | Scenario, Forecast |  |
Class of Stock [Line Items] |  |
Dividends received, net | $ 350 |
Maximum dividends permitted to be paid | 1,400 |
HLIC |  |
Class of Stock [Line Items] |  |
Extraordinary dividends received |  | 800
Dividends received, net |  | 1,400
HLI | Scenario, Forecast |  |
Class of Stock [Line Items] |  |
Dividends received | $ 300 |
Hartford Life and Annuity Insurance Company |  |
Class of Stock [Line Items] |  |
Extraordinary dividends received |  | 550
HLA |  |
Class of Stock [Line Items] |  |
Dividends received, net |  | 188
Mutual Funds |  |
Class of Stock [Line Items] |  |
Dividends received, net |  | $ 75

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