Income Taxes (Reconciliation of U.S. Federal Statutory Income Tax Rate and Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
U.S. federal statutory income tax rate	21.00%	21.00%	35.00%
Foreign tax rate difference	9.80%	7.40%	(5.90%)
Non-deductible expenses	4.40%	2.90%	0.10%
Global intangible low-taxed income, net	2.80%	1.80%
Other	2.80%	(2.50%)	(1.90%)
Uncertain tax positions, net of tax audit settlements	1.70%	3.80%	7.00%
Foreign currency	1.40%	0.30%	0.70%
Foreign withholding taxes	1.30%	1.00%	0.70%
State taxes	1.30%	0.70%	(0.60%)
Tax rate changes	0.90%	(3.00%)	25.20%
Goodwill dispositions and impairments	(1.20%)		(0.50%)
Tax credits	(3.20%)	(1.70%)	(1.20%)
Foreign derived intangible income deduction	(3.20%)	(1.60%)
Net adjustment of prior year accrual	(5.00%)	(4.20%)	(1.00%)
Adjustment of valuation allowances	(16.10%)	(6.00%)	(1.90%)
Effective tax rate	18.70%	19.90%	55.70%