Basis of Presentation (Policies)	9 Months Ended
Sep. 30, 2020
Basis of Presentation
Basis of Presentation	The unaudited interim condensed consolidated financial statements of Trinseo S.A. and its subsidiaries (the “Company”) as of and for the periods ended September 30, 2020 and 2019 were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and reflect all adjustments, consisting only of normal recurring adjustments, which, in the opinion of management, are considered necessary for the fair statement of the results for the periods presented. Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures normally provided in annual financial statements, and therefore, these statements should be read in conjunction with the 2019 audited consolidated financial statements included within the Company’s Annual Report on Form 10-K (“Annual Report”) filed with the Securities and Exchange Commission (“SEC”) on February 28, 2020. The effects of the COVID-19 pandemic negatively impacted the Company’s results of operations, cash flows and financial position during 2020. It is possible that these negative effects could continue, the significance of which is dependent on numerous factors that are uncertain, including the duration and scope of the COVID-19 pandemic. The Company’s condensed consolidated financial statements presented herein reflect the latest estimates and assumptions made by management that affect the reported amounts and related disclosures as of and for the period ended September 30, 2020. However, actual results could differ from these estimates and assumptions. The December 31, 2019 condensed consolidated balance sheet data presented herein was derived from the Company’s December 31, 2019 audited consolidated financial statements, but does not include all disclosures required by GAAP for annual periods.

Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2020

The unaudited interim condensed consolidated financial statements of Trinseo S.A. and its subsidiaries (the “Company”) as of and for the periods ended September 30, 2020 and 2019 were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and reflect all adjustments, consisting only of normal recurring adjustments, which, in the opinion of management, are considered necessary for the fair statement of the results for the periods presented. Because they cover interim periods, the statements and related notes to the financial statements do not include all disclosures normally provided in annual financial statements, and therefore, these statements should be read in conjunction with the 2019 audited consolidated financial statements included within the Company’s Annual Report on Form 10-K (“Annual Report”) filed with the Securities and Exchange Commission (“SEC”) on February 28, 2020. The effects of the COVID-19 pandemic negatively impacted the Company’s results of operations, cash flows and financial position during 2020. It is possible that these negative effects could continue, the significance of which is dependent on numerous factors that are uncertain, including the duration and scope of the COVID-19 pandemic. The Company’s condensed consolidated financial statements presented herein reflect the latest estimates and assumptions made by management that affect the reported amounts and related disclosures as of and for the period ended September 30, 2020. However, actual results could differ from these estimates and assumptions.

The December 31, 2019 condensed consolidated balance sheet data presented herein was derived from the Company’s December 31, 2019 audited consolidated financial statements, but does not include all disclosures required by GAAP for annual periods.