    <SEC-DOCUMENT>0000947871-20-000426-index.html : 20200504
    <SEC-HEADER>0000947871-20-000426.hdr.sgml : 20200504
    <ACCEPTANCE-DATETIME>20200504164319
    ACCESSION NUMBER:		0000947871-20-000426
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		19
    CONFORMED PERIOD OF REPORT:	20200504
    ITEM INFORMATION:		Other Events
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20200504
    DATE AS OF CHANGE:		20200504

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			QUEST DIAGNOSTICS INC
    		CENTRAL INDEX KEY:			0001022079
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
    		IRS NUMBER:				161387862
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-12215
    		FILM NUMBER:		20845492

    	BUSINESS ADDRESS:
    		STREET 1:		500 PLAZA DRIVE
    		CITY:			SECAUCUS
    		STATE:			NJ
    		ZIP:			07094
    		BUSINESS PHONE:		9735202700

    	MAIL ADDRESS:
    		STREET 1:		500 PLAZA DRIVE
    		CITY:			SECAUCUS
    		STATE:			NJ
    		ZIP:			07094

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CORNING CLINICAL LABORATORIES INC
    		DATE OF NAME CHANGE:	19960903
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>ss171981_8k.htm
    <DESCRIPTION>CURRENT REPORT
    <TEXT>
    Document 1 - file: ss171981_8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>ss171981_ex9901.htm
    <DESCRIPTION>FOURTH AMENDED AND RESTATED RECEIVABLES SALES AGREEMENT
    <TEXT>
    Document 2 - file: ss171981_ex9901.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>ss171981_ex9902.htm
    <DESCRIPTION>AMENDMENT NO. 1 TO FOURTH AMENDED AND RESTATED RECEIVABLES SALES AGREEMENT
    <TEXT>
    Document 3 - file: ss171981_ex9902.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.3
    <SEQUENCE>4
    <FILENAME>ss171981_ex9903.htm
    <DESCRIPTION>SIXTH AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT
    <TEXT>
    Document 4 - file: ss171981_ex9903.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.4
    <SEQUENCE>5
    <FILENAME>ss171981_ex9904.htm
    <DESCRIPTION>AMENDMENT NO. 1 TO SIXTH AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT
    <TEXT>
    Document 5 - file: ss171981_ex9904.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.5
    <SEQUENCE>6
    <FILENAME>ss171981_ex9905.htm
    <DESCRIPTION>AMENDMENT NO. 2 TO SIXTH AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT
    <TEXT>
    Document 6 - file: ss171981_ex9905.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.6
    <SEQUENCE>7
    <FILENAME>ss171981_ex9906.htm
    <DESCRIPTION>AMENDMENT NO. 3 TO SIXTH AMENDED AND RESTATED CREDIT AND SECURITY AGREEMENT
    <TEXT>
    Document 7 - file: ss171981_ex9906.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.7
    <SEQUENCE>8
    <FILENAME>ss171981_ex9907.htm
    <DESCRIPTION>AMENDMENT AND RESTATEMENT AGREEMENT
    <TEXT>
    Document 8 - file: ss171981_ex9907.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>9
    <FILENAME>dgx-20200504.xsd
    <DESCRIPTION>XBRL SCHEMA FILE
    <TEXT>
    Document 9 - file: dgx-20200504.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>10
    <FILENAME>dgx-20200504_lab.xml
    <DESCRIPTION>XBRL LABEL FILE
    <TEXT>
    Document 10 - file: dgx-20200504_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>11
    <FILENAME>dgx-20200504_pre.xml
    <DESCRIPTION>XBRL PRESENTATION FILE
    <TEXT>
    Document 11 - file: dgx-20200504_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 12 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: FilingSummary.html

    Document 13 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>ss171981_8k_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 14 - file: ss171981_8k_htm.html

    Document 14 - RAW XML: ss171981_8k_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>15
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>16
    <FILENAME>0000947871-20-000426-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 16 - file: 0000947871-20-000426-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>17
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>18
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 18 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>20
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: Financial_Report.xlsx

    </DOCUMENT>
    </SEC-DOCUMENT>