Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 16, 2017
Document and Entity Information
Registrant name	Travelers Companies, Inc.
Central index key	0000086312
Document type	10-Q
Document period end date	Sep. 30, 2017
Amendment flag	false
Current fiscal year end date	--12-31
Filer category	Large Accelerated Filer
Common stock shares outstanding		273,695,876
Document fiscal year focus	2017
Document fiscal period focus	Q3