Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Restructuring Benefits and Charges (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Beginning balance		$ 45	[1]	$ 45		$ 41
Provision/(benefit)		8		33		26
Utilization and other	[2]	(32)		(33)		(22)
Ending balance		21	[1]	45	[1]	45
Other current liabilities
Restructuring Reserve [Roll Forward]
Accrued expenses		6		23
Other non-current liabilities
Restructuring Reserve [Roll Forward]
Other noncurrent liabilities		15		22
Employee Severance
Restructuring Reserve [Roll Forward]
Beginning balance		45	[1]	45		41
Provision/(benefit)	[3],[4]	8		33		25
Utilization and other	[2]	(32)		(33)		(21)
Ending balance		21	[1]	45	[1]	45
Exit Costs
Restructuring Reserve [Roll Forward]
Beginning balance		0	[1]	0		0
Provision/(benefit)		0		0		1
Utilization and other	[2]	0		0		(1)
Ending balance		$ 0	[1]	$ 0	[1]	$ 0

[1] At December 31, 2020 and 2019, included in Accrued Expenses ($6 million and $23 million, respectively) and Other noncurrent liabilities ($15 million and $22 million, respectively).

[2] Includes adjustments for foreign currency translation.

[3] The restructuring charges are associated with the following: •For the year ended December 31, 2020, Manufacturing/research/corporate of $8 million. •For the year ended December 31, 2019, International of $2 million, and Manufacturing/research/corporate of $31 million. •For the year ended December 31, 2018, International of $7 million, and Manufacturing/research/corporate of $19 million.

[4] The restructuring charges for the year ended December 31, 2020 are primarily related to CEO transition-related costs and other cost-reduction and productivity initiatives.     The restructuring charges for the year ended December 31, 2019 are primarily related to the acquisition of Abaxis and CEO transition-related costs.     The restructuring charges for the year ended December 31, 2018 are primarily related to: •employee termination costs of $7 million in Europe as a result of initiatives to better align our organizational structure; •employee termination costs of $21 million related to the acquisition of Abaxis; and •a net reversal of employee termination costs of $3 million, and exit costs of $1 million as a result of our operational efficiency initiative and supply network strategy initiative launched in 2015.