Acquisitions and Divestitures (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	3 Months Ended		12 Months Ended
		Jul. 31, 2018	Sep. 30, 2018	Dec. 31, 2020	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018		Jun. 30, 2020
Business Acquisition [Line Items]
Business acquisition, name of acquired entity					Abaxis, Inc. (Abaxis), a California corporation and a leader in the development, manufacture and marketing of diagnostic instruments for veterinary point-of-care services
Proceeds from Sale of Property, Plant, and Equipment						$ 21	$ 21		$ 56
Gain (Loss) on Disposition of Assets						$ 19	20	[1]	$ 40	[1]
Abaxis Inc
Business Acquisition [Line Items]
Share price of acquisition (in dollars per share)		$ 83.00
Cash and cash equivalents		$ 64
Short term investments		107
Accounts receivable		30
Inventories		79
Other current assets		6
Property, plant and equipment		54
Identifiable intangible assets		894
Other noncurrent assets		29
Accounts payable		(21)
Accrued compensation and related items		(10)
Other current liabilities		(22)
Other noncurrent liabilities		(11)
Noncurrent deferred tax liabilities		(214)
Total net assets acquired		985
Goodwill		977
Total consideration		1,962
Cash paid to shareholders		1,898
Agribusiness Products
Business Acquisition [Line Items]
Amount to be received under agreement	[2]		$ 47
Gain (Loss) on Disposition of Assets	[2]			$ 42			$ 42
Measurement period adjustment [Member] | Abaxis Inc
Business Acquisition [Line Items]
Property, plant and equipment		5
Identifiable intangible assets		3									$ 1
Other current liabilities		(4)
Goodwill		$ 6

[1] For 2018, represents a gain on the divestiture of certain agribusiness products within our International segment, and a net loss related to sales of certain manufacturing sites and products as part of our supply network strategy initiative.     

[2] Includes adjustments for foreign currency translation.