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Goodwill and intangible assets (Tables)
 12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of goodwill
The changes in the carrying amounts of goodwill were as follows (in millions):
 
Years ended December 31,
 
2018
 
2017
Beginning balance
$
14,761

 
$
14,751

Addition from K-A acquisition
6

 
—

Currency translation adjustments
(68
)
 
10

Ending balance
$
14,699

 
$
14,761
Schedule of identifiable intangible assets
Other intangible assets consisted of the following (in millions):
 
December 31,
 
2018
 
2017
 
Gross
carrying
amounts
 
Accumulated
amortization
 
Other intangible
assets, net
 
Gross
carrying
amounts
 
Accumulated
amortization
 
Other intangible
assets, net
Finite-lived intangible assets:
 
 
 
 
 
 
 
 
 
 
 
Developed-product-technology rights
$
12,573

 
$
(7,479
)
 
$
5,094

 
$
12,589

 
$
(6,796
)
 
$
5,793

Licensing rights
3,772

 
(2,032
)
 
1,740

 
3,275

 
(1,601
)
 
1,674

Marketing-related rights
1,297

 
(1,019
)
 
278

 
1,319

 
(920
)
 
399

R&D technology rights
1,148

 
(872
)
 
276

 
1,161

 
(804
)
 
357

Total finite-lived intangible assets
18,790

 
(11,402
)
 
7,388

 
18,344

 
(10,121
)
 
8,223

Indefinite-lived intangible assets:
 
 
 
 
 
 
 
 
 
 
 
IPR&D
55

 
—

 
55

 
386

 
—

 
386

Total other intangible assets
$
18,845

 
$
(11,402
)
 
$
7,443

 
$
18,730

 
$
(10,121
)
 
$
8,609