CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 111	$ 144
Other comprehensive income (loss):
Currency translation	(1)	(4)
Net deferred loss on cash flow hedges, net of tax	(2)	0
Other comprehensive loss	(3)	(4)
Comprehensive income	108	140
Less: Comprehensive income attributable to noncontrolling interests	7	8
Comprehensive income attributable to Quest Diagnostics	$ 101	$ 132