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Equity Level 4 Statutory Net Income (Loss) and Statutory Surplus (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Feb. 22, 2017
Statutory Accounting Practices [Line Items] |  |  |  |  |
Payments of Ordinary Dividends, Common Stock |  | $ 334 | $ 316 | $ 282 |
Statutory Net Income (Loss) |  |  |  |  |
Statutory Net Income (Loss) |  | 861 | 2,025 | 1,643 |
Statutory surplus |  |  |  |  |
Statutory Capital and surplus |  | $ 14,283 | $ 15,154 |  |
Statutory Accounting Practices, Risk Based Capital Requirements Compliance Assertion |  | All of the Company's operating insurance subsidiaries had RBC ratios in excess of the minimum levels required by the applicable insurance regulations. On an aggregate basis, the Company's U.S. property and casualty insurance companies' RBC ratio was in excess of 200% of its Company Action Level as of December 31, 2016 and 2015. The RBC ratios for the Company's principal life insurance operating subsidiaries were all in excess of 400% of their Company Action Levels as of December 31, 2016 and 2015 | All of the Company's operating insurance subsidiaries had RBC ratios in excess of the minimum levels required by the applicable insurance regulations. On an aggregate basis, the Company's U.S. property and casualty insurance companies' RBC ratio was in excess of 200% of its Company Action Level as of December 31, 2016 and 2015. The RBC ratios for the Company's principal life insurance operating subsidiaries were all in excess of 400% of their Company Action Levels as of December 31, 2015. |  |
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries |  | $ 16,000 |  |  |
U.S. life insurance subsidiaries, includes domestic captive insurance subsidiaries |  |  |  |  |
Statutory Net Income (Loss) |  |  |  |  |
Statutory Net Income (Loss) |  | 557 | $ 539 | 415 |
Statutory surplus |  |  |  |  |
Statutory Capital and surplus |  | 6,022 | 6,591 |  |
Property and casualty insurance subsidiaries |  |  |  |  |
Statutory Net Income (Loss) |  |  |  |  |
Statutory Net Income (Loss) |  | 304 | 1,486 | $ 1,228 |
Statutory surplus |  |  |  |  |
Statutory Capital and surplus |  | $ 8,261 | $ 8,563 |  |
International Life Insurance Subsidiaries [Member] |  |  |  |  |
Statutory surplus |  |  |  |  |
Statutory Accounting Practices, Risk Based Capital Requirements Compliance Assertion |  | All of the Company's international insurance subsidiaries have solvency margins in excess of the minimum levels required by the applicable regulatory authorities. |  |  |
Scenario, Forecast [Member] | Property and casualty insurance subsidiaries |  |  |  |  |
Statutory surplus |  |  |  |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval |  |  |  |  | $ 1,500
Scenario, Forecast [Member] | Hartford Life Insurance Company [Member] |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency | $ 300 |  |  |  |
Statutory surplus |  |  |  |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval |  |  |  |  | 1,000
Scenario, Forecast [Member] | Hartford Life and Accident Insurance Company [Member] |  |  |  |  |
Statutory surplus |  |  |  |  |
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval |  |  |  |  | $ 207

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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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