Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Intangible assets with indefinite lives:
Indefinite-Lived Intangible Assets	$ 9,228	$ 11,283
Total intangible assets - net	48,637	53,228
Trademarks
Intangible assets with indefinite lives:
Indefinite-Lived Intangible Assets	7,002	7,082
Purchased In-Process Research And Development
Intangible assets with indefinite lives:
Indefinite-Lived Intangible Assets	2,226	4,201
Patents And Trademarks
Intangible assets with definite lives:
Finite-Lived Intangible Assets, Gross	35,478	36,427
Less accumulated amortization	9,077	7,223
Finite-Lived Intangible Assets, Net	26,401	29,204
Customer relationships and other intangible assets
Intangible assets with definite lives:
Finite-Lived Intangible Assets, Gross	21,176	20,204
Less accumulated amortization	8,168	7,463
Finite-Lived Intangible Assets, Net	13,008	$ 12,741
Alios Biopharma Inc and XO1 Limited | Purchased In-Process Research And Development
Intangible assets with indefinite lives:
Indefinite-Lived Intangible Assets	1,100
Impairment charge	800
XO1 | Purchased In-Process Research And Development
Intangible assets with indefinite lives:
Impairment charge	$ 300