Segment Information

12 Months Ended

Dec. 31, 2019

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. Our Chief Executive Officer (CEO), as the chief operating decision-maker, manages and allocates resources to the operations of our company on an entity-wide basis. Managing and allocating resources on an entity-wide basis enables our CEO to assess the overall level of resources available and how to best deploy these resources across functions and R&D projects based on unmet medical need and, as necessary, reallocate resources among our internal R&D portfolio and external opportunities to best support the long-term growth of our business. 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,
	2019		2018		2017
AmerisourceBergen Corp.	21	%	20	%	20	%
Cardinal Health, Inc.	21	%	21	%	19	%
McKesson Corp.	22	%	21	%	23	%

Long-Lived Assets

The net book value of our property, plant and equipment (less office and computer equipment) in the United States was $3.5 billion as of December 31, 2019, $3.2 billion as of December 31, 2018 and $2.6 billion as of December 31, 2017. The corresponding amount in international locations was $791 million as of December 31, 2019, $620 million as of December 31, 2018 and $520 million as of December 31, 2017. All individual international locations accounted for less than 10% of the total balances.