Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reconciliation between the U.S. federal statutory tax rate and effective tax rate
Statutory rate	35.00%	35.00%	35.00%	35.00%
State taxes	1.20%	1.20%	0.50%	1.20%
Taxes on foreign earnings	(10.70%)	(9.30%)	(10.10%)	(8.90%)
Credits and net operating loss utilization	1.10%	0.60%	0.90%	0.80%
Purchased intangible assets	1.50%	0.70%	1.20%	1.10%
Manufacturing deduction	(2.10%)	(2.00%)	(2.00%)	(1.90%)
Permanent items	0.50%	0.40%	0.60%	0.40%
Other	0.00%	(1.20%)	0.30%	(0.30%)
Effective tax rate	24.30%	24.20%	24.60%	25.80%