Segment Information

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Segment Reporting Disclosure

SEGMENT INFORMATION

We have one operating segment, which primarily focuses on the discovery, development and commercialization of innovative medicines in areas of unmet medical need. Therefore, our results of operations are reported on a consolidated basis consistent with internal management reporting reviewed by our chief operating decision maker, who is our chief executive officer or interim chief executive officer. See Note 2, Revenues, for a summary of disaggregated revenues by product and geographic region.

Revenues From Major Customers

The following table summarizes revenues from each of our customers who individually accounted for 10% or more of our total revenues (as a percentage of total revenues):

	Year Ended December 31,
	2018		2017		2016
AmerisourceBergen Corp.	20	%	20	%	18	%
Cardinal Health, Inc.	21	%	19	%	16	%
McKesson Corp.	21	%	23	%	22	%

Long-Lived Assets

The net book value of our property, plant and equipment (less office and computer equipment) in the United States was $3.2 billion as of December 31, 2018, $2.6 billion as of December 31, 2017 and $2.2 billion as of December 31, 2016. The corresponding amount in international locations was $620 million as of December 31, 2018, $520 million as of December 31, 2017 and $430 million as of December 31, 2016. All individual international locations accounted for less than ten percent of the total balances.