Income Taxes (Effective Income Tax Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
U.S. federal corporate tax rate	21.00%	35.00%	35.00%
Tax on international operations other than U.S. tax rate	4.80%	(4.50%)	(2.90%)
Reversal of prior valuation allowance	0.00%	(0.50%)	(0.30%)
Adjustments to reserves for unrecognized tax benefits	0.20%	(0.20%)	(0.60%)
U.S. tax on international earnings, net of foreign tax credits	0.20%	0.10%	1.30%
State income taxes, net of federal tax effect	2.30%	0.20%	0.80%
U.S. research and development credits	(0.90%)	(0.80%)	(0.80%)
Excess tax benefits on share-based payments	(6.00%)	(14.10%)	0.00%
Impact of 2017 Tax Act	(2.90%)	15.90%	0.00%
Tax on undistributed earnings of subsidiaries	(1.30%)	4.40%	0.00%
Venezuela deconsolidation	0.00%	1.70%	0.00%
Other business credits and Section 199 Deduction	0.00%	(0.60%)	(1.10%)
Other	0.20%	(0.20%)	(0.10%)
Effective tax rate	17.20%	36.40%	28.70%