Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Jul. 17, 2017
Document and Entity Information
Registrant name	Travelers Companies, Inc.
Central index key	0000086312
Document type	10-Q
Document period end date	Jun. 30, 2017
Amendment flag	false
Current fiscal year end date	--12-31
Well-known seasoned issuer	Yes
Voluntary filers	No
Current reporting status	Yes
Filer category	Large Accelerated Filer
Common stock shares outstanding		275,947,036
Document fiscal year focus	2017
Document fiscal period focus	Q2