XML 69 R38.htm IDEA: XBRL DOCUMENT v2.4.1.9
ASSETS HELD FOR SALE (Details) (Scenario, Forecast [Member], Quintiles [Member])
Sep. 30, 2015
Scenario, Forecast [Member] | Quintiles [Member]
 
Long Lived Assets Held-for-sale [Line Items]  
Noncontrolling interest, ownership percentage 40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= dgx_QuintilesMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember