Income Taxes (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
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	1.90%	0.80%	4.40%	0.80%
Taxes on foreign earnings	(7.20%)	(7.60%)	(8.40%)	(7.90%)
Credits and net operating loss utilization	(3.50%)	(3.90%)	(3.40%)	(3.80%)
Purchased intangible assets	1.80%	1.10%	1.50%	1.10%
Manufacturing deduction	(2.40%)	(2.10%)	(11.10%)	(2.10%)
Permanent items	(1.00%)	(0.30%)	1.80%	(1.00%)
Other	(0.20%)	0.80%	(0.20%)	0.60%
Effective tax rate	24.40%	23.80%	19.60%	22.70%