Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 15, 2019
Document and Entity Information
Registrant name	Travelers Companies, Inc.
Central index key	0000086312
Document type	10-Q
Document period end date	Mar. 31, 2019
Amendment flag	false
Current fiscal year end date	--12-31
Filer category	Large Accelerated Filer
Entity emerging growth company	false
Entity small business	false
Common stock shares outstanding		261,908,210
Document fiscal year focus	2019
Document fiscal period focus	Q1