Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reconciliation between the U.S. federal statutory tax rate and effective tax rate
Statutory rate	21.00%	21.00%	21.00%	21.00%
State taxes	0.90%	0.60%	0.70%	0.70%
Taxes on foreign earnings	(5.00%)	(0.50%)	(4.70%)	(1.30%)
Credits and net operating loss utilization	(1.50%)	(1.00%)	(1.00%)	(0.80%)
Purchased intangible assets	0.40%	0.30%	0.40%	0.50%
Denmark assets held for sale	0.00%	0.00%	1.50%	0.00%
Internal reorganization of certain intellectual property rights	(1.50%)	0.00%	(2.10%)	0.00%
GILTI	1.60%	1.30%	1.60%	1.40%
US tax reform	0.00%	0.00%	(0.60%)	(0.30%)
Swiss tax reform	(3.10%)	(1.00%)	0.00%	0.00%
Permanent items	(0.10%)	0.30%	0.20%	0.30%
Other	(0.80%)	(1.00%)	(0.30%)	(0.20%)
Effective tax rate	11.90%	20.40%	16.30%	21.30%