Revenue - Revenue by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue from External Customer [Line Items]
Revenues	$ 1,674	$ 1,584	$ 1,547	$ 1,455	$ 1,564	$ 1,480	$ 1,415	$ 1,366	$ 6,260	$ 5,825	$ 5,307
Contract Manufacturing and Human Health Diagnostics [Member]
Revenue from External Customer [Line Items]
Revenues									85	58	44
United States
Revenue from External Customer [Line Items]
Revenues									3,203	2,877	2,620
AUSTRALIA
Revenue from External Customer [Line Items]
Revenues									196	189	176
BRAZIL
Revenue from External Customer [Line Items]
Revenues									293	295	300
CANADA
Revenue from External Customer [Line Items]
Revenues									206	203	184
CHINA
Revenue from External Customer [Line Items]
Revenues									200	211	174
FRANCE
Revenue from External Customer [Line Items]
Revenues									117	130	121
GERMANY
Revenue from External Customer [Line Items]
Revenues									153	147	137
ITALY
Revenue from External Customer [Line Items]
Revenues									112	104	89
JAPAN
Revenue from External Customer [Line Items]
Revenues									158	149	138
MEXICO
Revenue from External Customer [Line Items]
Revenues									117	100	86
SPAIN
Revenue from External Customer [Line Items]
Revenues									114	110	93
UNITED KINGDOM
Revenue from External Customer [Line Items]
Revenues									198	181	149
Other developed markets
Revenue from External Customer [Line Items]
Revenues									370	361	339
Other emerging markets
Revenue from External Customer [Line Items]
Revenues									738	710	657
Total Geographical Area
Revenue from External Customer [Line Items]
Revenues									$ 6,175	$ 5,767	$ 5,263