Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	21.00%	35.00%	35.00%
State income tax, net of federal tax benefit	2.60%	1.90%	1.80%
Taxation on international earnings	(0.80%)	(5.50%)	(4.80%)
Foreign derived intangible income	(1.30%)	(0.00%)	(0.00%)
Share-based compensation from settlements under ASU 2016-09	(4.70%)	(7.30%)	(0.00%)
Domestic manufacturing exclusions	(0.00%)	(1.10%)	(1.00%)
Research and development credit	(0.90%)	(0.90%)	(0.80%)
Impact of the Tax Cuts and Jobs Act	0.50%	9.40%	0.00%
State income tax carryforwards	(0.20%)	(1.40%)	(0.00%)
Other, net	1.40%	0.80%	0.80%
Effective tax rate	17.60%	30.90%	31.00%