Restructuring - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					12 Months Ended				27 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2013 employee	Jun. 30, 2013	Sep. 30, 2012 employees	Jun. 30, 2012 employees	Dec. 31, 2009	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 employee	Mar. 31, 2012 BioReliance and Research Organics [Member]	Dec. 31, 2013 Reduction of Value of Assets Impacted by Restructuring [Member]	Dec. 31, 2013 Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Exit activities, estimated number of employees impacted	90		130	30						240
Total expected restructuring costs						$ 12	$ 0			$ 41		$ 9	$ 3
Restructuring costs recognized during period					9	10	9	8	24
Licensing dispute settlement		7				7	0	0
Costs related to mergers and acquisitions		$ 5				$ 5	$ 5	$ 0			$ 5