    <SEC-DOCUMENT>0000105770-23-000075-index.html : 20231130
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    <ACCEPTANCE-DATETIME>20231130160516
    ACCESSION NUMBER:		0000105770-23-000075
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		22
    CONFORMED PERIOD OF REPORT:	20231127
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20231130
    DATE AS OF CHANGE:		20231130

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			WEST PHARMACEUTICAL SERVICES INC
    		CENTRAL INDEX KEY:			0000105770
    		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
    		IRS NUMBER:				231210010
    		STATE OF INCORPORATION:			PA
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-08036
    		FILM NUMBER:		231455712

    	BUSINESS ADDRESS:
    		STREET 1:		530 HERMAN O. WEST DRIVE
    		CITY:			EXTON
    		STATE:			PA
    		ZIP:			19341
    		BUSINESS PHONE:		6105942900

    	MAIL ADDRESS:
    		STREET 1:		530 HERMAN O. WEST DRIVE
    		CITY:			EXTON
    		STATE:			PA
    		ZIP:			19341

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	WEST CO INC
    		DATE OF NAME CHANGE:	19990405
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>wst-20231127.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: wst-20231127.htm

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    <DOCUMENT>
    <TYPE>EX-10.40
    <SEQUENCE>2
    <FILENAME>exhibit1040exxonamendmen.htm
    <DESCRIPTION>EX-10.40
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    Document 2 - file: exhibit1040exxonamendmen.htm

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    <TYPE>EX-101.SCH
    <SEQUENCE>3
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    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
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    <TYPE>GRAPHIC
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    <FILENAME>exhibit1040exxonamendmen001.jpg
    <DESCRIPTION>GRAPHIC
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    <FILENAME>exhibit1040exxonamendmen006.jpg
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    <FILENAME>exhibit1040exxonamendmen007.jpg
    <DESCRIPTION>GRAPHIC
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    <FILENAME>exhibit1040exxonamendmen008.jpg
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    <TYPE>XML
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    <TYPE>EXCEL
    <SEQUENCE>17
    <FILENAME>Financial_Report.xlsx
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    <TYPE>XML
    <SEQUENCE>18
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    <SEQUENCE>19
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    <TYPE>XML
    <SEQUENCE>20
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    <TYPE>JSON
    <SEQUENCE>22
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