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Equity Level 4 Dividends from Insurance Subsidiaries (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Class of Stock [Line Items] |  |  |  |
Percent Available for Dividend Distribution without Prior Approval from Regulatory Agency |  | 10.00% |  |
Restrictions on Parent Company's Ability to Pay Dividends |  | no |  |
Payments of Ordinary Dividends, Common Stock |  | $ 316 | $ 282 | $ 202
Restricted net assets |  | 19,000 |  |
Property and Casualty Insurance Subsidiaries [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency |  | 900 |  |
Hartford Life Inc [Domain] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency |  | 1,100 |  |
Property and Casualty Insurance Subsidiaries [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency |  | $ 200 |  |
Scenario, Forecast [Member] | Subsidiaries [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval | $ 165 |  |  |
Scenario, Forecast [Member] | Property and Casualty Insurance Subsidiaries [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency | 800 |  |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval | 1,600 |  |  |
Scenario, Forecast [Member] | Hartford Life Insurance Company [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency | 250 |  |  |
Scenario, Forecast [Member] | Hartford Life and Accident Insurance Company [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Payments of Ordinary Dividends, Common Stock | 240 |  |  |
Subsequent Event [Member] | Subsidiaries [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency | $ 500 |  |  |

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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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