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Goodwill Level 1 (Notes)	12 Months Ended
	Dec. 31, 2016
Goodwill, Impaired [Abstract]
Goodwill	The annual goodwill assessment for The Hartford's reporting units was completed as of October 31, 2016, 2015, and 2014, which resulted in no write-downs of goodwill in the respective years then ended. In 2016, all reporting units passed the first step of their annual impairment test with a significant margin.

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