Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2011	Feb. 10, 2012	Jun. 30, 2011
Entity [Domain]
Registrant name	Travelers Companies, Inc.
Central index key	0000086312
Document type	10-K
Document period end date	Dec. 31, 2011
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
Entity public float			$ 24,420,968,874
Common stock shares outstanding		393,072,145
Document fiscal year focus	2011
Document fiscal period focus	FY