Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Jul. 31, 2018
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Identifiable intangible assets		$ 894
Finite-lived intangible assets, gross carrying amount		2,648		$ 2,644
Finite-lived intangible assets, accumulated amortization		(966)		(906)
Finite-lived intangible assets, identifiable intangible assets, less accumulated amortization		1,682		1,738
Total indefinite-lived intangible assets		307		308
Intangible Assets, gross carrying amount		2,955		2,952
Identifiable intangible assets, less accumulated amortization		1,989		2,046
Amortization of intangible assets			$ 25
Brands
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets		37		37
Trademarks and Trade Names
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets		67		67
In Process Research and Development
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets		196		197
Product Rights
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets		7		7
Developed Technology Rights
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Identifiable intangible assets		$ 610
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Finite-lived intangible assets, gross carrying amount	[1],[2]	$ 1,856		1,854
Finite-lived intangible assets, accumulated amortization	[1],[2]	(559)		(523)
Finite-lived intangible assets, identifiable intangible assets, less accumulated amortization	[1],[2]	1,297		1,331
Brands
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross carrying amount		213		212
Finite-lived intangible assets, accumulated amortization		(157)		(154)
Finite-lived intangible assets, identifiable intangible assets, less accumulated amortization		56		58
Trademarks and Trade Names
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Identifiable intangible assets		$ 104
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		20 years
Finite-lived intangible assets, gross carrying amount	[2]	$ 166		166
Finite-lived intangible assets, accumulated amortization	[2]	(53)		(51)
Finite-lived intangible assets, identifiable intangible assets, less accumulated amortization	[2]	113		115
Other Intangible Assets
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Identifiable intangible assets		$ 180
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		4 years
Finite-lived intangible assets, gross carrying amount	[2]	$ 413		412
Finite-lived intangible assets, accumulated amortization	[2]	(197)		(178)
Finite-lived intangible assets, identifiable intangible assets, less accumulated amortization	[2]	216		$ 234
Abaxis Inc
Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Identifiable intangible assets	[3]				$ 894
Amortization of intangible assets		$ 33

[1]

[2] In connection with the acquisition of Abaxis in 2018, the company recorded $894 million of intangible assets, as shown in the table below, representing the preliminary fair value at the acquisition date. See Note 5. Acquisitions and Divestitures for additional information.

[3] Identifiable intangible assets primarily consist of developed technology rights, customer relationships, and trademarks and tradenames. The preliminary estimate of fair value of identifiable intangible assets is determined using the income approach, which includes a forecast of expected future cash flows. For additional information regarding identifiable intangible assets, see Note 12. Goodwill and Other Intangible Assets.