Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2012	Feb. 11, 2013	Jun. 30, 2012
Entity [Domain]
Registrant name	TRAVELERS COMPANIES, INC.
Central index key	0000086312
Document type	10-K
Document period end date	Dec. 31, 2012
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			$ 24,560,884,330
Common stock shares outstanding		377,954,687
Document fiscal year focus	2012
Document fiscal period focus	FY