REVENUE REVENUE (Tables)

12 Months Ended

Dec. 31, 2018

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue [Table Text Block]

The following table summarizes the disaggregation of revenue by nature:

	Year Ended December 31,
Dollars in Millions	2018		2017		2016
Net product sales	$	21,581	$	19,258	$	17,702
Alliance revenues	647		962		1,252
Other revenues	333		556		473
Total Revenues	$	22,561	$	20,776	$	19,427

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	2018		2017		2016
McKesson Corporation	25	%	24	%	22	%
AmerisourceBergen Corporation	20	%	18	%	18	%
Cardinal Health, Inc.	17	%	15	%	14	%

Reconciliation of Gross Product Sales to Net Product Sales [Table Text Block]

The following table summarizes GTN adjustments:

	Year Ended December 31,
Dollars in Millions	2018			2017			2016
Gross product sales	$	30,174		$	25,499		$	22,364
GTN adjustments(a)
Charge-backs and cash discounts	(2,735		)	(2,084		)	(1,582		)
Medicaid and Medicare rebates	(3,225		)	(2,086		)	(1,382		)
Other rebates, returns, discounts and adjustments	(2,633		)	(2,071		)	(1,698		)
Total GTN adjustments	(8,593		)	(6,241		)	(4,662		)
Net product sales	$	21,581		$	19,258		$	17,702

(a) Includes adjustments for provisions for product sales made in prior periods resulting from changes in estimates of $96 million, $71 million and $155 million for the years ended December 31, 2018, 2017 and 2016, respectively.

Revenue from External Customers by Products and Services [Table Text Block]

The following table summarizes the disaggregation of revenue by product and region:

	Year Ended December 31,
Dollars in Millions	2018		2017		2016
Prioritized Brands
Opdivo	$	6,735	$	4,948	$	3,774
Eliquis	6,438		4,872		3,343
Orencia	2,710		2,479		2,265
Sprycel	2,000		2,005		1,824
Yervoy	1,330		1,244		1,053
Empliciti	247		231		150
Established Brands
Baraclude	744		1,052		1,192
Reyataz Franchise	427		698		912
Sustiva Franchise	283		729		1,065
Hepatitis C Franchise	17		406		1,578
Other Brands	1,630		2,112		2,271
Total Revenues	$	22,561	$	20,776	$	19,427
United States	$	12,586	$	11,358	$	10,720
Europe	5,658		4,988		4,215
Rest of World	3,733		3,877		3,964
Other(a)	584		553		528
Total Revenues	$	22,561	$	20,776	$	19,427

(a) Other revenues included royalties and alliance-related revenues for products not sold by our regional commercial organizations.

Contract with Customer, Asset and Liability [Table Text Block]

The following table summarizes contract assets as of December 31, 2018 and January 1, 2018:

Dollars in Millions	December 31, 2018		January 1, 2018
Prepaid expenses and other	$	35	$	349
Other assets	19		32
Total Contract Assets	$	54	$	381