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Subsequent Event (Notes)
 3 Months Ended
Mar. 31, 2018
Subsequent Event [Line Items]  
Subsequent Events [Text Block]
16.
SUBSEQUENT EVENT
On April 30, 2018, the Company entered into a definitive agreement under which Eurofins Scientific (EUFI.PA), a global group of laboratories active in food, environment and pharma product testing, will acquire the Covance Food Solutions business for an all-cash purchase price of $670.0.