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Equity Level 4 Dividends from Insurance Subsidiaries (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Feb. 22, 2017
Class of Stock [Line Items] |  |  |
Percent Available for Dividend Distribution without Prior Approval from Regulatory Agency |  | 10.00% |
Dividend Payment Restrictions Schedule, Description |  | There are no current restrictions on the HFSG Holding Company's ability to pay dividends to its shareholders. |
Restricted net assets |  | $ 16,000 |
Hartford Life Inc [Domain] |  |  |
Class of Stock [Line Items] |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency |  | 1,000 |
Scenario, Forecast [Member] | Property and Casualty Insurance Subsidiaries [Member] |  |  |
Class of Stock [Line Items] |  |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval |  |  | $ 1,500
Scenario, Forecast [Member] | Hartford Life and Accident Insurance Company [Member] |  |  |
Class of Stock [Line Items] |  |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval |  |  | 207
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval |  |  | 250
Scenario, Forecast [Member] | Hartford Life Insurance Company [Member] |  |  |
Class of Stock [Line Items] |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency | $ 300 |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval |  |  | 1,000
Subsequent Event [Member] | Hartford Life Insurance Company [Member] | Subsidiaries [Member] |  |  |
Class of Stock [Line Items] |  |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval |  |  | 300
Consolidated Property and Casualty Insurance Entity [Member] |  |  |
Class of Stock [Line Items] |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency |  | 440 |
Consolidated Property and Casualty Insurance Entity [Member] | Subsidiaries [Member] |  |  |
Class of Stock [Line Items] |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency |  | $ 1,200 |
Consolidated Property and Casualty Insurance Entity [Member] | Scenario, Forecast [Member] |  |  |
Class of Stock [Line Items] |  |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval |  |  | $ 850

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- Definition Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e)(3)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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