Cover
| Cover | Jan. 17, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 17, 2023 |
| Entity File Number | 001-10898 |
| Entity Registrant Name | The Travelers Companies, Inc. |
| Entity Central Index Key | 0000086312 |
| Entity Tax Identification Number | 41-0518860 |
| Entity Incorporation, State or Country Code | MN |
| Entity Address, Address Line One | 485 Lexington Avenue |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10017 |
| City Area Code | 917 |
| Local Phone Number | 778-6000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, without par value |
| Trading Symbol | TRV |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |