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