Restructuring Actions - Roll Forward (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
2020 Restructuring Actions | COVID-19 Pandemic
Restructuring Reserve Roll Forward
Expenses incurred	$ 58
Non-cash changes	(23)
Restructuring actions balances, Ending Balance	35	$ 35
Employee-Related | 2020 Restructuring Actions | COVID-19 Pandemic
Restructuring Reserve Roll Forward
Expenses incurred	35
Restructuring actions balances, Ending Balance	35	35
Employee-Related | 2019 Restructuring Actions
Restructuring Reserve Roll Forward
Restructuring actions balances, Beginning Balance		140
Cash payments		(14)
Adjustments		(23)
Restructuring actions balances, Ending Balance	103	103
Asset-Related | 2020 Restructuring Actions | COVID-19 Pandemic
Restructuring Reserve Roll Forward
Expenses incurred	23
Non-cash changes	(23)
Drug delivery business | 2020 Restructuring Actions
Restructuring Reserve Roll Forward
Expenses incurred	55
Non-cash changes		(11)
Restructuring actions balances, Ending Balance	44	44
Drug delivery business | Employee-Related | 2020 Restructuring Actions
Restructuring Reserve Roll Forward
Expenses incurred	32
Restructuring actions balances, Ending Balance	32	32
Drug delivery business | Asset-Related and Other | 2020 Restructuring Actions
Restructuring Reserve Roll Forward
Expenses incurred	23
Non-cash changes		(11)
Restructuring actions balances, Ending Balance	$ 12	$ 12