Income Taxes (Reconciliation of the U.S. Federal Statutory Tax Rate to the Company's Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	1.00%	2.30%	2.40%
Non-U.S. local income taxes	5.90%	3.50%	4.10%
Foreign permanent adjustments	0.40%	1.60%	7.40%
Foreign rate differential	(10.50%)	(11.30%)	(13.60%)
Net U.S. tax on non-U.S. earnings and foreign withholdings	11.90%	5.80%	(1.80%)
Provision for/resolution of tax audits and contingencies, net	2.40%	(3.40%)	12.60%
Research and development and other tax credits	(1.50%)	(1.20%)	(2.40%)
Adjustment to beginning-of-the-year valuation allowances	(6.40%)	(0.10%)	0.10%
Worthless stock deduction			(55.50%)
Other	2.20%	0.30%	0.50%
Effective income tax rate	40.40%	32.50%	(11.20%)