    <SEC-DOCUMENT>0001104659-25-107750-index.html : 20251106
    <SEC-HEADER>0001104659-25-107750.hdr.sgml : 20251106
    <ACCEPTANCE-DATETIME>20251106161858
    ACCESSION NUMBER:		0001104659-25-107750
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		30
    CONFORMED PERIOD OF REPORT:	20251106
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20251106
    DATE AS OF CHANGE:		20251106

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Trinseo PLC
    		CENTRAL INDEX KEY:			0001519061
    		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS, MATERIALS, SYNTH RESINS & NONVULCAN ELASTOMERS [2821]
    		ORGANIZATION NAME:           	08 Industrial Applications and Services
    		EIN:				000000000
    		STATE OF INCORPORATION:			L2
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-36473
    		FILM NUMBER:		251458590

    	BUSINESS ADDRESS:
    		STREET 1:		440 EAST SWEDESFORD ROAD
    		STREET 2:		SUITE 301
    		CITY:			WAYNE
    		STATE:			PA
    		ZIP:			19087
    		BUSINESS PHONE:		610-240-3200

    	MAIL ADDRESS:
    		STREET 1:		440 EAST SWEDESFORD ROAD
    		STREET 2:		SUITE 301
    		CITY:			WAYNE
    		STATE:			PA
    		ZIP:			19087

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Trinseo S.A.
    		DATE OF NAME CHANGE:	20110429

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Bain Capital Everest (Luxco 2) S.a r.l.
    		DATE OF NAME CHANGE:	20110426
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>tse-20251106x8k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: tse-20251106x8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>tse-20251106xex99d1.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: tse-20251106xex99d1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>tse-20251106xex99d2.htm
    <DESCRIPTION>EX-99.2
    <TEXT>
    Document 3 - file: tse-20251106xex99d2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>tse-20251106xex99d1001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: tse-20251106xex99d1001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>tse-20251106xex99d2g001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: tse-20251106xex99d2g001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>tse-20251106xex99d2g002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: tse-20251106xex99d2g002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>tse-20251106xex99d2g003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: tse-20251106xex99d2g003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>tse-20251106xex99d2g004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: tse-20251106xex99d2g004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>tse-20251106xex99d2g005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: tse-20251106xex99d2g005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>tse-20251106xex99d2g006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: tse-20251106xex99d2g006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>tse-20251106xex99d2g007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: tse-20251106xex99d2g007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>tse-20251106xex99d2g008.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: tse-20251106xex99d2g008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>tse-20251106xex99d2g009.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: tse-20251106xex99d2g009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>tse-20251106xex99d2g010.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: tse-20251106xex99d2g010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>tse-20251106xex99d2g011.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: tse-20251106xex99d2g011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>tse-20251106xex99d2g012.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: tse-20251106xex99d2g012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>tse-20251106xex99d2g013.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: tse-20251106xex99d2g013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>tse-20251106xex99d2g014.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: tse-20251106xex99d2g014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>tse-20251106xex99d2g015.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: tse-20251106xex99d2g015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>20
    <FILENAME>tse-20251106.xsd
    <DESCRIPTION>EX-101.SCH
    <TEXT>
    Document 20 - file: tse-20251106.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>21
    <FILENAME>tse-20251106_lab.xml
    <DESCRIPTION>EX-101.LAB
    <TEXT>
    Document 21 - file: tse-20251106_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>22
    <FILENAME>tse-20251106_pre.xml
    <DESCRIPTION>EX-101.PRE
    <TEXT>
    Document 22 - file: tse-20251106_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>24
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 24 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>25
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 25 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>26
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 26 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>28
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 28 - file: FilingSummary.html

    Document 28 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>30
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 30 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>31
    <FILENAME>0001104659-25-107750-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 31 - file: 0001104659-25-107750-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>32
    <FILENAME>tse-20251106x8k_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 32 - file: tse-20251106x8k_htm.html

    Document 32 - RAW XML: tse-20251106x8k_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>