v3.19.3.a.u2
Taxes on Earnings from Continuing Operations - Tax Rate Reconciliation (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Differences between the effective income tax rate and the U.S. statutory tax rate:      
Statutory tax rate on earnings from continuing operations (as a percent) 21.00% 21.00% 35.00%
Impact of foreign operations (as a percent) (5.00%) (5.40%) (16.30%)
Impact of TCJA and other related items (as a percent) (2.10%) 6.30% 65.50%
Foreign-derived intangible income benefit (as a percent) (2.00%) (1.90%)  
Domestic impairment loss (as a percent)   (2.10%)  
Excess tax benefits related to stock compensation (as a percent) (2.50%) (3.10%) (5.40%)
Research tax credit (as a percent) (1.20%) (1.80%) (1.90%)
Resolution of certain tax positions pertaining to prior years (as a percent)   3.40%  
State taxes, net of federal benefit (as a percent) 0.80% 0.40% 0.50%
Federal tax cost on sale of Mylan N.V. shares (as a percent)     3.40%
All other, net (as a percent) 0.60% 2.00% 3.40%
Effective tax rate on earnings from continuing operations (as a percent) 9.60% 18.80% 84.20%