Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Definite-lived intangible assets
Gross carrying amount	$ 17,060		$ 17,060		$ 5,643
Accumulated amortization	(4,827)		(4,827)		(4,575)
Net carrying amount	12,233		12,233		1,068
Indefinite-lived research and development	7,589		7,589		445
Net carrying amount - Indefinite-lived research and development	7,589		7,589		445
Total intangible assets gross carrying amount	24,649		24,649		6,088
Accumulated amortization - Total intangible assets	(4,827)		(4,827)		(4,575)
Total intangible assets, net	19,822		19,822		1,513
Amortization of intangible assets	125	$ 98	279	$ 307
Anticipated annual amortization expense
2015	389		389
2016	588		588
2017	666		666
2018	809		809
2019	934		934
Impairment charges			0	$ 0
Developed product rights
Definite-lived intangible assets
Gross carrying amount	9,107		9,107		4,546
Accumulated amortization	(3,875)		(3,875)		(3,706)
Net carrying amount	5,232		5,232		840
License agreements
Definite-lived intangible assets
Gross carrying amount	7,953		7,953		1,097
Accumulated amortization	(952)		(952)		(869)
Net carrying amount	$ 7,001		$ 7,001		$ 228