|
Document and Entity Information (USD $)
|
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2014
|
Mar. 09, 2015
|
|
| Document And Entity Information [Abstract] | ||
| Document Type | 10-K | |
| Amendment Flag | false | |
| Document Period End Date | Dec. 31, 2014 | |
| Document Fiscal Year Focus | 2014 | |
| Document Fiscal Period Focus | FY | |
| Entity Registrant Name | Trinseo S.A. | |
| Entity Central Index Key | 0001519061 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Well-known Seasoned Issuer | No | |
| Entity Current Reporting Status | Yes | |
| Entity Voluntary Filers | No | |
| Entity Filer Category | Non-accelerated Filer | |
| Entity Common Stock, Shares Outstanding | 48,769,567 | |
| Entity Public Float | $ 210,382,750 |