Goodwill and intangible assets (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Finite-lived intangible assets:
Gross carrying amount	$ 15,197	$ 6,443
Accumulated amortization	(4,575)	(3,934)
Intangible assets, net	10,622	2,509
Indefinite-lived intangible assets:
Identifiable intangible assets	17,837	7,902
Accumulated amortization	(4,575)	(3,934)
Identifiable intangible assets, net	13,262	3,968
IPR&D [Member]
Indefinite-lived intangible assets:
Indefinite-lived intangible assets	2,640	1,459
Developed Product Technology Rights [Member]
Finite-lived intangible assets:
Gross carrying amount	10,130	4,220
Accumulated amortization	(3,347)	(2,942)
Intangible assets, net	6,783	1,278
Licensing Rights [Member]
Finite-lived intangible assets:
Gross carrying amount	3,241	445
Accumulated amortization	(366)	(268)
Intangible assets, net	2,875	177
R&D Technology Rights [Member]
Finite-lived intangible assets:
Gross carrying amount	1,207	1,130
Accumulated amortization	(496)	(411)
Intangible assets, net	711	719
Marketing-related Rights [Member]
Finite-lived intangible assets:
Gross carrying amount	619	648
Accumulated amortization	(366)	(313)
Intangible assets, net	$ 253	$ 335